SMA SUNNY TRIPOWER CORE1, SUNNY TRIPOWER CORE1-US, STP 50-40 Operating Manual

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SUNNY TRIPOWER

STP50-40-BE-en-12 | Version 1.2ENGLISH

Operating manual

SUNNY TRIPOWER CORE1

Legal Provisions

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-122

Legal Provisions

The information contained in these documents is property of SMA Solar Technology AG. Any publication, whether in whole or in part, requires prior written approval by SMA Solar Technology AG. Internal reproduction used solely for the purpose of product evaluation or other proper use is allowed and does not require prior approval.

SMA Warranty

You can download the current warranty conditions from the Internet at www.SMA-Solar.com.

Software licenses

The licenses for the used software modules can be called up on the user interface of the product.

Trademarks

All trademarks are recognized, even if not explicitly identified as such. Missing designations do not mean that a product or brand is not a registered trademark.

SMA Solar Technology AG

Sonnenallee 1 34266 Niestetal Germany Tel. +49 561 9522-0 Fax +49 561 9522-100 www.SMA.de Email: info@SMA.de

Table of Contents

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 3

Table of Contents

1 Information on this Document................................................. 6

1.1 Validity........................................................................................................................ 6

1.2 Target Group.............................................................................................................. 6

1.3 Structure...................................................................................................................... 6

1.4 Types of warning message........................................................................................ 6

1.5 Symbols ...................................................................................................................... 7

1.6 Typographies.............................................................................................................. 7

1.7 Nomenclature............................................................................................................. 7

1.8 Additional Information ............................................................................................... 7

2 Safety ........................................................................................ 9

2.1 Intended Use .............................................................................................................. 9

2.2 Safety Information...................................................................................................... 9

3 Scope of Delivery ..................................................................... 12

4 Product Overview .................................................................... 13

4.1 Product Description .................................................................................................... 13

4.2 Interfaces and Functions ............................................................................................ 15

5 Mounting................................................................................... 18

5.1 Requirements for Mounting ....................................................................................... 18

5.2 Mounting the Inverter................................................................................................. 21

6 Electrical Connection ................................................................ 24

6.1 Safety during Electrical Connection.......................................................................... 24

6.2 Overview of the Connection Area ............................................................................ 25

6.3 AC Connection........................................................................................................... 25

6.3.1 Requirements for the AC Connection......................................... 25

6.3.2 Connecting the Inverter to the Utility Grid................................. 27

6.4 DC Connection........................................................................................................... 29

6.4.1 Requirements for the DC Connection......................................... 29

6.4.2 Assembling the DC Connectors ................................................. 29

6.4.3 Connecting the PV Array ............................................................ 31

6.4.4 Disassembling the DC Connectors............................................. 34

6.5 Connecting the Multifunction Relay .......................................................................... 35

6.5.1 Procedure for connecting the multifunction relay...................... 35

6.5.2 Operating Modes of the Multifunction Relay ........................... 36

6.5.3 Connection Options.................................................................... 36

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6.5.4 Connection to the Multifunction Relay....................................... 40

6.6 Connecting the Network Cables............................................................................... 42

7 Commissioning ......................................................................... 44

7.1 Commissioning Procedure ......................................................................................... 44

7.2 Commissioning the Inverter........................................................................................ 44

7.3 Starting the Self-Test (For Italy Only) ........................................................................ 45

7.4 Selecting a configuration option ............................................................................... 46

8 Using the Inverter User Interface............................................ 50

8.1 Establishing a connection to the user interface ........................................................ 50

8.1.1 Establishing a direct connection via WLAN.............................. 50

8.1.2 Establishing a Connection via WLAN in the Local Network.... 51

8.1.3 Establishing a Connection via Ethernet in the local network.... 52

8.2 Logging In and Out of the User Interface................................................................. 53

8.3 Start Page Design of the User Interface.................................................................... 55

8.4 Displaying and Downloading the Stored Data........................................................ 57

8.5 Changing the Password............................................................................................. 58

9 Configuration of the Inverter................................................... 59

9.1 Changing Operating Parameters.............................................................................. 59

9.2 Starting the Installation Assistant............................................................................... 60

9.3 Configuring the Country Data Set............................................................................. 61

9.4 Changing the Operating Mode of the Multifunction Relay .................................... 61

9.5 Configuring the Modbus Function............................................................................. 62

9.6 Setting the Tripping Threshold of the Residual-Current Device................................ 63

9.7 Configuring Feed-In Management............................................................................ 63

9.8 Setting SMA OptiTrac Global Peak ......................................................................... 64

9.9 Activating the Receipt of Control Signals (Only for Italy)........................................ 64

9.10 Activating String-Failure Detection............................................................................ 65

9.11 Saving the Configuration in a File............................................................................. 65

9.12 Adopting a Configuration from a File....................................................................... 65

9.13 Switching the Dynamic Power Display Off............................................................... 66

9.14 Switching WLAN On and Off................................................................................... 66

9.15 Activate WPS Function............................................................................................... 67

10 Disconnecting the Inverter from Voltage Sources................. 69

11 Cleaning the Inverter ............................................................... 71

12 Troubleshooting........................................................................ 72

12.1 Event Messages ......................................................................................................... 72

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12.2 LED Signals................................................................................................................. 85

12.3 Forgotten Password.................................................................................................... 86

12.4 Checking the PV System for Ground Faults.............................................................. 87

12.5 Updating the Firmware.............................................................................................. 90

13 Decommissioning the Inverter................................................. 92

14 Technical Data .......................................................................... 96

15 Accessories ...............................................................................101

16 Contact ......................................................................................102

17 EU Declaration of Conformity .................................................104

1 Information on this Document

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Operating manualSTP50-40-BE-en-126

1 Information on this Document

1.1 Validity

This document is valid for the following device types:

• STP 50-40 (Sunny Tripower CORE1)

1.2 Target Group

This document is intended for qualified persons and end users. Only qualified persons are allowed to perform the activities marked in this document with a warning symbol and the caption "Qualifiedperson". Tasks that do not require any particular qualification are not marked and can also be performed by end users. Qualified persons must have the following skills:

• Knowledge of how an inverter works and is operated

• Training in the installation and commissioning of electrical devices and installations

• Knowledge of all applicable laws, standards and directives

• Knowledge of and compliance with this document and all safety information

• Training in how to deal with the dangers and risks associated with installing, repairing and using electrical devices and installations

1.3 Structure

This document describes the mounting, installation, commissioning, configuration, operation, troubleshooting and decommissioning of the product as well as the operation of the product user interface.

You will find the latest version of this document and further information on the product in PDF format at www.SMA-Solar.com.

1.4 Types of warning message

DANGER

Safety information that, if not avoided, will result in death or serious injury.

WARNING

Safety information that, if not avoided, could result in death or serious injury.

CAUTION

Safety information that, if not avoided, can result in minor or moderate injury.

NOTICE

Safety information that, if not avoided, can result in property damage.

1 Information on this Document

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Operating manual STP50-40-BE-en-12 7

1.5 Symbols

Symbol Explanation

Information that is important for a specific topic or goal, but is not safety-relevant

☐

Indicates a requirement for meeting a specific goal

☑

Desired result

✖

A problem that might occur

Sections describing activities to be performed by qualified persons only

1.6 Typographies

Typography Use Example

bold

• Terminals

• Slots

• Parameters

• Elements on the user interface

• Elements to be selected

• Elements to be entered

• The value can be found in the field Energy.

• Select Settings.

• Enter 10 in the field

Minutes.

• Connects several elements to be selected

• Select Settings > Date.

[Button]

• Button to be selected or pressed

• Select [Next].

1.7 Nomenclature

Complete designation Designation in this document

Sunny Tripower CORE1 Inverter, product

1.8 Additional Information

Links to additional information can be found at www.SMA-Solar.com:

Document title Document type

"Parameters and Measured Values" Overview of All Inverter Operating Parameters and Their Configura-

tion Options

Technical Information

1 Information on this Document

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-128

Document title Document type

"Webconnect Systems in SunnyPortal" Registration in SunnyPortal and setting or changing operating pa-

rameters of the inverter

User Manual

"SMAModbus® Interface" Information on the commissioning and configuration of the SMA

Modbus interface

Technical Information

"SunSpec® Modbus® Interface" Information on the commissioning and configuration of the SunSpec

Modbus interface

Technical Information

"Efficiency and Derating" Efficiency and Derating Behavior of the SunnyBoy, SunnyTripower

and SunnyMiniCentral Inverters

Technical Information

2 Safety

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Operating manual STP50-40-BE-en-12 9

2 Safety

2.1 Intended Use

The SunnyTripower is a transformerless PV inverter, with 6 MPPtrackers, that converts the direct current of the PV array to grid-compliant, three-phase current and feeds it into the utility grid.

The product is suitable for indoor and outdoor use. The product must only be operated with PV arrays of protection class II in accordance with

IEC61730, application class A. The PV modules must be compatible with this product. The product is not equipped with a transformer and therefore has no galvanic isolation. The

product must not be operated with PV modules whose outputs are grounded. This can cause the product to be destroyed. The product may be operated with PV modules whose frame is grounded.

PV modules with a high capacity to ground must only be used if their coupling capacity does not exceed 12.6μF (for information on how to calculate the coupling capacity, see the Technical Information "Leading Leakage Currents" at www.SMA-Solar.com).

All components must remain within their permitted operating ranges and their installation requirements at all times.

The product must only be used in countries for which it is approved or released by SMA Solar Technology AG and the grid operator.

The product is also approved for the Australian market and may be used in Australia. If DRM support is specified, the inverter may only be used in conjunction with a Demand Response Enabling Device (DRED). This ensures that the inverter implements the commands from the grid operator for active power limitation at all times. The inverter and the Demand Response Enabling Device (DRED) must be connected in the same network and the inverter Modbus interface must be activated and the TCP server set.

Use this product only in accordance with the information provided in the enclosed documentation and with the locally applicable standards and directives. Any other application may cause personal injury or property damage.

Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such changes.

Any use of the product other than that described in the Intended Use section does not qualify as the intended use.

The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for future reference and observe all instructions contained therein.

The type label must remain permanently attached to the product.

2.2 Safety Information

This section contains safety information that must be observed at all times when working on or with the product.

To prevent personal injury and property damage and to ensure long-term operation of the product, read this section carefully and observe all safety information at all times.

2 Safety

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DANGER

Danger to life due to high voltages of the PV array

When exposed to light, the PV array generates dangerous DC voltage, which is present in the DC conductors and the live components of the inverter. Touching the DC conductors or the live components can lead to lethal electric shocks. If you disconnect the DC connectors from the inverter under load, an electric arc may occur leading to electric shock and burns.

• Do not touch non-insulated cable ends.

• Do not touch the DC conductors.

• Do not touch any live components of the inverter.

• Have the inverter mounted, installed and commissioned only by qualified persons with the appropriate skills.

• If an error occurs, have it rectified by qualified persons only.

• Prior to performing any work on the inverter, disconnect it from all voltage sources as described in this document.

DANGER

Danger to life due to electric shock

Touching an ungrounded PV module or array frame can cause a lethal electric shock.

• Connect and ground the frame of the PV modules, the array frame and the electrically conductive surfaces so that there is continuous conduction. Observe the applicable local regulations.

CAUTION

Risk of burns due to hot enclosure parts

The enclosure and the enclosure lid may get hot during operation. The DC load-break switch can not become hot.

• Do not touch hot surfaces.

• Wait until the inverter has cooled down before touching the enclosure or enclosure lid.

NOTICE

Damage to the enclosure seal in subfreezing conditions

If you open the product when temperatures are below freezing, the enclosure seals can be damaged. Moisture can penetrate the product then.

• Only open the product if the ambient temperature is not below -5°C.

• If a layer of ice has formed on the enclosure seal when temperatures are below freezing, remove it prior to opening the product (e.g. by melting the ice with warm air). Observe the applicable safety regulations.

2 Safety

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Operating manual STP50-40-BE-en-12 11

NOTICE

Damage to the type label due to the use of cleaning agents

• If the inverter is dirty, clean the enclosure, the enclosure lid, the type label and the LEDs with a damp cloth and clear water only.

3 Scope of Delivery

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Operating manualSTP50-40-BE-en-1212

3 Scope of Delivery

Check the scope of delivery for completeness and any externally visible damage. Contact your distributor if the scope of delivery is incomplete or damaged.

B C E

Figure 1: Components included in the scope of delivery

Position Quantity Designation

A 1 Inverter B 4 Foot C 8 Hexagon bolt M8x40 D 8 Washer E 4 Carrying handle F 12 Positive DC connector G 12 Negative DC connector H 24 Sealing plug for DC connectors I 1 Cable gland M63 with counter nut J 1 3-pole terminal block K 1 Quick Reference Guide

4 Product Overview

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4 Product Overview

4.1 Product Description

Figure 2: Design of the SunnyTripower

Position Designation

A Cover B AC Connection Unit C DC Connection Unit D LEDs

The LEDs indicate the operating state of the inverter. E Cable glands for data cables F DC load-break switch G DC connector H Fan bracket with three fans I Type label

The type label clearly identifies the product. The type label must remain

permanently attached to the product. You will find the following informa-

tion on the type label:

• Device type (Model)

• Serial number (Serial No. or S/N)

• Date of manufacture

• Device-specific characteristics

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Position Designation

J Additional label with details for registration in SunnyPortal and WLAN

password:

• Identification key (PIC) for registration in Sunny Portal

• Registration ID (RID) for registration in Sunny Portal

• WLAN password (WPA2-PSK) for the direct connection to the user interface of the inverter via WLAN

K Enclosure opening for AC connection L Enclosure opening for additional cable M Enclosure opening for carrying handle

Symbols on the Product and on the Type Label

Symbol Explanation

Inverter Together with the green LED, this symbol indicates the operating state of

the inverter. Observe the documentation

Together with the red LED, this symbol indicates an error. Data transmission

Together with the blue LED, this symbol indicates the status of the network connection.

Grounding conductor This symbol indicates the position for connecting a grounding conductor.

Grounding This symbol indicates the position for the connection of an additional

grounding conductor. Risk of burns due to hot surfaces

The product can get hot during operation. Avoid contact during operation. Prior to performing any work on the product, allow the product to cool down sufficiently.

Danger to life due to electric shock The product operates at high voltages. Prior to performing any work on

the product, disconnect the product from voltage sources. All work on the product must be carried out by qualified persons only.

Observe the documentation Observe all documentation supplied with the product.

4 Product Overview

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Symbol Explanation

Danger This symbol indicates that the product must be additionally grounded if

additional grounding or equipotential bonding is required at the installation site.

Direct current

The product is has no galvanic isolation.

Three-phase alternating current with neutral conductor

WEEE designation Do not dispose of the product together with the household waste but in

accordance with the disposal regulations for electronic waste applicable at the installation site.

CE marking The product complies with the requirements of the applicable EU direc-

tives. Degree of protectionIP65

The product is protected against dust intrusion and water jets from any angle.

The product is suitable for outdoor installation.

4.2 Interfaces and Functions

The inverter can be equipped or retrofitted with the following interfaces and functions:

User interface for monitoring and configuration

The product is equipped as standard with an integrated webserver, which provides a user interface for configuring and monitoring the product. The product user interface can be called up via the web browser if there is an existing connection to an end device (e.g. computer, tablet PC or smartphone).

SMA Speedwire

The product is equipped with SMASpeedwire as standard. SMASpeedwire is a type of communication based on the Ethernet standard. SMASpeedwire is designed for a data transfer rate of 100Mbps and enables optimum communication between Speedwire devices within systems.

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Operating manualSTP50-40-BE-en-1216

SMA Webconnect

The inverter is equipped with a Webconnect function as standard. The Webconnect function enables direct data transmission between the inverters of a small-scale plant and the Internet portals SunnyPortal and SunnyPlaces without any additional communication device and for a maximum of 4 inverters per visualized system. In large-scale PV power plants with more than 4 inverters, there is the option of establishing data transmission between the inverters and the web-based monitoring platform SunnyPortal and SunnyPlaces via the SMAClusterController or to distribute the inverters over several plants. If there is an existing WLAN or Ethernet connection, you can directly access your visualized system via the web browser on your end device.

WLAN

The product is equipped with a WLAN interface as standard. The inverter is delivered with the WLAN interface activated as standard. If you do not want to use WLAN, you can deactivate the WLAN interface.

In addition, the product has a WPS function. The WPS function is for automatically connecting the product to a network (e.g. via router) and establish a direct connection between the product and an end device.

Expanding the radio range in the WLAN network

In order to expand the radio range of the inverter in the WLAN network, you can install the Antenna Extension Kit accessory set in the inverter.

Modbus

The product is equipped with a Modbus interface. The Modbus interface is deactivated by default and must be configured as needed.

The Modbus interface of the supported SMA products is designed for industrial use – via SCADA systems, for example – and has the following tasks:

• Remote query of measured values

• Remote setting of operating parameters

• Setpoint specifications for system control

Module slots

The inverter is standard-equipped with two module slots. The module slots are located on the communication assembly and allow additional modules to be connected (e.g. SMA Sensor Module). The modules are available as accessories. The installation of two identical modules is not permissible.

SMA RS485 Module

With the assembly of the RS485 Module, the inverter can communicate with special SMAcommunication products (Information on assembly and connection see manual of the SMA RS485 Module). The SMA RS485 Module can be retrofitted.

Grid management services

The product is equipped with service functions for grid management. Depending on the requirements of the grid operator, you can activate and configure the functions

(e.g. active power limitation) via operating parameters.

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Operating manual STP50-40-BE-en-12 17

Antenna Extension Kit

Within the WLAN network, the Antenna Extension Kit enables the radio range of the inverter to be upgraded (Information on assembly and connection see manual of the Antenna Extension Kit). The Antenna Extension Kit can be retrofitted.

SMA I/O modules

The SMA I/O Module enables the inverter to perform grid management services (for information on installation and connection, see the manual of the SMA I/O Module). The SMA I/O Module can be retrofitted.

SMA Sensor Module

The SMA Sensor Module has different interfaces for connecting various sensors (i.e. temperature sensor, irradiation sensor, anemometer or energy meter). The SMA Sensor Module converts the signals of the connected sensors and transmits them to the inverter. The SMA Sensor Module can be retrofitted.

Multifunction Relay

The inverter is equipped with a multifunction relay as standard. The multifunction relay is an interface that can be configured for the operating mode used by a particular system.

SMAOptiTracGlobalPeak

SMAOptiTracGlobalPeak is an advancement of SMAOptiTrac and allows the operating point of the inverter to follow the optimal operating point of the PV array (MPP) precisely at all times. In addition, with the aid of SMAOptiTracGlobalPeak, the inverter detects several maximum power points in the available operating range, such as may occur particularly with partially shaded strings. SMA OptiTrac Global Peak is enabled by default.

String-Failure Detection

The string-failure detection measures the total current of every input and continuously calculates the mean values for the inputs in question. The total currents are compared with the mean values. If a total current exceeds or falls short of the mean value by the set tolerance value, an event is reported. Marginally increased total currents are reliably detected over several query intervals and distinguished from typical current fluctuations of the PV array. String-failure detection is deactivated by default and must be activated. In addition, the tolerance value can be set via the user interface and the mean values read off.

Surge Arrester TypeII

On the AC and DC side, the inverter is equipped with slots for type II surge protection devices. The surge protection devices limit dangerous overvoltages. The surge protection devices can be retrofitted.

5 Mounting

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5 Mounting

5.1 Requirements for Mounting

Requirements for the Mounting Location:

WARNING

Danger to life due to fire or explosion

Despite careful construction, electrical devices can cause fires.

• Do not mount the product in areas containing highly flammable materials or gases.

• Do not mount the product in potentially explosive atmospheres.

☐ The mounting location must be inaccessible to children. ☐ A solid, flat support surface must be available for mounting. ☐ The mounting location must be suitable for the weight and dimensions of the inverter (see

Section14 "Technical Data", page96).

☐ The mounting location should be freely and safely accessible at all times without the need for

any auxiliary equipment (such as scaffolding or lifting platforms). Non-fulfillment of these criteria may restrict servicing.

☐ The inverter can be mounted in a position that is directly exposed to solar irradiation. There is,

however, the possibility that the inverter reduces its power output to avoid overheating due to

high temperatures. ☐ The DC load-break switch of the inverter must always be freely accessible. ☐ Climatic conditions must be met (see Section14 "Technical Data", page96).

5 Mounting

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Dimensions for mounting:

M8x14/17+1

155

205

155

205

46.2 46.2

112.85

119.17

112.85

119.17

155

205

155

205

79.479.4

395

Figure 3: Position of the anchoring points(Dimensions in mm)

Structural Stability:

☐ When mounting with feet or profile rails, the width of one foot or the profile rail must be at

least 175mm to ensure structural stability. ☐ The inverter must be attached under the following conditions:

– Inclination of the support surface: >3° – Wind speed (without wind gusts): > 25m/s – Height of the feet or the profile rail: > 100mm

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Operating manualSTP50-40-BE-en-1220

☐ When mounting with profile rails, an attachment or fixation by loading is required. When

mounting with profile rail, SMA Solar Technology AG recommends to bolt the profile rail e.g.

to the profile of the module frame or to attach a sheet metal (which can be weighted with

stones or with sandbags) at the profile rails. This will ensure that the inverter is fixed.

Figure 4: Attachment of the inverters (examples)

Recommended Clearances:

If you maintain the recommended clearances, adequate heat dissipation will be ensured. Thus, you will prevent power reduction due to excessive temperature.

☐ Maintain the recommended clearances to roof edges, skylights, walls as well as to other

inverters or objects. This ensures that the DC load-break switch on the inverter can be operated

easily and the LED signals can be read without difficulty. ☐ For possible service deployments, SMA Solar Technology AG recommends ensuring sufficient

clearance from walls, other inverters or objects on all four sides of the inverter enclosure. Non-

fulfillment of these criteria may restrict servicing. ☐ If multiple inverters are mounted in areas with high ambient temperatures, increase the

clearances between the inverters and ensure sufficient fresh-air supply.

5 Mounting

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Operating manual STP50-40-BE-en-12 21

1000 (39.37)1000 (39.37)

300

(11.81)

300

(11.81)

900 (35.43)900 (35.43)

1000 (39.37)

100 (3.94)

Figure 5: Recommended clearances(Dimensions in mm)

Permitted and prohibited mounting positions:

☐ The inverter must only be mounted in one of the permitted positions. This will ensure that no

moisture can penetrate the inverter. ☐ The inverter should be mounted in such a way that the LED signals can be read without

difficulty.

Figure 6: Permitted and prohibited mounting positions

5.2 Mounting the Inverter

CAUTION

Risk of injury when lifting the inverter, or if it is dropped

The inverter weighs 84kg. You risk injury if you lift the inverter incorrectly or if it is dropped while being transported or mounted.

• Carry and lift the inverter upright with the help of several people. For this purpose, take hold of the carrying handles on the inverter. Always take hold of the two carrying handles mounted both on each side.

• Take into account the center of gravity of the inverter. The center of gravity is on the side of the AC connection unit.

5 Mounting

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Operating manualSTP50-40-BE-en-1222

Procedure:

1. Tighten every foot with two M8x40 hexagon screws and two washers on the two external taps (M8x14) on the underside of the inverter (torque: 16Nm).

2. Screw all four transport handles as far as they will go into the taps on the right- and left-hand side until they lie flush with the enclosure. When doing so, ensure that the transport handles are screwed into the taps so that they are perfectly straight. If the transport handles are not screwed in straight, this can make it more difficult or even impossible to unscrew them later on and can damage the taps to the extent that transport handles can no longer be screwed into them.

4x4x

3. Insert a screwdriver into the holes in the transport handle and turn the screwdriver through 90°. This ensures that the transport handles are securely tightened.

90°

4. Remove the inverter from the Euro pallet and position the inverter at the installation location.

5. Make sure that the inverter is stable.

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Operating manual STP50-40-BE-en-12 23

6. Remove all four transport handles from the taps. If necessary, insert a screwdriver into the holes on the transport handle and use the screwdriver to remove the transport handle.

4x4x

6 Electrical Connection

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6 Electrical Connection

6.1 Safety during Electrical Connection

DANGER

Danger to life due to high voltages of the PV array

• Do not touch non-insulated cable ends.

• Do not touch the DC conductors.

• Do not touch any live components of the inverter.

• Have the inverter mounted, installed and commissioned only by qualified persons with the appropriate skills.

• If an error occurs, have it rectified by qualified persons only.

• Prior to performing any work on the inverter, disconnect it from all voltage sources as described in this document.

NOTICE

Damage to the enclosure seal in subfreezing conditions

If you open the product when temperatures are below freezing, the enclosure seals can be damaged. Moisture can penetrate the product then.

• Only open the product if the ambient temperature is not below -5°C.

NOTICE

Damage to the inverter due to electrostatic discharge

Touching electronic components can cause damage to or destroy the inverter through electrostatic discharge.

• Ground yourself before touching any component.

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6.2 Overview of the Connection Area

Figure 7: Connection areas of the inverters' AC Connection Unit and DC Connection Unit

Position Designation

A Slots for AC surge protection devices B Terminal blocks for AC connection C Bridge between N and enclosure D Grounding terminal for grounding conductor connection E Enclosure opening for cable gland M63 F Enclosure opening for additional cable G Cable glands for network cables and, if needed, for the connection ca-

bles of the AntennaExtensionKit or other data cables H Positive and negative connectors for DC connection I Slots for DC surge protection devices J Communication assembly

6.3 AC Connection

6.3.1 Requirements for the AC Connection

Cable requirements:

☐ The conductors must be made of aluminum or copper. ☐ External diameter: 35mm to 48mm ☐ Conductor cross-section: 35mm² to 120mm² ☐ Insulation stripping length: 30mm

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Operating manualSTP50-40-BE-en-1226

☐ Sheath stripping length: 290mm ☐ The cable must be dimensioned in accordance with the local and national directives for the

dimensioning of cables. The requirements for the minimum wire size derive from these directives. Examples of factors influencing cable dimensioning are: nominal AC current, type of cable, routing method, cable bundling, ambient temperature and maximum desired line losses (for calculation of line losses, see the design software "SunnyDesign" from software version2.0 at www.SMA-Solar.com).

Overview of the required length of the conductor inside the AC connection unit

300

181

193

Figure 8: Interior view of the AC connection unit with dimensions for the conductors (Dimensions in mm)

Load-break switch and cable protection:

NOTICE

Damage to the inverter due to the use of screw-type fuses as load-break switches

Screw-type fuses (e.g. DIAZED fuse or NEOZED fuse) are not load-break switches.

• Do not use screw-type fuses as load-break switches.

• Use a load-break switch or circuit breaker as a load disconnection unit (for information and design examples, see the Technical Information "Circuit Breaker" at www.SMA-Solar.com).

☐ In PV systems with multiple inverters, protect each inverter with a separate three-phase circuit

breaker. Make sure to observe the maximum permissible fuse protection (see Section14 "Technical Data", page96). This will prevent residual voltage being present at the corresponding cable after disconnection.

☐ Loads installed between the inverter and the circuit breaker must be fused separately.

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Operating manual STP50-40-BE-en-12 27

Residual-current monitoring unit:

☐ If an external residual-current device is required, install a typeB residual-current device that

trips at a residual current of 500mA or higher (for details on selecting a residual-current device, see the Technical Information ""Criteria for Selecting a Residual-Current Device"" at www.SMA-Solar.com). Residual-current devices with a tripping threshold <500mA can be used. The tripping threshold of 300mA must not be undershot.

☐ If a residual-current device with a tripping threshold <500mA is used, you must set the

tripping threshold of the residual-current device in the inverter (see Section9.6, page63).

Overvoltage category:

The inverter can be used in grids of overvoltage categoryIII or lower in accordance with IEC60664-1. That means that the inverter can be permanently connected to the grid-connection point of a building. In case of installations with long outdoor cabling routes, additional measures to reduce overvoltage categoryIV to overvoltage categoryIII are required (see the Technical Information "Overvoltage Protection" at www.SMA-Solar.com).

6.3.2 Connecting the Inverter to the Utility Grid

Requirements:

☐ The connection requirements of the grid operator must be met. ☐ The grid voltage must be within the permissible range. The exact operating range of the

inverter is specified in the operating parameters.

Procedure:

1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.

2. Ensure that the DC load-break switch is in the O position and is secured against reconnection.

3. If the enclosure lid of the AC Connection Unit is mounted, remove all ten screws of the enclosure lid using a Torx screwdriver (TX25) and remove the enclosure lid towards the front.

10x10x

4. Remove the adhesive tape from the enclosure opening for the AC connection.

5. Insert the cable gland M63 into the opening and screw the counter nut on from the inside.

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Operating manualSTP50-40-BE-en-1228

6. Thread the AC cable through the cable gland into the AC Connection Unit. If necessary, slightly loosen the swivel nut of the cable gland.

7. Dismantle the AC cable.

8. Strip off the insulation of L1, L2, L3, N and PE by 30mm.

9. Connect the grounding conductor to the ground terminal. Use a Torx screwdriver (TX25) to slightly loosen one of the screws with which the clip and connection plate are connected to the ground connection and to completely remove the other screw. Then place the grounding conductor onto the connection plate, route the clip via the grounding conductor and tighten both screws with a Torx screwdriver (TX25) (torque: 6Nm).

10. Ensure that the conductor is on the connection plate.

11. Connect L1, L2, L3 and, if necessary, N to the terminals according to the label. To do so, position each conductor as far as they will go into the corresponding terminal and tighten the screw of the terminal using a Allen key (AF8) (20Nm torque for a conductor cross-section of 35mm² to 95mm²; 30Nm torque for a cable cross-section of 120mm²).

12.

WARNING

Danger to life due to electric shock

The inverter is delivered with a bridge between N and the enclosure as standard. The bridge is absolutely essential if the connection to a utility grid is established without a neutral conductor.

If the utility grid is connected with a neutral conductor, the bridge must always be removed.

• When N is present and connected to the corresponding terminal, remove the bridge installed as standard between N and the enclosure ( ).

13. Ensure that the correct conductors are assigned to all the terminals.

14. Make sure that all conductors are securely in place.

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Operating manual STP50-40-BE-en-12 29

6.4 DC Connection

6.4.1 Requirements for the DC Connection

Requirements for the PV modules per input:

☐ All PV modules must be of the same type. ☐ All PV modules must be aligned and tilted identically. ☐ On the coldest day based on statistical records, the open-circuit voltage of the PV array must

never exceed the maximum input voltage of the inverter. ☐ The same number of series-connected PV modules must be connected to each string. ☐ The maximum input current per string must be maintained and must not exceed the through-

fault current of the DC connectors (see Section14 "Technical Data", page96). ☐ The thresholds for the input voltage and the input current of the inverter must be adhered to

(see Section14 "Technical Data", page96). ☐ The positive connection cables of the PV modules must be equipped with positive DC

connectors (see Section6.4.2, page29). ☐ The negative connection cables of the PV modules must be equipped with the negative DC

connectors (see Section6.4.2, page29).

Use of Y adapters for parallel connection of strings

The Y adapters must not be used to interrupt the DC circuit.

• Do not use the Y adapters in the immediate vicinity of the inverter. The adapters must not be visible or freely accessible.

• In order to interrupt the DC circuit, always disconnect the inverter as described in this document (see Section10, page69).

6.4.2 Assembling the DC Connectors

For connection to the inverter, all PV module connection cables must be fitted with the DC connectors provided. Assemble the DC connectors as described in the following. Be sure to observe the correct polarity. The DC connectors are marked with the symbols "+" and "−".

Figure 9: Negative (A) and positive (B) DC connectors

Cable requirements:

☐ Cable type: PV1-F, UL-ZKLA, USE2 ☐ External diameter: 5mmto8mm ☐ Conductor cross-section: 2.5mm²to6mm²

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Operating manualSTP50-40-BE-en-1230

☐ Qty single wires: minimum7 ☐ Nominal voltage: minimum 1000V ☐ Using bootlace ferrules is not allowed.

DANGER

Danger to life due to high voltages on the DC conductors

When exposed to sunlight, the PV array generates dangerous DC voltage which is present in the DC conductors. Touching the DC conductors can lead to lethal electric shocks.

• Ensure that the inverter is disconnected from all voltage sources.

• Do not touch non-insulated cable ends.

• Do not touch the DC conductors.

NOTICE

Destruction of the inverter due to overvoltage

If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter, the inverter can be destroyed due to overvoltage.

• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter, do not connect any strings to the inverter and check the design of the PV system.

Procedure:

1. Strip 12mm of the cable insulation.

2. Insert the stripped cable into the DC connector up to the stop. When doing so, ensure that the stripped cable and the DC connector are of the same polarity.

3. Press the clamping bracket down until it audibly snaps into place.

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☑ The stranded wire can be seen inside the

clamping bracket chamber.

✖ The stranded wire cannot be seen in the chamber?

The cable is not correctly in place.

• Release the clamping bracket. To do so, insert a screwdriver (blade width: 3.5mm) into the clamping bracket and pry the clamping bracket open.

• Remove the cable and go back to step2.

4. Push the swivel nut up to the thread and tighten (torque: 2Nm).

6.4.3 Connecting the PV Array

NOTICE

Damage to the inverter due to ground fault on DC side during operation

Due to the transformerless topology of the product, the occurance of ground faults on DC side during operation can lead to irreparable damage. Damages to the product due to a faulty or damaged DC installation are not covered by warranty. The product is equipped with a protective device that checks whether a ground fault is present during the starting sequence. The product is not protected during operation.

• Ensure that the DC installation is carried out correctly and no ground fault occurs during operation.

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Operating manualSTP50-40-BE-en-1232

NOTICE

Damage to the DC connectors due the use of contact cleaner of other cleaning agents

Some contact cleaners or other cleaning agents may contain substances that decompose the plastic of the DC connectors.

• Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.

NOTICE

Destruction of the inverter due to overvoltage

If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter, the inverter can be destroyed due to overvoltage.

• If the open-circuit voltage of the PV modules exceeds the maximum input voltage of the inverter, do not connect any strings to the inverter and check the design of the PV system.

NOTICE

Destruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 1000V or higher.

Procedure:

1. Ensure that the circuit breaker is switched off and that it cannot be reconnected.

2. Set the DC load-break switch of the inverter to position O.

3. Secure the DC load-break switch against reconnection using a padlock.

4. Measure the PV array voltage. Ensure that the maximum input voltage of the inverter is adhered to and that there is no ground fault in the PV array.

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5. Check whether the DC connectors have the correct polarity. If the DC connector is equipped with a DC cable of the wrong polarity, the DC connector must

be reassembled. The DC cable must always have the same polarity as the DC connector.

6. Ensure that the open-circuit voltage of the PV array does not exceed the maximum input voltage.

7. Connect the assembled DC connectors to the inverter.

☑ The DC connectors snap into place.

8. Ensure that all DC connectors are securely in place.

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Operating manualSTP50-40-BE-en-1234

NOTICE

Damage to the inverter due to moisture ingress

If the electrical connection is not made immediately after the installation, the inverter is not sealed and moisture can penetrate the inverter. The inverter is only sealed if the DC connectors are connected to the inverter with the DC conductors or with sealing plugs.

If the electrical connection is to be carried out at a later time, close the DC inputs on the inverter with DC connectors and sealing plugs as described below.

• Do not insert the sealing plugs directly into the DC inputs on the inverter.

• For unused DC connectors, push down the clamping bracket and push the swivel nut up to the thread.

• Insert the sealing plug into the DC connector.

• Insert the DC connectors with sealing plugs into the corresponding DC inputs on the inverter.

☑ The DC connectors snap into place.

• Ensure that the DC connectors with sealing plugs are securely in place.

6.4.4 Disassembling the DC Connectors

To disassemble the DC connectors (e.g. due to faulty assembly), proceed as follows.

DANGER

Danger to life due to high voltages on the DC conductors

When exposed to sunlight, the PV array generates dangerous DC voltage which is present in the DC conductors. Touching the DC conductors can lead to lethal electric shocks.

• Ensure that the inverter is disconnected from all voltage sources.

• Do not touch non-insulated cable ends.

• Do not touch the DC conductors.

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Procedure:

1. Release and remove all DC connectors. To do this, insert a flat-blade screwdriver or an angled screwdriver (blade width 3.5mm) into one of the slide slots and pull the DC connectors out in a downward direction. Do not pull on the cable.

2. Remove the DC connector swivel nut.

3. Unlock the DC connector. To do this, insert a flatblade screwdriver (blade width: 3.5mm) into the side catch mechanism and pry the catch mechanism open.

4. Carefully pull the DC connector apart.

5. Release the clamping bracket. To do so, insert a flatblade screwdriver (blade width: 3.5mm) into the clamping bracket and pry the clamping bracket open.

6. Remove the cable.

6.5 Connecting the Multifunction Relay

6.5.1 Procedure for connecting the multifunction relay

Procedure See

1. Select for which operating mode you would like to use the multifunction relay.

Section6.5.2, page36

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Operating manualSTP50-40-BE-en-1236

Procedure See

2. Connect to the multifunction relay according to the operating mode and the associated connection variant.

Section6.5.3, page36 and Section6.5.4, page40

3. After commissioning the inverter, change the operating mode of the multifunction relay, if necessary.

Section9.4, page61

6.5.2 Operating Modes of the Multifunction Relay

Operating mode of multifunction relay (Mlt.OpMode)

Description

Fault indication (FltInd)

The multifunction relay controls a display device (e.g. a warning light) which, depending on the type of connection, signals either an error or the undisturbed operation of the inverter.

Self-consumption (SelfCsmp)

The multifunction relay switches loads on or off, depending on the power production of the PV system.

Control via communication (ComCtl)

The multifunction relay switches loads on or off according to commands transmitted by a communication product.

Battery bank (BatCha)

The multifunction relay controls the charging of the batteries depending on the power production of the PV system.

Fan control (FanCtl)

The multifunction relay controls an external fan, depending on the temperature of the inverter.

Switching status grid relay (GriSwCpy)

The local grid operator may require that a signal is transmitted as soon as the inverter connects to the utility grid. The multifunction relay can be used to trigger this signal.

6.5.3 Connection Options

The connection procedures vary, depending on the operating mode.

Operating mode Connection option

Fault indication (FltInd)

Using the Multifunction Relay as a Fault Indicator Contact

Self-consumption (SelfCsmp)

Controlling loads via the multifunction relay or charging batteries depending on the power production of the PV system

Control via communication (ComCtl)

Controlling loads via the multifunction relay or charging batteries depending on the power production of the PV system

Battery bank (BatCha)

Controlling loads via the multifunction relay or charging batteries depending on the power production of the PV system

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Operating mode Connection option

Fan control (FanCtl)

Connecting the external fan (see fan documentation)

Switching status grid relay (GriSwCpy)

Reporting the switching status of the grid relay

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Operating manualSTP50-40-BE-en-1238

Using the Multifunction Relay as a Fault Indicator Contact

You can use the multifunction relay as a fault indicator contact and have an error or smooth operation of the inverter displayed or signaled via a suitable display device. You can connect multiple inverters to one fault indicator or operation indicator, as needed.

B F

= =

Light on

Grounding,

if applicable

Trouble-free

operation (B)

Error (F)

Operation message

Error message

Fuse

Light on

Error in the inverter

Inverter in operation

Fuse

max. 30 V

Figure 10: Circuit diagram with multiple inverters for connection to an operation indicator and circuit diagram for connection to a fault indicator (example)

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Controlling loads via the multifunction relay or charging batteries depending on the power production of the PV system

The multifunction relay can control loads or charge batteries power-dependently. To enable this function, you must connect a contactor (K1) to the multifunction relay. The contactor (K1) switches the operating current for the load on or off. If you want batteries to be charged depending on the available power, the contactor activates or deactivates the charging of the batteries.

B F

max. 30 V

Fuse

Figure 11: Wiring diagram for connection for controlling a load or for the power-dependent charging of the batteries

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Operating manualSTP50-40-BE-en-1240

Reporting the switching status of the grid relay

The multifunction relay can trip a signal to the grid operator as soon as the inverter connects to the utility grid. To enable this function, the multifunction relays of all inverters must be connected in parallel.

1 kΩ

B F

Signal to grid operator

Inverter 1: Grid relay closed

Inverter Grid relay open

max. 30 V

Figure 12: Wiring diagram for signaling the switching status of the grid relay (example)

6.5.4 Connection to the Multifunction Relay

Requirement:

☐ The technical requirements of the multifunction relay must be met (see Section14 "Technical

Data", page96).

Cable requirements:

• Conductor cross-section: 0.2mm² to 1.5mm²

• The cable type and cable-laying method must be appropriate for the application and location.

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Procedure:

DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section10, page69).

2. If the enclosure lid of the DC Connection Unit is closed, remove it as follows: Unscrew all ten screws with a Torx screwdriver (TX25) and remove the enclosure lid carefully forward.

10x10x

3. Set the screws and the enclosure lid aside and store safely.

4. Remove the swivel nut from the cable gland for the communication cable.

5. Remove the two-hole cable support sleeve from the cable gland and insert the cable into the enclosure opening of the two-hole cable support sleeve.

6. Press the two-hole cable support sleeve with the cable into the cable gland and guide the cable to the communication assembly in the DC Connection Unit. Ensure that any unused enclosure openings of the two-hole cable support sleeve are sealed with sealing plugs.

7. Strip 9mm of the cable insulation at maximum.

8. Connect the cable to the 3-pole terminal block according to the circuit diagram, depending on the operating mode (see Section6.5.3, page36). Ensure that the conductors are plugged completely into the terminal points up to their insulation.

9. Stick the 3-pole terminal block with the connected conductors into the MFR slot on the communication assembly in the inverter.

Max. 30V DC

USB

FCC ID: SVF-KP20

IC: 9440A-KP20

ANT.

SPS

MFRBAT

Max. 30V DC

USB

MFRBAT

10. Ensure that the terminal block is securely in place.

11. Ensure that all conductors are correctly connected.

12. Ensure that the conductors sit securely in the terminal points. Tip: To release the conductors, open the terminal points using a suitable tool.

13. Tighten the swivel nut on the cable gland hand-tight.

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6.6 Connecting the Network Cables

DANGER

Danger to life due to electric shock

Overvoltages (e.g. in the case of a flash of lightning) can be further conducted into the building and to other connected devices in the same network via the network cable if there is no overvoltage protection.

• Ensure that all devices in the same network are integrated in the existing overvoltage protection.

• When laying the network cable outdoors, attention must be given to suitable overvoltage protection at the network cable transition from the inverter outdoors to the network inside the building.

• The Ethernet interface of the inverter is classified as "TNV-1" and offers protection against overvoltages up to 1.5kV.

Additionally required material (not included in the scope of delivery):

☐ Network cables ☐ Where required: Field-assembly RJ45 connector.

Cable requirements:

The cable length and quality affect the quality of the signal. Observe the following cable requirements.

☐ Cable type: 100BaseTx ☐ Cable category: Cat5, Cat5e, Cat6, Cat6a or Cat7 ☐ Plug type: RJ45 of Cat5, Cat5e, Cat6 or Cat6a ☐ Shielding: SF/UTP, S/UTP, SF/FTP or S/FTP ☐ Number of insulated conductor pairs and insulated conductor cross-section: at least 2 x 2 x

0.22 mm² ☐ Maximum cable length between two nodes when using patch cables: 50m ☐ Maximum cable length between two nodes when using installation cables: 100m ☐ UV-resistant for outdoor use

Procedure:

DANGER

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section10, page69).

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2. If the enclosure lid of the DC Connection Unit is closed, remove it as follows: Unscrew all ten screws with a Torx screwdriver (TX25) and remove the enclosure lid carefully forward.

10x10x

3. Set the screws and the enclosure lid aside and store safely.

4. Remove the swivel nut from the cable gland for the communication cable.

5. Thread the swivel nut over the network cable.

6. Remove the two-hole cable support sleeve from the cable gland.

7. Remove the sealing plug from one of the enclosure openings of the two-hole cable support sleeve and insert the network cable into the enclosure opening.

8. Press the two-hole cable support sleeve with the cable into the cable gland and guide the network cable to the communication assembly in the DC Connection Unit. Ensure that any unused enclosure openings of the two-hole cable support sleeve are sealed with sealing plugs.

9. When using a self-assembly network cable, assemble the RJ45 connector and connect to the network cable (see connector documentation).

10. Put the RJ45 plug of the cable into one of the network sockets of the communication assembly.

Max. 30V DC

USB

FCC ID: SVF-KP20

IC: 9440A-KP20

ANT.

SPS

11. Ensure that the RJ45 plug is securely in place by pulling slightly on the cable.

12. Tighten the swivel nut on the cable gland hand-tight. This will secure the network cable in place.

13. If the inverter is installed outdoors, install overvoltage protection for all components in the network.

14. If you would like to integrate the inverter into a local network, connect the other end of the network cable to the local network (e.g. via a router).

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Operating manualSTP50-40-BE-en-1244

7 Commissioning

7.1 Commissioning Procedure

This section describes the commissioning procedure and gives an overview of the steps you must perform in the prescribed order.

Procedure See

1. Commission the inverter. Section7.2, page44

2. Establish a connection to the user interface of the inverter. There are various connection options to choose from for this:

• Direct connection via WLAN

• Connection via WLAN in the local network

• Connection via Ethernet in the local network

Section8.1, page50

3. Log into the user interface. Section8.2, page53

4. Select the inverter configuration option. Please note that the SMAGridGuard code (a charge is levied for this code) for changing the grid-relevant parameters must be available after completion of the first ten feed-in hours or installation assistant (see "Application for the SMAGridGuard code" available at www.SMA-Solar.com).

Section7.4, page46

5. Ensure that the country data set has been configured correctly.

Section9.3, page61

6. For PV systems in Italy: Start the self-test. Section7.3, page45

7. Make further inverter settings as needed. Section9, page59

7.2 Commissioning the Inverter

Requirements:

☐ The AC circuit breaker must be correctly rated and mounted. ☐ The inverter must be correctly mounted. ☐ All cables must be correctly connected. ☐ Unused enclosure openings must be sealed tightly with sealing plugs.

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Procedure:

1. Position the enclosure lid of the AC connection unit on the AC connection unit and first tighten the upper-left and lower-right screws, and then the remaining screws crosswise using a Torx screwdriver (TX25) (torque: 6Nm).

10x10x

2. Position the enclosure lid of the DC connection unit on the DC connection unit and first tighten the upper-left and lower-right screws, and then the remaining screws crosswise using a Torx screwdriver (TX25) (torque: 6Nm).

3. Turn the DC load-break switch of the inverter to position I. To do so, first remove the padlock.

4. Switch on the AC circuit breaker.

☑ All three LEDs light up. The start-up phase begins. ☑ All three LEDs go out again after approximately 90seconds. ☑ Depending on the available power, the green LED pulses or is continuously illuminated. The

inverter is feeding in.

✖ The green LED is still flashing?

The conditions for activating feed-in operation are not yet met.

• As soon as the conditions for feed-in operation are met, the inverter starts with feed-in operation and, depending on the available power, the green LED will light up continuously or it will pulse.

✖ The red LED is glowing?

An event has occurred.

• Find out which event has occurred and, if necessary, initiate countermeasures.

7.3 Starting the Self-Test (For Italy Only)

The self-test is only required for inverters to be commissioned in Italy. The Italian standard requires that all inverters feeding into the utility grid are equipped with a self-test function in accordance with CEI0-21. During the self-test, the inverter will consecutively check the reaction times for overvoltage, undervoltage, maximum frequency and minimum frequency.

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The self-test changes the upper and lower disconnection values for each protective function on a linear basis for frequency monitoring and voltage monitoring. As soon as the measured value exceeds the permitted disconnection threshold, the inverter disconnects from the utility grid. In this way, the inverter determines the reaction time and checks itself.

After the self-test has been completed, the inverter automatically switches back to feed-in operation, resets the original disconnection conditions and connects to the utility grid. The test takes approximately threeminutes.

Requirements:

☐ The country data set of the inverter must be set to CEI 0-21 internal.

Procedure:

1. Select the menu Device Configuration.

2. Select [Settings].

3. Select [Starting the Self-Test] in the subsequent context menu.

4. Observe the instructions shown in the dialog and save the report of the self-test, if necessary.

7.4 Selecting a configuration option

After you have logged onto the user interface as Installer, the Configuring the Inverter page opens.

Figure 13: Layout of the Configuring the Inverter page

Position Designation Description

A Device information Provides the following information:

• Device name

• Inverter serial number

• Inverter firmware version

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Position Designation Description

B User information Provides brief information on the listed configuration

options

C Skip configuration Offers the option of skipping the inverter configura-

tion and go directly to the user interface (not recommended)

D Checkbox Allows you to choose not to have the displayed page

displayed again when the user interface is called up again

E Configuration options Provides a selection of the various configuration op-

tions

Procedure:

On the Configuring the Inverter page, different configuration options are available to choose from. Select one of the options and proceed for the selected option as described below. SMA Solar Technology AG recommends carrying out the configuration with the installation assistant. This way, you ensure that all relevant parameters are set for optimal inverter operation.

• Adoption of configuration from a file

• Configuration with the installation assistant (recommended)

• Manual configuration

Accepting the settings

Saving the made settings is indicated by an hourglass symbol on the user interface. If the DC voltage is sufficient, the data is transferred directly to the inverter and accepted. If the DC voltage is too low (e.g. in the evening), the settings are saved, but they cannot be directly transferred to or accepted by the inverter. As long as the inverter has not yet received and accepted the settings, the hourglass symbol will continue to be displayed on the user interface. The settings will be accepted when there is sufficient DC voltage applied and the inverter restarts. As soon as the hourglass symbol appears on the user interface, the settings have been saved. The settings will not be lost. You can log off of the user interface and leave the system.

Adopting the Configuration from a File

You can adopt the inverter configuration from a file. To do this, there must be an inverter configuration saved to a file.

Procedure:

1. Select the configuration option Adopting configuration from a file.

2. Select [Browse...] and select the desired file.

3. Select [Import file].

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Configuring the Installation Assistant (Recommended)

Figure 14: Layout of the installation assistant (example)

Position Designation Description

A Configuration steps Overview of the installation assistant steps. The number of

steps depends on the type of device and the additionally installed modules. The current step is highlighted in blue.

B User information Information about the current configuration step and the

setting options of the configuration step.

C Configuration field You can make settings in this field.

Procedure:

1. Select the configuration option Configuration with Installation Assistant. ☑ The installation assistant will open.

2. Follow the installation assistant steps and make the settings appropriate for your system.

3. For every setting made in a step, select [Save and next]. ☑ In the last step, all made settings are listed in a summary.

4. To save the settings to a file, select [Export a summary] and save the file on your computer,

tablet PC or smartphone.

5. To correct settings you made, select [Back], navigate to the desired step, correct settings and

select [Save and continue].

6. Once all settings are correct, select [Next] in the summary.

☑ The start page of the user interface opens.

Manual configuration

You can configure the inverter manually by setting the desired parameters.

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Procedure:

1. Select the configuration option Manual Configuration. ☑ The Device Parameters menu on the user interface will open and all available

parameter groups of the inverter will be displayed.

2. Select [Edit parameters].

3. Select the desired parameter group. ☑ All available parameters of the parameter group will be displayed.

4. Set the desired parameters.

5. Select [Save all].

☑ The inverter parameters are set.

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8 Using the Inverter User Interface

8.1 Establishing a connection to the user interface

8.1.1 Establishing a direct connection via WLAN

Requirements:

☐ The product must be commissioned. ☐ An end device (e.g. computer, tablet PC or smartphone) must be available. ☐ The respective latest version of one of the following web browsers must be installed: Chrome,

Edge, Firefox, Internet Explorer or Safari. ☐ JavaScript must be enabled in the web browser of the end device. ☐ The SMA Grid Guard code of the Installer must be available for the changing of grid-relevant

settings after completion of the first ten feed-in hours or installation assistant (see "Application

for SMAGridGuard Code" at www.SMA-Solar.com). A charge is levied for this code.

Inverter SSID and IP address and necessary passwords

• Inverter SSID in WLAN: SMA[serial number] (e.g. SMA0123456789)

• Standard WLAN password (usable until completion of the configuration by means of the installation assistant or prior to the end of the first tenfeed-in hours): SMA12345

• Device-specific WLAN password (usable for initial configuration to completion of the first tenfeed-in hours): see WPA2-PSK on the type label of the inverter or on the back of the manual included in the delivery

• Standard IP inverter address for a direct connection via WLAN outside of a local network: 192.168.12.3

Importing and exporting files with end devices having an iOS operating system is not possible.

For technical reasons, importing and exporting files (e.g. importing an inverter configuration, saving the current inverter configuration or exporting events) is not possible with mobile end devices having an iOS operating system.

• Use an end device that does not have an iOS operating system for importing and exporting files.

The procedure can be different depending on the end devices. If the procedure described does not apply to your end device, establish the direct connection via WLAN as described in the manual of your end device.

Procedure:

1. If your end device has a WPS function:

• Activate the WPS function on the inverter. To do this, tap twice in succession on the enclosure lid of the DC connection unit next to the LEDs.

☑ The blue LED flashes quickly for approx. two minutes. The WPS function is active.

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• Activate the WPS on your end device.

☑ The connection with your end device will be established automatically. It can take

up to 20seconds for this connection to be established.

2. If your end device has not a WPS function:

• Search for WLAN networks with your end device.

• Select the SSID of the inverter SMA[serial number] in the list with the found WLAN networks.

• Enter the inverter WLAN password. Within the first tenfeed-in hours and prior to completing the configuration by means of the installation assistant, you must use the standard WLAN password SMA12345. After the first tenfeed-in hours or after completing the configuration by means of the installation assistant, you must use the device-specific WLAN password (WPA2-PSK) of the inverter. You find the WLAN password (WPA2-PSK) on the type label.

3. Enter the IP address 192.168.12.3 or, if your device supports mDNS services, SMA[serial number].local or https://SMA[serial number] in the address line of the web browser and press the enter key.

Web browser signals a security vulnerability

After the IP address has been confirmed by pressing the enter key, a message might appear indicating that the connection to the user interface of the inverter is not secure. SMA Solar Technology AG guarantees that calling up the user interface is secure.

• Continue loading the user interface.

☑ The login page of the user interface opens.

8.1.2 Establishing a Connection via WLAN in the Local Network

New IP address for connecting with a local network

If the product is connected to a local network (e.g. via a router), the product will receive a new IP address. Depending on the type of configuration, the new IP address will be assigned automatically by the DHCP server (router) or manually by you. Upon completion of the configuration, the product can only be reached via the following access addresses:

• Generally applicable access address: IP address manually assigned or assigned by the DHCP server (router) (identification via SMAConnectionAssist, network scanner software or network configuration of the router).

• Access address for Apple and Linux systems: SMA[serial number].local (e.g. SMA0123456789.local)

• Access address for Windows and Android systems: https://SMA[serial number] (e.g. https://SMA0123456789)

Requirements:

☐ The product must be commissioned. ☐ The product must be integrated into the local network. Tip: There are various methods of

integrating the product into the local network with the aid of the installation assistant.

☐ The end device must be in the same local network as the product.

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☐ An end device (e.g. computer, tablet PC or smartphone) must be available. ☐ JavaScript must be enabled in the web browser of the end device. ☐ The respective latest version of one of the following web browsers must be installed: Chrome,

Edge, Firefox, Internet Explorer or Safari.

☐ The SMA Grid Guard code of the Installer must be available for the changing of grid-relevant

settings after completion of the first ten feed-in hours or installation assistant (see "Application for SMAGridGuard Code" at www.SMA-Solar.com). A charge is levied for this code.

Importing and exporting files with end devices having an iOS operating system is not possible.

• Use an end device that does not have an iOS operating system for importing and exporting files.

Procedure:

1. Enter the IP address of the inverter in the address bar of the web browser.

Web browser signals a security vulnerability

• Continue loading the user interface.

☑ The login page of the user interface opens.

8.1.3 Establishing a Connection via Ethernet in the local network

New IP address for connecting with a local network

• Access address for Apple and Linux systems: SMA[serial number].local (e.g. SMA0123456789.local)

• Access address for Windows and Android systems: https://SMA[serial number] (e.g. https://SMA0123456789)

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Requirements:

☐ The product must be connected to the local network via a network cable (e.g. via a router). ☐ The product must be integrated into the local network. Tip: There are various methods of

integrating the product into the local network with the aid of the installation assistant. ☐ An end device (e.g. computer, tablet PC or smartphone) must be available. ☐ The end device must be in the same local network as the product. ☐ The respective latest version of one of the following web browsers must be installed: Chrome,

Edge, Firefox, Internet Explorer or Safari. ☐ The SMA Grid Guard code of the Installer must be available for the changing of grid-relevant

settings after completion of the first ten feed-in hours or installation assistant (see "Application

for SMAGridGuard Code" at www.SMA-Solar.com). A charge is levied for this code.

Procedure:

1. Open the web browser of your end device, enter the IP address of the inverter in the address line of the web browser and press the enter key.

Web browser signals a security vulnerability

• Continue loading the user interface.

☑ The login page of the user interface opens.

8.2 Logging In and Out of the User Interface

After a connection to the user interface of the inverter has been established, the login page opens. Log onto the user interface as described below.

Usage of cookies

For the correct display of the user interface, cookies are required. The cookies are used for convenience only. By using this user interface you agree to the placement of cookies.

Password for PV systems that are registered in a communication product

The password for the user group Installer is also the system password. If you assign a password for the user group Installer via the user interface of the inverter, the password must match the PV system password. If the new password for logging onto the user interface does not match the system password in the communication product, the inverter cannot be reached by the communication product.

• A uniform password is assigned for all Speedwire devices in the PV system.

Procedure:

1. In the drop-down list Language, select the desired language.

2. In the User group drop-down list, select the entry Installer or User.

3. In the New password field, enter a new password for the selected user group.

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4. In the Repeat password field, enter the new password again.

5. Select Login.

☑ The Configuring the Inverter page opens.

1. In the drop-down list Language, select the desired language.

2. In the User group drop-down list, select the entry Installer or User.

3. Enter the password in the field Password.

4. Select Login.

☑ The start page of the user interface opens.

Log Out as the User or Installer

1. On the right-hand side of the menu bar, select the menu User Settings.

2. In the subsequent context menu, select [Logout].

☑ The login page of the user interface opens. The logout was successful.

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8.3 Start Page Design of the User Interface

Figure 15: Start page design of the user interface (example)

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Position

Designation Description

A Menu Provides the following functions:

• Home Opens the user interface homepage

• Instantaneous values Current measured values of the inverter

• Device Parameters The various operating parameters of the inverter can be viewed and

configured here depending on the user group.

• Events All events that have occurred in the selected time period are

displayed here. The event types are Information, Warning and Error. Currently existing events of the types Error and Warning will be additionally displayed in the Device status viewlet. However, only the higher-priority event is displayed. If, for example, there is a Warning and an Error present at the same time, only the Error will be displayed.

• Device configuration Various settings for the inverter can be made here. The selection

available is dependent on which user group you are logged in as and the operating system of the device with which the user interface has been called up.

• Data You will find all data that is saved in the internal memory of the

inverter or on an external storage medium on this page.

B User settings Provides the following functions, depending on the user group logged in:

• Starting the installation assistant

• SMA Grid Guard login

• Logout

C Help Provides the following functions:

• Displaying information on Open Source licenses used

• Link to the website of SMA Solar Technology AG

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Position

Designation Description

D Status bar Displays the following information:

• Inverter serial number

• Inverter firmware version

• IP address of the inverter within the local network and/or IP address of the inverter during WLAN connection

• With WLAN connection: Signal strength of WLAN connection

• User group logged in

• Date and device time of the inverter

E Current

power and current consumption

Temporal progression of the PV power and the power consumption of the household over the selected time period. Please note, the power consumption will only be displayed if an energy meter is installed in the PV system.

F Status dis-

play

The various areas display information on the current status of the PV system.

• Device status Displays whether the inverter is currently in a fault-free operating

state or whether there is an Error or Warning present.

• Current power Displays the power currently being generated by the inverter.

• Current consumption Displays the current consumption of the household if an energy

meter is installed in the PV system.

• Yield Displays the energy yield of the inverter.

• Consumption Displays the energy consumption of the household if an energy

meter is installed in the PV system.

• Feed-in management Displays whether the inverter is currently limiting its active power.

• Irradiation / wind speed Depending on the connected sensors, displays the current solar

irradiation and/or wind speed.

• Temperature measurement Depending on the connected sensors, displays the current

temperature of the PV modules and/or the ambient temperature.

8.4 Displaying and Downloading the Stored Data

If an external storage device is plugged in, you can display and download the stored data.

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Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface (see Section8.2, page53).

3. Select the menu Data.

4. Select the folder Data.

5. To call up the data, select the respective folder and click on the required file.

6. To download the data, select the data type to be exported in the drop-down list. Then apply the time filter and select Data export.

8.5 Changing the Password

The password for the inverter can be changed for both user groups. Furthermore, the user group

Installer can change the password for the user group User as well as its own password.

PV systems registered in a communication product

With PV systems that are registered in a communication product (e.g. SunnyPortal, ClusterController), you can also assign a new password for the user group Installer via the communication product. The password for the user group Installer is also the system password. If you assign a password for the user group Installer via the user interface of the inverter that does not correspond to the system password in the communication product, the inverter can no longer be reached by the communication product.

• Ensure that the password for the user group Installer is the same as the system password in the communication product.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface (see Section8.2, page53).

3. Call up the menu Device Parameters.

4. Select [Edit parameters].

5. In the parameter group User Rights > Access Control change the password of the desired user group.

6. Select [Save all] to save the changes.

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9 Configuration of the Inverter

9.1 Changing Operating Parameters

The operating parameters of the inverter are set to certain values by default. You can change the operating parameters to optimize the performance of the inverter.

This section describes the basic procedure for changing operating parameters. Always change operating parameters as described in this section. Some function-sensitive parameters can only be viewed by qualified persons and can only be changed by qualified persons by entering the personal SMA Grid Guard code.

Requirements:

☐ The changes to the grid-relevant parameters must be approved by the grid operator. ☐ When changing grid-relevant parameters, the SMAGridGuardcode must be available (see

"Application for SMAGridGuard Code" at www.SMA-Solar.com). A charge is levied for this code.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface (see Section8.2, page53).

3. Call up the menu Device Parameters.

4. Select [Edit parameters].

5. Log in using the SMA Grid Guard code to change those parameters designated by a lock (only for installers):

• Select the menu User Settings (see Section8.3, page55).

• In the subsequent context menu, select [SMA GridGuard login].

• Enter the SMA Grid Guard code and select [Login].

6. Expand the parameter group that contains the parameter which is to be configured.

7. Change the desired parameters.

8. Select [Save all] to save the changes.

☑ The inverter parameters are set.

Accepting the settings

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9.2 Starting the Installation Assistant

The installation assistant leads you step-by-step through the steps necessary for the initial configuration of the inverter.

Layout of the installation assistant

Figure 16: Layout of the installation assistant (example)

Position Designation Description

A Configuration steps Overview of the installation assistant steps. The number of

steps depends on the type of device and the additionally installed modules. The current step is highlighted in blue.

B User information Information about the current configuration step and the

setting options of the configuration step.

C Configuration field You can make settings in this field.

Requirement:

☐ When configuring after completion of the first tenfeed-in hours or after exiting the installation

assistant, the SMA Grid Guard code must be available in order to change the grid-relevant parameters (see "Application for SMAGridGuard Code" at www.SMA-Solar.com). A charge is levied for this code.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log in as Installer.

3. Select the menu User Settings (see Section8.3, page55) on the start page of the user interface.

4. In the context menu, select [Start the installation assistant].

☑ The installation assistant will open.

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9.3 Configuring the Country Data Set

By default, the inverter is set to a universally valid country data set. You can adjust the country data set for the installation site retroactively.

The country data set must be set correctly.

If you select a country data set which is not valid for your country and purpose, it can cause a disturbance in the PV system and lead to problems with the grid operator. When selecting the country data set, you must always observe the locally applicable standards and directives as well as the properties of the PV system (e.g. PV system size, grid-connection point).

• If you are not sure which country data set is valid for your country or purpose, contact your grid operator for information on which country data set is to be configured.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Procedure:

• In the parameter group Grid monitoring > Grid monitoring select the parameter Set country standard and set the required country data set.

9.4 Changing the Operating Mode of the Multifunction Relay

The default operating mode of the multifunction relay is Fault indication (FltInd) . If you decide to use another operating mode and have established the correct electrical connection for this operating mode and the associated connection variant, you will have to change the operating mode of the multifunction relay and make other settings, if necessary.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Procedure:

1. Call up the menu Device Parameters.

2. Select [Edit parameters].

3. In the parameter group Device > Multifunction relay > Operating mode select the parameter Operating mode of multifunction relay or Mlt.OpMode and set the desired operating mode.

4. Once you have set the operating mode Self-consumption or SelfCsmp, you can configure other settings:

• In the parameter group Device > Multifunction relay > Self-consumption >

Minimum On power select the parameter Minimum On power for MFR selfconsumption or Mlt.MinOnPwr and set the desired value. This will configure the

power threshold from which a load is to be activated.

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• In the parameter group Device > Multifunction relay > Self-consumption >

Minimum power On time select the parameter Minimum power On time, MFR selfconsumption or Mlt.MinOnPwrTmm and set the desired value. This will configure the

minimum time for which the power must have exceeded the minimum switch-on power threshold in order to trip activation of the load.

• In the parameter group Device > Multifunction relay > Self-consumption >

Minimum On power select the parameter Minimum On time for MFR selfconsumption or Mlt.MinOnTmm and set the desired value. This will configure the

minimum time for which the load remains activated.

5. If you have set the operating mode Control via communication or ComCtl, in the parameter group Device > Multifunction relay > Control via communication > Status select the parameter Status of MFR with control via communication or Mlt.ComCtl.Sw and set the desired value. This determines whether the multifunction relay can be controlled via a communication product.

6. If you have set the operating mode Battery bank or BatCha, make further settings:

• In the parameter group Device > Multifunction relay > Battery bank > Minimum On

power select the parameter Minimum On power for MFR battery bank or Mlt.BatCha.Pwr and set the desired value. This will configure the power threshold from

which the battery is to be charged.

• In the parameter group Device > Multifunction relay > Battery bank > Minimum

time before reconnection select the parameter Minimum time before reconnection of MFR battery bank or Mlt.BatCha.Tmm and set the desired value. This will

configure the minimum time which must elapse after charging the battery before the battery can be charged again.

7. Select [Save all] to save the changes.

9.5 Configuring the ModbusFunction

The Modbus interface is deactivated by default and the communication ports 502 set. In order to access SMA invertes with SMA Modbus® or SunSpec® Modbus®, the Modbus interface

must be activated. After activating the interface, the communication ports of both IP protocols can be changed. For information on commissioning and configuration of the Modbus interface, see the Technical Information "SMAModbus® Interface" or in the Technical Information "SunSpec® Modbus® Interface" at www.SMA-Solar.com.

For information on which Modbus registers are supported, see the Technical Descriptions "SMA Modbus® Interface" or "SunSpec® Modbus® Interface" at www.SMA-Solar.com.

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Data security during activated Modbus interface

If you activate the Modbus interface, there is a risk that unauthorized users may access and manipulate the data or devices in your PV system.

• Take appropriate protective measures, such as: – Set up a firewall. – Close unnecessary network ports. – Only enable remote access via VPN tunnel. – Do not set up port forwarding at the communication port in use. – In order to deactivate the Modbus interface, reset the inverter to default settings or

deactivate the activated parameter again.

Procedure:

• Activate the Modbus interface and adjust the communication ports if necessary (see the technical information "SMAModbus® Interface" or "SunSpec® Modbus® Interface" at www.SMA-Solar.com).

9.6 Setting the Tripping Threshold of the Residual-Current Device

If a residual-current device with a tripping threshold of <500mA is used, you must change the tripping threshold in the inverter accordingly. For further information, see the Technical Information “"Leading Leakage Currents"” at www.SMA-Solar.com).

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

• In the parameter group Device > Inverter, select the parameter RCD adjustment and set it to the tripping threshold of the residual-current device that is used.

9.7 Configuring Feed-In Management

If required by the grid operator, the inverter can provide grid management services. You can configure these via the inverter feed-in management. Coordinate the configuration of the feed-in management with your grid operator beforehand.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface as an Installer.

3. On the right-hand side of the menu bar, select the menu User Settings (see Section8.3 "Start Page Design of the User Interface", page55).

4. In the context menu, select [Starting the installation assistant].

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5. Select [Save and next] until you reach the Feed-in management step.

6. Configure the feed-in management as desired.

9.8 Setting SMA OptiTrac Global Peak

For partially shaded PV modules, you should set the interval at which the inverter is to optimize the MPP of the PV system. If you do not want to use SMAOptiTracGlobalPeak feature, you can deactivate the feature.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Procedure:

• In the parameter group DC-side > DC settings > OptiTrac Global Peak, set the parameter Cycle time of the OptiTrac Global Peak algorithm and set the required time interval. The

ideal time interval is usually six minutes. This value should only be increased if the shading situation changes extremely slowly.

☑ The inverter optimizes the MPP of the PV system at the predetermined time interval.

• In order to deactivate the SMAOptiTracGlobalPeak feature, in the parameter group DC-

side > DC settings > OptiTrac Global Peak, set the parameter OptiTrac Global Peak switched on to Off.

9.9 Activating the Receipt of Control Signals (Only for Italy)

In order for PV systems in Italy to receive control commands from the grid operator, set the following parameters.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Parameter Value/range Resolution Default

Application ID 0 to 16384 1 16384 GOOSE-Mac address 01:0C:CD:01:00:00 to

01:0C:CD:01:02:00

1 01:0C:CD:01:00:00

Procedure:

1. Select the parameter group External communication > IEC 61850 configuration.

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2. In the field Application ID, enter the application ID of the grid operator gateway. You will receive this value from your grid operator. You can enter a value between 0 and 16384. The value 16384 indicates "deactivated".

3. In the field GOOSE-Mac address, enter the MAC address of the grid operator gateway from which the inverter is to receive the control commands. You will receive this value from your grid operator.

☑ The receipt of control signals from the grid operator is activated.

9.10 Activating String-Failure Detection

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface as an Installer.

3. On the right-hand side of the menu bar, select the menu User Settings (see Section8.3 "Start Page Design of the User Interface", page55).

4. In the context menu, select [Starting the installation assistant].

5. Select [Save and next] until you reach the String configuration step.

6. Activate string-failure detection and configure it as required.

9.11 Saving the Configuration in a File

You can save the current configuration of the inverter in a file. You can use this file as a data backup for this inverter and then import this file into this inverter again or another inverter from the same type or device family to configure the inverter. When saving, only the device parameters will be saved, not any passwords.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface (see Section8.2, page53).

3. Select the menu Device Configuration.

4. Select [Settings].

5. In the context menu, select [Saving the configuration in a file].

6. Follow the instructions in the dialog.

9.12 Adopting a Configuration from a File

To configure the inverter, you can adopt the configuration from a file. To be able to do this, you must first save the configuration of another inverter from the same type or device family in a file (see Section9.11 "Saving the Configuration in a File", page65). When saving, only the device parameters will be adopted, not any passwords.

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Requirements:

☐ The SMA Grid Guard code must be available (see "Application for SMAGridGuard Code"

at www.SMA-Solar.com). A charge is levied for this code.

☐ Changes to grid-relevant parameters must be approved by the responsible grid operator.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface as an Installer.

3. Select the menu Device Configuration.

4. Select [Settings].

5. In the context menu, select [Adopting the configuration from a file].

6. Follow the instructions in the dialog.

9.13 Switching the Dynamic Power Display Off

As standard, the inverter signals its power dynamically via the pulsing of the green LED. When doing so, the LED flashes on and off uniformly or is permanently lit at full power. The various gradations are related here to the set active power limit of the inverter. If this display is not desired, switch this function off in accordance with the following procedure. Once this has been done, the green LED is lit permanently to signalize feed-in operation.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Procedure:

• In the parameter group Device > Operation, select the parameter Dynamic power display via green LED and set this to Off.

9.14 Switching WLAN On and Off

The inverter is equipped with an activated WLAN interface as standard. If you do not want to use WLAN, you can switch the WLAN function off and switch it on again whenever needed. In doing so, you can switch the WLAN direct connection and the WLAN connection in the local network on independently of each other.

Switching on the WLAN function only possible via Ethernet connection

If you switch off both the WLAN function for the direct connection and for the connection in the local network, access to the inverter user interface and therefore reactivation of the WLAN interface is only possible via an Ethernet connection.

The basic procedure for changing operating parameters is explained in another section (see Section9.1 "Changing Operating Parameters", page59).

Switching WLAN Off

If you would like to switch the WLAN function off completely, you must switch off both the direct connection and the connection in the local network.

9 Configuration of the Inverter

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 67

Procedure:

• To switch off the direct connection in the parameter group PV system communication > WLAN, select the parameter Soft-access-point is turned on and set this to No.

• To switch off the connection in the local network in the parameter group PV system communication > WLAN, select the parameter WLAN is turned on and set this to No.

Switching WLAN On

If you have switched the WLAN function for direct connection or for connection in the local network off, you can switch the WLAN function back on in accordance with the following procedure.

Requirement:

☐ If the WLAN function was previously switched off completely, the inverter must be connected

to a computer or router via Ethernet.

Procedure:

• To switch on the WLAN direct connection, in the parameter group PV system communication > WLAN, select the parameter Soft-access-point is turned on and set this

to Yes.

• To switch on the WLAN connection in the local network, in the parameter group System

communication > WLAN, select the parameter WLAN is turned on and set this to Yes.

9.15 Activate WPS Function

The WPS function can be used for different purposes:

• Automatic connection to a network (e.g. via router)

• Direct connection between the product and an end device

Depending on the intended application of the WPS function, the procedure for activation will vary.

Activating WPS function for automatic connection to a network

Requirements:

☐ WLAN must be activated in the product. ☐ WPS must be activated on the router.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log in as Installer.

3. Start the installation assistant (see Section9.2, page60).

4. Select Network configuration.

5. Select WPS for WLAN network button in the WLAN tab.

6. Select Activate WPS.

7. Select Save and next and exit the installation assistant.

☑ The WPS function is activated and the automatic connection to the network can be

established.

9 Configuration of the Inverter

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1268

Activating the WPS function for direct connection to the end device.

• Activate the WPS function on the inverter. To do this, tap twice in succession on the enclosure lid of the DC connection unit next to the LEDs.

☑ The blue LED flashes quickly for approx. two minutes. The WPS function is active.

10 Disconnecting the Inverter from Voltage Sources

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 69

10 Disconnecting the Inverter from Voltage Sources

Prior to performing any work on the inverter, always disconnect it from all voltage sources as described in this section. Always adhere to the prescribed sequence.

NOTICE

Destruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 1000V or higher.

Procedure:

1. Disconnect the AC circuit breaker and secure it against reconnection.

2. Set the DC load-break switch of the inverter to position O.

3. Secure the DC load-break switch against reconnection using a suitable padlock.

4. If the multifunction relay is used, switch off any supply voltage to the load.

5. Wait until the LEDs have gone out.

6. Use a current clamp to ensure that no current is present in the DC cables.

<0.5A

7. Release and remove the DC connectors. To do this, insert a flat-blade screwdriver or an angled screwdriver (blade width:3.5mm) into one of the slide slots and pull the DC connectors out in a downward direction. Do not pull on the cable.

8. Ensure that no voltage is present at the DC inputs on the inverter using a suitable measuring device.

<30V

10 Disconnecting the Inverter from Voltage Sources

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1270

9. Unscrew all ten screws of the enclosure lid of the AC connection unit using a Torx screwdriver (TX25) and remove the enclosure lid towards the front.

10x10x

10. Set the screws and the enclosure lid aside and store safely.

11. Ensure there is no voltage on the AC terminal block between L1 and N, L2 and N, and L3 and N using a suitable measuring device. To do so, insert the test probe (maximum diameter: 2.5mm) into the measuring points of the respective terminal blocks.

0.000.00

12. Ensure there is no voltage on the AC terminal block between L1 and PE, L2 and PE, and L3 and PE using a suitable measuring device. To do so, insert the test probe (maximum diameter: 2.5mm) into the measuring points of the respective terminal blocks.

0.000.00

11 Cleaning the Inverter

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 71

11 Cleaning the Inverter

NOTICE

Damage to the type label due to the use of cleaning agents

• If the inverter is dirty, clean the enclosure, the enclosure lid, the type label and the LEDs with a damp cloth and clear water only.

12 Troubleshooting

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1272

12 Troubleshooting

12.1 Event Messages

Event number Message, cause and corrective measures

101

Grid fault

The grid voltage or grid impedance at the connection point of the inverter is too high. The inverter has disconnected from the utility grid.

Corrective measures:

• Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.

If the grid voltage is outside the permissible range due to local grid conditions, contact the grid operator. The grid operator must agree with an adjustment of the voltage at the feed-in point or with a change of the monitored operating limits.

If the grid voltage is permanently within the permissible range and this message is still displayed, contact the Service (see Section16 "Contact", page102).

301

Grid fault

The ten-minute average value of the grid voltage is no longer within the permissible range. The grid voltage or grid impedance at the connection point is too high. The inverter disconnects from the utility grid to maintain power quality.

Corrective measures:

• During the feed-in operation, check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.

If the grid voltage is permanently within the permissible range and this message is still displayed, contact the Service (see Section16 "Contact", page102).

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Operating manual STP50-40-BE-en-12 73

Event number Message, cause and corrective measures

401

Grid fault

The inverter has disconnected from the utility grid. A stand-alone grid or a very large change in the power frequency was detected.

Corrective measures:

• Check the grid connection for significant short-term frequency fluctuations.

501

Grid fault

The power frequency is not within the permissible range. The inverter has disconnected from the utility grid.

Corrective measures:

• If possible, check the power frequency and observe how often fluctuations occur.

If fluctuations occur frequently and this message is displayed often, contact the grid operator and request approval to change the operating parameters of the inverter.

If the grid operator gives his approval, discuss any changes to the operating parameters with Service (see Section16 "Contact", page102).

601

Grid fault

The inverter has detected an excessively high proportion of direct current in the grid current.

Corrective measures:

• Check the grid connection for direct current.

• If this message is displayed frequently, contact the grid operator and check whether the monitoring threshold on the inverter can be raised.

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Operating manualSTP50-40-BE-en-1274

Event number Message, cause and corrective measures

801

Waiting for grid voltage > Grid failure > Check AC circuit breaker

The AC cable is not correctly connected or the country data set is not correctly configured.

Corrective measures:

• Make sure that the circuit breaker is switched on.

• Ensure that the AC cable is not damaged and that it is connected correctly.

• Ensure that the country data set has been configured correctly.

• Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.

If the grid voltage is permanently within the permissible range and this message is still displayed, contact the Service (see Section16 "Contact", page102).

901

PE conn. missing > Check connection

The grounding conductor is not correctly connected.

Corrective measures:

• Ensure that the grounding conductor is correctly connected.

3401 to 3407

DC overvoltage > Disconnect generator

Overvoltage at the DC input. This can destroy the inverter. This message is signalized additionally by rapid flashing of the LEDs.

Corrective measures:

• Immediately disconnect the inverter from all voltage sources (see Section10, page69).

• Check whether the DC voltage is below the maximum input voltage of the inverter. If the DC voltage is below the maximum input voltage of the inverter, reconnect the DC connectors to the inverter.

• If the DC voltage exceeds the maximum input voltage of the inverter, ensure that the PV array has been correctly rated or contact the installer of the PV array.

• If this message is repeated frequently, contact the Service (see Section16 "Contact", page102).

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SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 75

Event number Message, cause and corrective measures

3501

Insulation failure > Check generator

The inverter has detected a ground fault in the PV array.

Corrective measures:

• Check the PV system for ground faults (see Section12.4, page87).

3701

Resid.curr.too.high > Check generator

The inverter has detected a residual current due to temporary grounding of the PV array.

Corrective measures:

• Check the PV system for ground faults (see Section12.4, page87).

3801 to 3805

DC overcurrent > Check generator

Overcurrent at the DC input. The inverter briefly interrupts feed-in operation.

Corrective measures:

• If this message is displayed frequently, ensure that the PV array has been correctly rated and wired.

6002 to 6412

Self diagnosis > Interference device

The cause must be determined by the Service.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

6502

Self-diagnosis > Overtemperature

The inverter has switched off due to excessive temperature.

Corrective measures:

• Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.

• Ensure that the inverter has sufficient ventilation.

• Ensure that the ambient temperature +35°C has not been exceeded.

• Ensure that the inverter is not exposed to direct solar irradiation.

6512

Minimum operating temperature not reached

The inverter will only recommence grid feed-in once the temperature has reached at least −25°C.

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Operating manualSTP50-40-BE-en-1276

Event number Message, cause and corrective measures

6603 to 6604

Self-diagnosis > Overload

The cause must be determined by the Service.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

6701 to 6702

Communication disturbed

Error in the communication processor, the inverter continues feeding in, however. The cause must be determined by the Service.

Corrective measures:

• If this message is displayed frequently, contact the Service (see Section16 "Contact", page102).

7102

Parameter file not found or defective

The parameter file was not found or is defective. Loading the parameter file has failed. The inverter continues feeding power into the grid.

Corrective measures:

• Copy the parameter file to the correct folder again.

7105

Param. setting failed

Parameters could not be set using the memory card. The inverter continues feeding power into the grid.

Corrective measures:

• Ensure that the parameters are set correctly.

• Ensure that the SMA Grid Guard code is available.

7106

Update file defect.

The update file is defective. The update failed. The inverter continues feeding power into the grid.

7110

No update file found

No new update file was found on the SD memory card. The update failed. The inverter continues feeding power into the grid.

7112

Update file successfully copied

7113

The memory card is full or write-protected

7201 to 7202

Data storage not possible

12 Troubleshooting

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 77

Event number Message, cause and corrective measures

7303

Update main CPU failed

The cause must be determined by the Service.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

7320

The device with serial number [xx] was successfully updated to firmware version [xxx].

The firmware update was completed successfully.

7330

Condition test failed

The testing of the update conditions was not successful. The firmware update package is not suitable for this inverter.

7331

Update transport started

Update file is being copied.

7332

Update transport successful

Update file was copied successfully to the inverter's internal memory.

7333

Update transport failed

Update file could not be copied to the inverter's internal memory. In the event of connection with the inverter via WLAN, a poor connection quality can be the cause.

Corrective measures:

• Retry update.

• For WLAN connection: Improve the WLAN connection quality (e.g. via WLAN repeater) or establish connection with the inverter via Ethernet.

• If this message is displayed again, contact the Service (see Section16 "Contact", page102).

7341

Update Bootloader

The inverter is performing a bootloader update.

7342

Update Bootloader failed

The bootloader update failed.

Corrective measures:

• Retry update.

• If this message is displayed again, contact the Service (see Section16 "Contact", page102).

12 Troubleshooting

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1278

Event number Message, cause and corrective measures

7347

Incompatible file

The configuration file is not suitable for this inverter.

Corrective measures:

• Ensure that the selected configuration file is suitable for this inverter.

• Retry import.

7348

Incorrect file format

The configuration file is not of the required format or is damaged.

Corrective measures:

• Ensure that the selected configuration file is of the required format and is not damaged.

• Retry import.

7350

Transfer of a configuration file has started

The configuration file is being transferred.

7351

Update WLAN

The inverter is updating the WLAN module.

7352

Update of WLAN not successful

The update of the WLAN module failed.

Corrective measures:

• Retry update.

• If this message is displayed again, contact the Service (see Section16 "Contact", page102).

7353

Update time zone database

The inverter is updating the time zone database.

7354

Update of time zone database not successful

The update of the time zone database failed.

Corrective measures:

• Retry update.

• If this message is displayed again, contact the Service (see Section16 "Contact", page102).

7355

Update WebUI

The inverter is updating the inverter user interface.

12 Troubleshooting

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 79

Event number Message, cause and corrective measures

7356

Update of the WebUI not successful

The update of the inverter user interface failed.

Corrective measures:

• Retry update.

• If this message is displayed again, contact the Service (see Section16 "Contact", page102).

7500 to 7501

Fan fault > Check inverter electronic and fan

7619

Communication fault with meter unit > Check communication to meter

The inverter is not receiving any data from the energy meter.

Corrective measures:

• Ensure that the energy meter is correctly integrated into the same network as the inverter (see energy meter manual).

• For WLAN connection: Improve the WLAN connection quality (e.g. via WLAN repeater) or connect the inverter with the DHCP server (router) via Ethernet.

7702

Interference device

The cause must be determined by the Service.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

8003

Active power limited derating

The inverter has reduced its power output for more than ten minutes due to excessive temperature.

Corrective measures:

• Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.

• Ensure that the inverter has sufficient ventilation.

• Ensure that the ambient temperature +35°C has not been exceeded.

• Ensure that the inverter is not exposed to direct solar irradiation.

12 Troubleshooting

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1280

Event number Message, cause and corrective measures

8101 to 8104

Communication disturbed

The cause must be determined by the Service.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

9002

SMA Grid Guard code invalid

The SMAGridGuard code entered is incorrect. The operating parameters are still protected and cannot be changed.

Corrective measures:

• Enter the correct SMAGridGuard code.

9003

Grid parameter locked

Changes to the grid parameters are now blocked. In order to be able to make changes to the grid parameters, from now on you must log in using the SMA Grid Guard code.

9005

Changing of grid parameters not possible > Ensure DC supply

This error can have the following causes:

• The parameters to be changed are protected.

• The DC voltage at the DC input is not sufficient to run the main CPU.

Corrective measures:

• Enter the SMA Grid Guard code.

• Ensure that at least the DC start voltage is available (green LED is flashing, pulsing or glowing).

9007

Abort self-test

The self-test (Italy only) was terminated.

Corrective measures:

• Ensure that the AC connection is correct.

• Restart the self-test.

10108

Time adjusted / old time

10109

Time adjusted / new time

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SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 81

Event number Message, cause and corrective measures

10110

Time synchronization failed: |xx|

No time information could be called up from the set NTP server.

Corrective measures:

• Ensure that the NTP server was configured correctly.

• Ensure that the inverter is integrated into a local network with Internet connection.

10118

Parameter upload complete

The configuration file was loaded successfully.

10248

[Interface]: network busy

The network is busy. Data exchange between the devices is not at an optimum and is greatly delayed.

Corrective measures:

• Increase the query intervals.

• If necessary, reduce the number of devices in the network.

10249

[Interface]: network overloaded

The network is overloaded. There is no data exchange between the devices.

Corrective measures:

• Reduce the number of devices in the network.

• If necessary, increase the data query intervals.

10250

[Interface]: package error rate [ok / high]

The package error rate has changed. If the package error rate is high, the network is overloaded or the connection to the network switch or DHCP server (router) is disturbed.

Corrective measures if the package error rate is high:

• Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.

• If necessary, increase the data query intervals.

• If necessary, reduce the number of devices in the network.

12 Troubleshooting

SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1282

Event number Message, cause and corrective measures

10251

[Interface]: communication status goes to [OK / Warning / Error / Not connected]

The communication status to the network switch or DHCP server (router) has changed. An additional error message may be displayed.

10252

[Interface]: communication disrupted

There is no valid signal on the network line.

Corrective measures:

• Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.

• Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

10253

[Interface]: connection speed goes to [100Mbit / 10Mbit]

The data transfer rate has changed. The cause for the status [10 Mbit] can be a defective plug, a defective cable or the pulling or plugging of the network connector.

Corrective measures if the status is [10 Mbit]:

• Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.

• Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

10254

[Interface]: duplex mode goes to [Full / Half]

The duplex mode (data transfer mode) has changed. The cause for the status [Half] can be a defective plug, a defective cable or the pulling or plugging of the network connector.

Corrective measures if the status is [Half]:

• Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.

• Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

12 Troubleshooting

SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 83

Event number Message, cause and corrective measures

10255

[Interface]: Network load OK

The network load has returned to a normal range after being busy.

10282

[User group]-Login via [protocol] locked

After several incorrect login attempts, login has been blocked for a limited time. In this case, the User login will be blocked for 15minutes, the GridGuard login for 12hours.

Corrective measures:

• Wait until the given time has expired and then retry login.

10283

WLAN module faulty

The WLAN module integrated in the inverter is defective.

Corrective measures:

• Contact the Service (see Section16 "Contact", page102).

10284

No WLAN connection possible

The inverter does not currently have a WLAN connection to the selected network.

Corrective measures:

• Ensure that the SSID, the WLAN password and the encryption method have been entered correctly. The encryption method is specified by your WLAN router or WLAN Access Point and can be changed there.

• Ensure that the WLAN router or WLAN Access Point is in range and is signalizing correct operation.

• If this message is displayed often, improve the WLAN connection by using a WLAN repeater.

10285

WLAN connection established

Connection to the selected WLAN network has been established.

12 Troubleshooting

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Operating manualSTP50-40-BE-en-1284

Event number Message, cause and corrective measures

10286

WLAN connection lost

The inverter has lost WLAN connection to the selected network.

Corrective measures:

• Ensure that the WLAN router or WLAN Access Point is still active.

• Ensure that the WLAN router or WLAN Access Point is in range and is signalizing correct operation.

• If this message is displayed often, improve the WLAN connection by using a WLAN repeater.

10339

Webconnect enabled

10340

Webconnect disabled

10341

Webconnect error: no connection

10343

Webconnect error: Default gateway not configured

10344

Webconnect error: DNS server not configured

10345

Webconnect error: No reply to DNS request |xx|

10346

Webconnect error: Unknown SIP proxy |xx|

10347

Webconnect error: Unknown STUN server [xx]

10348

Webconnect error: No reply to request to STUN server

10349

Webconnect error: No reply to SIP option packs

10350

Webconnect error: Registration rejected by SIP registrar

10351

Webconnect error: Unknown SIP registrar |xx|

10352

Webconnect error: Faulty communication

10353

Webconnect error: registration of the SIP registry has not responded

10502

Active power limited AC frequency

10901

Start self-test [xx]

10902

Uac RPro [xxx] V

10903

Uac Max [xxx] V

10904

Uac Min [xxx] V

10905

Uac Min Fast [xxx] V

10906

Fac SwMax [xxx] Hz

10907

Fac SwMin [xxx] Hz

10908

Fac Max [xxx] Hz

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SMA Solar Technology AG

Operating manual STP50-40-BE-en-12 85

Event number Message, cause and corrective measures

10909

Fac Min [xxx] Hz

10910

Disconn. threshold [xxx] [xx]

10911

Stand. Val. [xxx] [xx]

10912

Disconn. time [xx] s

27103

Set parameter

The parameter changes are being adopted.

27104

Parameters set successfully

The parameter changes were successfully adopted.

27107

Update file OK

The update file found is valid.

27301

Update communication

The inverter is updating the communication component.

27302

Update main CPU

The inverter is updating the inverter component.

27312

Update completed

The inverter has successfully completed the update.

29001

Inst. code valid

The entered GridGuard code is valid. Protected parameters have now been unlocked and you can adjust the parameters. The parameters will be automatically locked again after ten feed-in hours.

29004

Grid parameters unchanged

Changing the grid parameters is not possible.

12.2 LED Signals

The LEDs indicate the operating state of the inverter.

LED signal Explanation

The green LED is flashing (twoseconds on and twoseconds off)

Waiting for feed-in conditions The conditions for feed-in operation are not yet met. As soon as the

conditions are met, the inverter will start feed-in operation.

The green LED flashes quickly

Update of central processing unit The central processing unit of the inverter is being updated.

The green LED is glowing Feed-in operation

The inverter feeds in with a power of at least 90%.

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SMA Solar Technology AG

Operating manualSTP50-40-BE-en-1286

LED signal Explanation

The green LED is pulsing Feed-in operation

The inverter is equipped with a dynamic power display via the green LED. Depending on the power, the green LED pulses fast or slow. If necessary, you can switch off the dynamic power display via the

green LED. The green LED is off The inverter is not feeding into the utility grid. The red LED is glowing Event occurred

If an event occurs, a distinct event message and the corresponding

event number will be displayed in addition on the inverter user inter-

face or in the communication product. The blue LED flashes slowly

for approx. one minute

Communication connection is being established

The inverter is establishing a connection to a local network or is es-

tablishing a direct connection to an end device via Ethernet (e.g.

computer, tablet PC or smartphone). The blue LED flashes quickly

for approx. two minutes.

WPS active

The WPS function is active. The blue LED is glowing Communication active

There is an active connection with a local network or there is a di-

rect connection with an end device via Ethernet (e.g. computer,

tablet PC or smartphone).

12.3 Forgotten Password

If you have forgotten the password for the inverter, you can unlock the inverter with a Personal Unlocking Key (PUK). For each inverter, there is one PUK for each user group (User and Installer). Tip: With PV systems in SunnyPortal, you can also assign a new password via SunnyPortal for the user group Installer. The password for the user group Installer is the same as the system password in SunnyPortal.

Procedure:

1. Request PUK (application form available at www.SMA-Solar.com).

2. Activate the user interface (see Section8.1, page50).

3. Enter the PUK instead of the password into the field Password.

4. Select Login.

5. Call up the menu Device Parameters.

6. Select [Edit parameters].

7. In the parameter group User Rights > Access Control change the password of the desired user group.

8. Select [Save all] to save the changes.

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Operating manual STP50-40-BE-en-12 87

PV Systems in SunnyPortal

The password for the user group Installer is also the system password for the PV system in SunnyPortal. Changing the password of the user group Installer can lead to the inverter no longer being able to be reached by SunnyPortal.

• Assign the changed password of the user group Installer as the new system password in SunnyPortal (see the SunnyPortal user manual at www.SMA-Solar.com).

12.4 Checking the PV System for Ground Faults

If the red LED is glowing and the event number 3501, 3601 or 3701 is being displayed in the Results menu on the inverter user interface, there may be a ground fault present. The electrical insulation from the PV system to ground is defective or insufficient.

WARNING

Danger to life due to electric shock

In the event of a ground fault, high voltages can be present.

• Touch the cables of the PV array on the insulation only.

• Do not touch any parts of the substructure or frame of the PV array.

• Do not connect PV strings with ground faults to the inverter.

NOTICE

Destruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 1000V or higher.

Procedure:

In order to check the PV system for ground faults, perform the following actions in the prescribed order. The exact procedure is described in the following sections.

• Check the PV system for ground faults by measuring the voltage.

• If the voltage measurement was not successful, check the PV system via insulation resistance measurement for ground faults.

Test by Measuring the Voltage

Proceed as follows to check each string in the PV system for ground faults.

Procedure:

DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section10, page69).

2. Measure the voltages:

• Measure the voltage between the positive terminal and the ground potential (PE).

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Operating manualSTP50-40-BE-en-1288

• Measure the voltage between the negative terminal and the ground potential (PE).

• Measure the voltage between the positive and negative terminals. If the following results are present at the same time, there is a ground fault in the PV system:

☑ All measured voltages are stable. ☑ The sum of the two voltages to ground potential is approximately equal to the

voltage between the positive and negative terminals.

• If a ground fault is present, determine the location of the ground fault via the ratio of the two measured voltages and eliminate the ground fault.

Example: Location of the ground fault

The example shows a ground fault between the second and third PV module.

3. If a definite ground fault cannot be measured and the message is still displayed, measure the insulation resistance.

4. Reconnect the strings without ground faults to the inverter and recommission the inverter.

Test by Measuring the Insulation Resistance

If the voltage measurement does not provide sufficient evidence of a ground fault, the insulation resistance measurement can provide more exact results.

Figure 17: Schematic diagram of the measurement

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Calculating the insulation resistance

The expected total resistance of the PV system or of an individual string can be calculated using the following formula:

total

The exact insulation resistance of a PV module can be obtained from the module manufacturer or the datasheet.

For the resistance of a PV module an average value can be assumed: for thin-film PV modules approximately 40MOhm and for polycrystalline and monocrystalline PV modules approximately50MOhm per PV module (for further information on calculating the insulation resistance see the Technical Information "Insulation Resistance (Riso) of Non-Galvanically Isolated PV Systems" at www.SMA-Solar.com).

Required devices:

☐ Suitable device for safe disconnection and short-circuiting ☐ Measuring device for insulation resistance

Device required for safe disconnection and short-circuiting of the PV array

The insulation resistance can only be measured with a suitable device for safe disconnection and short-circuiting of the PV array. If no suitable device is available, the insulation measurement must not be carried out.

Procedure:

1. Calculate the expected insulation resistance per string.

DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section10, page69).

3. Install the short circuit device.

4. Connect the measuring device for insulation resistance.

5. Short-circuit the first string.

6. Set the test voltage. The test voltage should be as close as possible to the maximum system voltage of the PV modules but must not exceed it (see datasheet of the PV modules).

7. Measure the insulation resistance.

8. Eliminate the short circuit.

9. Measure the remaining strings in the same manner.

☑ If the insulation resistance of a string deviates considerably from the theoretically

calculated value, there is a ground fault present in that string.

10. Reconnect to the inverter only those strings from which the ground fault has been eliminated.

11. Reconnect all other strings to the inverter.

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Operating manualSTP50-40-BE-en-1290

12. Recommission the inverter.

13. If the inverter still displays an insulation error, contact the Service (see Section16 "Contact", page102). The PV modules might not be suitable for the inverter in the present quantity.

12.5 Updating the Firmware

If no automatic update is set in the communication product (e.g. Cluster Controller) or via the user interface of the inverter, you have two possibilities to update the inverter firmware:

• Update the firmware via the user interface of the inverter.

• Update the firmware via USB flash drive.

Updating Firmware via the User Interface

Requirement:

☐ An update file with the desired inverter firmware must be available. The update file is, for

example, available for download on the product page of the inverter at www.SMA-Solar.com.

Procedure:

1. Activate the user interface (see Section8.1, page50).

2. Log into the user interface (see Section8.2, page53).

3. Select the menu System Configuration.

4. Select [Settings].

5. In the context menu, select [Updating the firmware].

6. Follow the instructions in the dialog.

Updating the Firmware via USB Flash Drive

Requirement:

☐ A USB flash drive with maximum 32GB and file system FAT32 must be available.

Procedure:

1. Create an "UPDATE" folder on the USB stick.

2. Save the update file with the desired firmware in the "UPDATE" folder on the USB flash drive. The update file is, for example, available for download on the product page of the inverter at www.SMA-Solar.com.

DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources and open the enclosure lid of the DC connection unit (see Section10, page69).

4. Insert the USB flash drive in the USB port on the communication assembly.

5. Commission the inverter (see Section7.2, page44). ☑ During start-up phase of the inverter, the desired firmware is being installed.

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DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources and open the enclosure lid of the DC connection unit (see Section10, page69).

7. Pull the USB flash drive out of the USB port.

8. Commission the inverter (see Section7.2, page44).

9. Call up the user interface of the inverter and check the events to see whether a firmware update has been successfully completed.

10. If the firmware update has not been successfully completed, perform the firmware update again.

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Operating manualSTP50-40-BE-en-1292

13 Decommissioning the Inverter

To decommission the inverter completely upon completion of its service life, proceed as described in this Section.

CAUTION

Risk of injury when lifting the inverter, or if it is dropped

The inverter weighs 84kg. You risk injury if you lift the inverter incorrectly or if it is dropped while being transported or mounted.

• Carry and lift the inverter in an upright position with several people without tilting it.

Requirements:

☐ A pallet must be available. ☐ Original packaging with paddings must be available. ☐ All transport handles must be in place.

Procedure:

DANGER

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section10, page69).

CAUTION

Risk of burns due to hot enclosure parts

• Wait 30 minutes for the enclosure to cool down.

3. Remove the AC cable from the inverter. Loosen the screws with an Allen key (AF8) and pull the cables out of the terminal.

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4. Disconnect the grounding conductor from the grounding terminal. To do so, loosen the screws with a Torx screwdriver (TX25) and pull the grounding conductor out under the clip.

5. Remove the AC cable from the inverter.

6. Remove the M63 cable gland from the enclosure opening in the AC connection unit. To do so, remove the inside counter nut and remove the cable gland from the enclosure opening.

7. When the AC surge arresters are inserted, pull the surge arresters out of the slots. To do so, squeeze the grooved areas on the left and right sides of the surge arrester.

8. Position the enclosure lid of the AC connection unit on the AC connection unit and first tighten the upper-left and lower-right screws, and then the remaining screws crosswise using a Torx screwdriver (TX25) (torque: 6Nm).

10x10x

9. Unscrew all ten screws of the enclosure lid of the DC connection unit with a Torx screwdriver (TX25) and remove the enclosure lid towards the front.

10x10x

10. Set the screws and the enclosure lid aside and store safely.

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Operating manualSTP50-40-BE-en-1294

11. Remove all connection cables from the communication assembly and pull out the connection cables out of the DC connection unit.

Max. 30V DC

USB

FCC ID: SVF-KP20

IC: 9440A-KP20

ANT.

SPS

12. Remove all cable glands from the inverter. To do so, unscrew the counter nut from inside and remove the cable glad from the enclosure opening.

13. When the DC surge arresters are inserted, pull the surge arresters out of the slots. To do so, squeeze the grooved areas on the left and right sides of the surge arrester.

SPS

14. Position the enclosure lid of the DC connection unit on the DC connection unit and first tighten the upper-left and lower-right screws, and then the remaining screws crosswise using a Torx screwdriver (TX25) (torque: 6Nm).

10x10x

15. Screw all four transport handles as far as they will go into the taps on the right- and left-hand side until they lie flush with the enclosure. When doing so, ensure that the transport handles are screwed into the taps so that they are perfectly straight. If the transport handles are not screwed in straight, this can make it more difficult or even impossible to unscrew them later on and can damage the taps to the extent that transport handles can no longer be screwed into them.

4x4x

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16. Insert a screwdriver into the holes in the transport handle and turn the screwdriver through 90°. This ensures that the transport handles are securely tightened.

90°

17. To remove the feet or profile rails, lay the inverter carefully on the AC connection unit side.

18. If the inverter is to be stored or shipped, pack the inverter in its original packaging.

• Place the lower part of the original packaging with padding on the pallet

• Place the inverter with padding on the pallet. For this purpose, put the AC connection unit side of the inverter on top of the padding.

• Remove all four transport handles from the taps. If necessary, insert a screwdriver into the holes on the transport handle and use the screwdriver to remove the transport handle.

• Pull the upper part of the original packaging over the inverter.

• Insert the upper padding.

• Close the packaging.

• Secure the packaging and pallet with strapping or with fastening belts.

19. Dispose of the inverter in accordance with the locally applicable disposal regulations for electronic waste.

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14 Technical Data

DC Input

Maximum PV array power 75000 Wp STC Maximum input voltage 1000V MPP voltage range 500V to 800V Rated input voltage 670V Minimum input voltage 150V Initial input voltage 188V Maximum input current per DC connector 20A Maximum input current per input 20A Maximum short-circuit current per input* 30A Maximum reverse current from the inverter in the

system for max. 1ms**

‒

Number of independent MPP inputs 6 Strings per MPP input 2 Overvoltage category in accordance with

IEC62109-1

* In accordance with IEC62109-2: I

SCPV

** The topology prevents a reverse current from the inverter in the system

AC Output

Rated power at 230V, 50Hz 50000W Maximum apparent AC power 50000VA Rated grid voltage 230V Nominal AC voltage 400V / 230V AC voltage range* 202V to 264V Nominal AC current at 230V 72.5A Maximum output current 72.5A Maximum output current under fault conditions 86A Total harmonic distortion of the output current

with total harmonic distortion of the AC voltage <2%, and AC power >50% of the rated power

< 2%

Inrush current <10% of the nominal AC current for a

maximum of 10ms

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Rated power frequency 50Hz AC power frequency* 50 Hz / 60 Hz Operating range at AC power frequency 50Hz 44Hz to 55Hz Operating range at AC power frequency 60Hz 54Hz to 65Hz Power factor at rated power 1 Displacement power factor, adjustable 0.0overexcitedto0.0underexcited Feed-in phases 3 Phase connection 3 (+1) Overvoltage category in accordance with

IEC62109-1

III

* Depending on the configured country data set

Multifunction relay

Maximum DC switching voltage 30V Maximum AC switching current 1.0A Maximum DC switching current 1.0A Minimum load 0.1W Minimum electrical endurance when the maxi-

mum switching voltage and maximum switching current are complied with*

100000 switching cycles

* Corresponds to 20years at 12switching operations per day

Efficiency

Maximum efficiency, η

max

> 98.1%

European weighted efficiency, η

> 97.8%

Protective Devices

DC reverse polarity protection Short-circuit diode Input-side disconnection point DC load-break switch DC overvoltage protection Surge arrester typeII (optional) AC short-circuit current capability Current control Grid monitoring SMAGridGuard4 Maximum permissible fuse protection 100A Ground fault monitoring Insulation monitoring: R

iso

>34kΩ

All-pole sensitive residual-current monitoring unit Available

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Operating manualSTP50-40-BE-en-1298

General Data

Width x height x depth, without feet or DC loadbreak switch

592mmx 733mmx 679mm

Weight 84kg Length x width x height of the packaging 800mmx600mmx886mm Transport weight 100kg Climatic category in accordance with IEC

60721-3-4

4K4H

Environmental category Outdoors Pollution degree of all enclosure parts 2 Operating temperature range -25°C to +60°C Maximum permissible value for relative humid-

ity, non-condensing

100%

Maximum operating altitude above mean sea level (MSL)

3000m

Typical noise emission 64dB(A) Power loss in night mode 5W Topology Transformerless Cooling method SMAOptiCool Number of fans 3 Degree of protection for electronics in accor-

dance with IEC60529

IP65

Protection class in accordance with IEC62109-1

Radio technology WLAN 802.11 b/g/n Radio spectrum 2.4GHz Maximum transmission power 100 mW Grid configurations TN-C, TN-S, TN-C-S, TT (when V

N_PE

<20V)

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Operating manual STP50-40-BE-en-12 99

National standards and approvals, as per 05/2017*

ANRE 30, AS 4777, BDEW 2008,

C10/11:2012, CE, CEI0-16, CEI0-21,

EN50438:2013, G59/3, IEC60068-2-x,

IEC61727, IEC62109-1/2, IEC62116,

MEA2013, NBR16149, NENEN50438,

NRS091-2-1, PEA2013, PPC, RD1699/413,

RD661/2007, Res.n°7:2013, SI4777,

TORD4, TR3.2.2, UTEC15-712-1,

VDE0126-1-1, VDE-ARN4105, VFR2014,

P.O.12.3, NTCO-NTCyS, GC8.9H, PR20,

DEWA

* EN50438:2013 Does not apply to all country standard deviations of EN50438

IEC62109-2: In order to meet the requirements of this standard, the inverter must either be equipped with a multifunction relay used as a fault indicator contact or there must be a connection to SunnyPortal with the fault alarm in SunnyPortal activated.

Climatic Conditions

Installation in accordance with IEC60721-3-4, Class4K4H

Extended temperature range -25°Cto+60°C Extended humidity range 0%to100% Threshold for relative humidity, non-condensing 100% Extended air pressure range 79.5kPato106kPa

Transport in accordance with IEC 60721-3-4, Class 2K3

Temperature range -40°C to +70°C

Equipment

DC connection SUNCLIX DC connector AC connection Screw terminals Multifunction relay As standard Surge protection devices TypeII for AC and/or

Optional

Torques

Screws for the DC Connection Unit and AC Connection Unit enclosure lids

6Nm

Screws for AC terminals with conductor crosssection of 35mm² to 95mm²

20Nm

Screws for AC terminals with conductor crosssection of 120mm²

30Nm

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Operating manualSTP50-40-BE-en-12100

Screws for attaching the feet or profile rails 16Nm Screws for the cover on the top of the inverter 6Nm Counter nut of M63 cable gland 14Nm Swivel nut for M63 cable gland 33Nm Swivel nut for M32 cable gland 5Nm SUNCLIX swivel nut 2Nm

Data Storage Capacity

Daily energy yields 63days Daily yields 30years Event messages for users 1024 events Event messages for installers 1024 events

SMA SUNNY TRIPOWER CORE1, SUNNY TRIPOWER CORE1-US, STP 50-40 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual