SMA STP 12000TL-US User Manual

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InstallationManual

SUNNYTRIPOWER 12000TL-US/ 15000TL-US/ 20000TL-US/ 24000TL-US

STP12-24TL-US-IA-en-16 | Version 1.6

ENGLISH

Legal Provisions

SMA Solar Technology AG

Legal Provisions

form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, LLC.

Neither SMA America,LLC nor SMA Solar Technology Canada Inc. makes representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America,LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc. nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances.

(The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.)

Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that product improvements and field usage experience may cause SMA Solar Technology America LLC and/or SMA Canada Inc. to make changes to these specifications without advance notice, or per contract provisions in those cases where a supply agreement requires advance notice. SMA shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material.

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.

The BLUETOOTH® word mark and logos are registered trademarks of Bluetooth SIG, Inc. and any use of such marks by SMA America,LLC and SMA Solar Technology Canada Inc. is under license.

Modbus® is registered trademark of Schneider Electric and is licensed by Modbus Organization, Inc.

QR Code is a registered trademark of DENSO WAVE INCORPORATED. Phillips® and Pozidriv® are registered trademarks of Phillips Screw Company. Torx® is a registered trademark of Acument Global Technologies, Inc.

SMA America, LLC

3801 N. Havana Street

Denver, CO 80239 U.S.A.

SMA Solar Technology Canada Inc.

2425 Matheson Blvd. E

7th Floor

Mississauga, ON L4W 5K4

Canada

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SMA Solar Technology AG

Important Safety Instructions

SAVE THESE INSTRUCTIONS

This manual contains important instructions for the following products:

• STP 12000TL-US-10 (Sunny Tripower 12000TL-US)

• STP 15000TL-US-10 (Sunny Tripower 15000TL-US)

• STP 20000TL-US-10 (Sunny Tripower 20000TL-US)

• STP 24000TL-US-10 (Sunny Tripower 24000TL-US)

This manual must be followed during installation and maintenance.

The product is designed and tested in accordance with international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the product. To reduce the risk of personal injury and to ensure the safe installation and operation of the product, you must carefully read and follow all instructions, cautions and warnings in this manual.

Warnings in this Document

A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.

Symbol Description

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

Warnings on this Product

The following symbols are used as product markings with the following meanings.

Warning regarding dangerous voltage

The product works with high voltages. All work on the product must only be performed as described in the documentation of the product.

Beware of hot surface

The product can become hot during operation. Do not touch the product during operation.

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Important Safety Instructions

Observe the operating instructions

Read the documentation of the product before working on it. Follow all safety precautions and instructions as described in the documentation.

SMA Solar Technology AG

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General Warnings

All electrical installations must be made in accordance with the local and NationalElectrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSAC22.1. This document does not

and is not intended to replace any local, state, provincial, federal or national laws, regulations or codes applicable to the installation and use of the product, including without limitation applicable electrical safety codes. All installations must conform with the laws, regulations, codes and standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product.

The product contains no user-serviceable parts. For all repair and maintenance, always return the unit to an authorized SMA Service Center.

Before installing or using the product, read all of the instructions, cautions, and warnings in this manual.

Before connecting the product to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel.

Wiring of the product must be made by qualified personnel only.

Installation Manual 5STP12-24TL-US-IA-en-16

Table of Contents

SMA Solar Technology AG

Table of Contents

1 Information on this Document ................................................. 9

1.1 Validity................................................................................................ 9

1.2 Target Group...................................................................................... 9

1.3 Additional Information ....................................................................... 9

1.4 Symbols .............................................................................................. 10

1.5 Nomenclature..................................................................................... 10

2 Safety......................................................................................... 11

2.1 Intended Use ...................................................................................... 11

2.2 Safety Information.............................................................................. 12

3 Scope of Delivery...................................................................... 14

4 Product Description................................................................... 15

4.1 Sunny Tripower .................................................................................. 15

4.2 Interfaces and Functions .................................................................... 17

5 Mounting ................................................................................... 19

5.1 Requirements for Mounting ............................................................... 19

5.2 Mounting the Inverter......................................................................... 22

6 Electrical Connection................................................................. 25

6.1 Safety during Electrical Connection.................................................. 25

6.2 Overview of the Connection Area .................................................... 27

6.2.1 View from Below............................................................................ 27

6.2.2 Interior View ................................................................................... 28

6.3 AC Connection................................................................................... 28

6.3.1 Requirements for the AC Connection............................................ 28

6.3.2 Connecting the Inverter to the Utility Grid.................................... 29

6.3.3 Connecting Additional Grounding ............................................... 31

6.4 DC Connection................................................................................... 32

6.4.1 Requirements for the DC Connection............................................ 32

6.4.2 Connecting the PV Array ............................................................... 33

6.5 Connecting the Inverter to the Network ........................................... 35

7 Commissioning the Inverter ..................................................... 37

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Table of Contents

8 Configuration ............................................................................ 38

8.1 Integrating the Inverter into the Network.......................................... 38

8.2 Changing Operating Parameters...................................................... 38

8.3 Setting the Active Power Limitation in case of PV System Control

Failure ................................................................................................. 39

8.4 Deactivating the Arc-Fault Circuit Interrupter (AFCI)........................ 39

8.5 Setting SMA OptiTrac Global Peak ................................................. 39

8.6 Adjustable Parameters....................................................................... 39

9 Disconnecting the Inverter from Voltage Sources.................. 41

10 Troubleshooting ........................................................................ 43

10.1 Cleaning the Inverter.......................................................................... 43

10.2 Event Messages ................................................................................. 43

10.3 Cleaning the Fans .............................................................................. 54

10.3.1 Cleaning the Fan at the Bottom..................................................... 54

10.3.2 Cleaning the Fan on the Left-Hand Side of the Enclosure ........... 55

10.4 Checking the Function of the Fans .................................................... 57

10.5 Checking the PV System for Ground Faults...................................... 57

10.6 Resetting the Operation Inhibition after Detection of an Arc Fault . 60

11 Recommissioning the Inverter.................................................. 61

12 Decommissioning the Inverter ................................................. 63

13 Procedure for Receiving a Replacement Device .................... 65

14 Technical Data........................................................................... 69

14.1 DC/AC ............................................................................................... 69

14.1.1 Sunny Tripower 12000TL-US / 15000TL-US / 20000TL-US..... 69

14.1.2 Sunny Tripower 24000TL-US........................................................ 71

14.2 General Data ..................................................................................... 72

14.3 Protective Devices .............................................................................. 73

14.4 Climatic Conditions............................................................................ 74

14.5 Equipment........................................................................................... 74

14.6 Torques............................................................................................... 74

14.7 Data Storage Capacity...................................................................... 74

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Table of Contents

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15 Spare Parts and Accessories.................................................... 75

16 Compliance Information........................................................... 76

17 Contact....................................................................................... 77

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1 Information on this Document

1.1 Validity

This document is valid for the following device types:

• STP 12000TL-US-10 (Sunny Tripower 12000TL-US)

• STP 15000TL-US-10 (Sunny Tripower 15000TL-US)

• STP 20000TL-US-10 (Sunny Tripower 20000TL-US)

• STP 24000TL-US-10 (Sunny Tripower 24000TL-US)

1.2 Target Group

The tasks described in this document must only be performed by qualified persons. Qualified persons must have the following skills:

• Knowledge of how an inverter works and is operated

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

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

• Knowledge of the applicable standards and directives

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

1.3 Additional Information

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

Document title Document type

"SunnyExplorer" Software for Visualizing and Administrating a SpeedwireSystem

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

rameters of the inverter

"Parameter list" Overview of All Inverter Operating Parameters and Their Configura-

tion Options

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

and SunnyMiniCentral Inverters

"Leading Leakage Currents" Information on the Design of Transformerless Inverters

User Manual

Technical Information

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1 Information on this Document

Document title Document type

"Shade Management" Efficient operation of partly shaded PV systems with OptiTracGlob-

alPeak

"Module Technology" Use of Thin-Film and Back-Contact Modules

SMA Solar Technology AG

Technical Information

1.4 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

1.5 Nomenclature

Complete designation Designation in this document

SMAAmericaProduction,LLC SMA

SMA Solar Technology Canada Inc. SMA

SMA Speedwire Speedwire

PV system PV system

SunnyTripower 12000TL-US/ 15000TL-US/ 20000TLUS/ 24000TL-US

SMAConnectionUnit1000-US Connection Unit

SunnyTripower, inverter

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SMA Solar Technology AG

2 Safety

2.1 Intended Use

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

No galvanic isolation

• The product is not equipped with a transformer and therefore has no galvanic isolation. Do not use grounded PV modules with the product. Only ground the mounting frame of the PV modules. If you connect grounded PV modules to the product, the error message Insulation resistance > Check generator occurs.

• The AC output/neutral conductor is not bonded to ground inside of the product.

The product is suitable for indoor and outdoor use. The SunnyTripower must only be operated with PV arrays (PV modules and cabling) that are

approved by the electrical standards applicable on-site and the NationalElectricalCode® ANSI/ NFPA70 or the CanadianElectricalCode® CSAC22.1. The PV modules used must be suitable for use with the SunnyTripower.

SMA offers the SMAConnectionUnit which is equipped with fuse holders for string fuses for up to eight strings and with a DC load-break switch. The SMA Connection Unit combines up to four strings to each of two output circuits. These two DC electric circuits can be connected to the two MPP tracker inputs of the SunnyTripower (for further information see the installation manual of the SMAConnectionUnit-US at www.SMA-Solar.com).

PV modules with a high capacity to ground may only be used if their coupling capacity does not exceed 3.5 μF.

All components must remain within their permitted operating ranges at all times. To protect the PV system against excessive reverse currents under fault conditions, the National

Electrical Code®, Section 690.9, requires overcurrent protection for PV source circuits where

possible short-circuit currents exceed the ampacity of source circuit conductors or the maximum series fuse rating of the PV modules. Typically, this requires string fusing where more than two strings are combined in parallel. Where overcurrent protection is required, National Electrical

Code®, Section 690.35, requires that both positive and negative conductors have overcurrent

protection for ungrounded PV arrays. The product must only be used in countries for which it is approved or released by SMA and the

grid operator. The product is not equipped with a transformer and therefore has no galvanic isolation. Do not use

grounded PV modules with the product. Only ground the mounting frame of the PV modules. If you connect grounded PV modules to the product, the error message Insulation resistance > Check generator occurs.

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.

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2 Safety

Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of SMA. Unauthorized alterations will void guarantee and warranty claims and usually void the operating license. SMA 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 appropriate.

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.

SMA Solar Technology AG

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.

Danger to life due to high voltages of the PV array

When exposed to sunlight, 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 (see Section9, page41).

Danger to life due to electric shock in case of a ground fault

If a ground fault occurs, parts of the system may still be live. Touching live components can lead to lethal electric shocks.

• Ensure that no voltage is present and wait five minutes before touching any parts of the PV system or the inverter.

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Risk of burns from hot surfaces

The surface of the inverter can get very hot. Touching the surface can result in burns.

• Mount the inverter in such a way that it cannot be touched inadvertently.

• Do not touch hot surfaces.

• Wait 30 minutes for the surface to cool sufficiently.

• Observe the safety messages on the inverter.

Damage to the inverter due to moisture and dust intrusion

Dust or moisture intrusion can damage the inverter and impair its functionality.

• Close all enclosure openings of the inverter tightly.

• Never open the inverter when it is raining or snowing, or the humidity is over 95%.

2 Safety

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3 Scope of Delivery

SMA Solar Technology AG

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.

Figure 1: Components included in the scope of delivery

Position Quantity Designation

A 1 Inverter

B 1 Wall mounting bracket

C 1 Installation manual, production test report, supplementary

sheet with the default settings

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Model

SB X XXXXXTLUS-

SUNNY BOY

S/N

XXXXXXXXXX

Untilityinteractive 1-phase inverter Made in Germany

SMA Solar Technology AG

www.sma-solar.com

Date of manufactureMM/YYYY

Max. continuous output Power*XXXX Wac Reduced output power rating Operating voltage range (Vac)* MIN NOMINAL MAX

XXX XXX

Operating frequency range (Hz)* MIN NOMINAL MAX

XX.X XX.X XX.X

Max. vontinuous output current*

XX.X Aac @ XXX VXX.X Aac @ XXX V

Output power factor X Max. open circuit input voltage*XXX Vdc Range of input operating DC voltage (MPPT)*

XXX - XXX Cdc @ XXX V XXX - XXX Cdc @ XXX V

Oper.temp.range*-XXX°Fto+XXX°F(-XX°Cto+XX°C)

ThisunitcontainsaResidualCurrentMonitor,Isolation MonitorandInterrupter.Thisunitcontainsalisted PhotovoltaicArc-FaultCircuit-ProtectionofType1

ENCLOSURE TYPE XR (IP54)

*Formoredetailsandfürtighteningtorque, allowablewiresizeandtypeseethe InstallationGuide.

Section 1 of 2

Utility interactive inverter Listet UL 1741 36AN

Utility interactive 1-Phase inverter

TestedTo Comply With FCC Standards

FORHOMEOROFFICEUSE

CCAN/CSAC22.2No.107.1-1UL1699B

DE34

www.sunnyportal.com/register PIC 001800304600117 RID:37XXA3

SMA Solar Technology AG

4 Product Description

4.1 SunnyTripower

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

No galvanic isolation

• The AC output/neutral conductor is not bonded to ground inside of the product.

Figure 2: Design of the SunnyTripower

Position Designation

A Thread for screwing in the eye bolts for transport with a crane

B Upper enclosure lid

C Type label

The type label uniquely identifies the inverter. You will require the information on the type label to use the product safely and when seeking customer support from the SMAServiceLine. You will find the following information on the type label:

• Device type (Model)

• Serial number (SerialNo.)

• Date of manufacture

• Device-specific characteristics

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4 Product Description

Position Designation

D Additional label with details for registration in SunnyPortal:

• Internet address of the PV System Setup Assistant

• Identification key (PIC)

• Registration ID (RID)

E Ventilation grid

F Recessed grips

G LEDs

The LEDs indicate the operating state of the inverter:

• Green LED is glowing: operation

• Green LED is flashing: the requirements for the connection to the utility grid have not been met or the inverter has reduced its output power due to excessive temperature.

• Red LED is glowing: an error has occurred that must be rectified by a qualified person (see Section10 "Troubleshooting", page43). You will find the detailed error message in SunnyPortal or SunnyExplorer.

• Blue LED: no function

H Lower enclosure lid

Symbols on the Inverter and on the Type Label

SMA Solar Technology AG

Symbol Explanation

Inverter This symbol is located next to the green LED which indicates feed-in oper-

ation of the inverter.

Observe the documentation This symbol is located next to the red LED which indicates a fault or distur-

bance (see Section10 "Troubleshooting", page43).

Communication This symbol is located next to the blue LED.

The product does not have a transformer.

Equipment Grounding Terminal

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Symbol Explanation

Danger to life due to electric shock The product operates at high voltages. All work on the product must be

carried out by qualified persons only.

Risk of burns due to hot surfaces The product can get hot during operation. Avoid contact during opera-

tion. Allow the product to cool down sufficiently before carrying out any work.

Observe the documentation Observe all documentation supplied with the product.

FCC designation The product complies with the requirements of the applicable FCC stan-

dards.

UL certification mark UL1741 is the standard applied by Underwriters Laboratories to the

product to certify that it meets the requirements of the National Electrical

Code ®, the Canadian Electrical Code® CSA C22.1 and

IEEE‑929‑2000. IEEE 929-2000 provides recommendations regarding the proper equipment and functionality necessary to ensure compatible operation when power generation is connected to the utility grid.

4 Product Description

4.2 Interfaces and Functions

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

SMASpeedwire/Webconnect

The inverter is equipped with SMA Speedwire/Webconnect as standard. SMA Speedwire/ Webconnect is a type of communication based on the Ethernet standard. This enables inverteroptimized 10/100Mbit data transmission between Speedwire devices in PV systems and the software Sunny Explorer. The Webconnect function enables direct data transmission between the inverters of a small-scale system and the Internet portal SunnyPortal without any additional communication device and for a maximum of 4 inverters per SunnyPortal system. In large-scale PV power plants, data transmission to the Internet portal SunnyPortal is carried out via the SMAClusterController. You can access your SunnyPortal system from any computer with an Internet connection.

Class 1 wiring methods are to be used for field wiring connection to the terminals of the communication interface.

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4 Product Description

SMA Solar Technology AG

RS485 Interface

The inverter can communicate via cables with special SMA communication products via the RS485 interface (information on supported SMAproducts at www.SMA-Solar.com). The RS485 interface can be retrofitted and can be used in place of the SMASpeedwire/Webconnect interface in the inverter.

Class 1 wiring methods are to be used for field wiring connection to the terminals of the communication interface.

Grid Management Services

The inverter 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.

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. You can activate SMAOptiTracGlobalPeak via the operating parameters (see Section8.5 "Setting SMA OptiTrac Global Peak", page39).

Arc-Fault Circuit Interrupter (AFCI)

In accordance with the National Electrical Code®, Article 690.11, the inverter has a system for arc fault detection and interruption.

An electric arc with a power of 300W or greater must be interrupted by the AFCI in the time specified by UL 699B. A tripped AFCI can only be reset manually. The 2011 edition of the

National Electrical Code®, Section 690.11, stipulates that newly installed PV systems attached to a

building must be fitted with a means of detecting and disconnecting serial electric arcs on the DC side. If you prefer not to have that function, you can deactivate the arc-fault circuit interrupter via a communication product (see Section8.4, page39).

QonDemand 24/7

The inverter can supply reactive power by means of QonDemand24/7 covering the entire unit circle around the clock (for details on the configuration refer to the Technical Information "IntegratedPlantControl and QonDemand24/7" at www.SMA-Solar.com).

IntegratedPlantControl

The inverter can display the Q(V) characteristic curve specified by the grid operator by means of IntegratedPlantControl without measuring on the grid-connection point. The inverter can automatically compensate equipment installed between the inverter and the grid-connection point after having activated the function (for information on the system configuration refer to the Technical Information "IntegratedPlantControl and QonDemand24/7" at www.SMA-Solar.com).

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SMA Solar Technology AG

5 Mounting

5.1 Requirements for Mounting

Requirements for the mounting location:

Danger to life due to fire or explosion

Despite careful construction, electrical devices can cause fires.

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

• Do not mount the inverter in a potentially explosive atmosphere.

☐ Do not mount the inverter on a pillar. ☐ The inverter must be mounted on a solid support surface (e.g. concrete, brickwork, free-

standing constructions). ☐ Do not install the inverter in a living area. ☐ The mounting location must be suitable for the weight and dimensions of the inverter (see

Section14 "Technical Data", page69). ☐ To ensure optimum operation, the ambient temperature should be between -25°C (-13°F) and

60°C (140°F). ☐ The inverter can be mounted in a position that is directly exposed to solar irradiation.

However, it is possible that the inverter may become overheated and its power be reduced as

a result. ☐ Climatic conditions must be met (see Section14 "Technical Data", page69). ☐ 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.

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5 Mounting

Dimensions for mounting:

SMA Solar Technology AG

Figure 3: Position of the anchoring points

Recommended clearances:

To guarantee optimal operation and adequate heat dissipation for the inverter, the following requirements for clearances should be observed. This will prevent the inverter power output from being reduced due to excessive temperatures. However, smaller clearances are permitted without causing any risk.

Installation ManualSTP12-24TL-US-IA-en-1620

1382 mm

(54.41 in)

2224 mm (87.56 in)

530 mm

(20.87 in)

50 mm

(1.97 in)

400 mm

(15.45 in)

315 mm

(14.45 in)

415 mm

(16.34 in)

438 mm

(17.24 in)

415 mm

(16.34 in)

940 mm

(37.01 in)

(7.48 in)

190 mm

SMA Solar Technology AG

5 Mounting

Prescribed clearances in accordance with the

National Electrical Code

Under certain conditions, the National Electrical Code® specifies greater clearances.

• Ensure that the prescribed clearances in accordance with the National Electrical Code®, paragraph 110.26 and Canadian Electrical Code® CSA C22.1 are adhered to.

☐ Observe the recommended clearances to walls as well as to other inverters or objects. ☐ Ensure adequate clearance on the right-hand side of the inverter below the fan. ☐ If multiple inverters are mounted in areas with high ambient temperatures, increase the

clearances between the inverters and ensure an adequate fresh-air supply, if possible.

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 LED signals can be read without difficulty.

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5 Mounting

Figure 4: Permitted and prohibited mounting positions:

SMA Solar Technology AG

5.2 Mounting the Inverter

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

☐ At least two screws suitable for the support surface (diameter: 10mm at maximum) ☐ At least two washers that are suitable for the screws (diameter: 30mm (1.8in) at maximum) ☐ If necessary, two screw anchors suitable for the support surface and the screws ☐ For transporting the inverter with a crane: two eye bolts suitable for the weight of the inverter

(size: M10)

☐ To secure the inverter from being lifted off: two screws, washers and screw anchors that are

suitable for the support surface

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SMA Solar Technology AG

5 Mounting

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

The inverter weighs 55kg (121lb). There is risk of injury if the inverter is lifted incorrectly or dropped while being transported or when attaching it to or removing it from the wall mounting bracket.

• Carry and lift the inverter in an upright position with several people without tilting it. With one hand grasp the recessed grip, and with the other hand support the top part of the enclosure. This will prevent the inverter tipping forward.

• If the inverter is to be transported and lifted with a crane, remove the filler plugs on the top of the inverter and screw the eye bolts into the threads.

Risk of burns due to hot enclosure parts

Some parts of the enclosure can get hot during operation.

• Mount the inverter in such a way that it cannot be touched inadvertently during operation.

Procedure:

Risk of injury due to damaged cables

There may be power cables or other supply lines (e.g. gas or water) routed in the wall.

• Ensure that no lines are laid in the wall which could be damaged when drilling holes.

2. Align the wall mounting bracket horizontally on the wall and use it to mark the position of the drill holes. Use at least one hole on the right-hand and left-hand side in the wall mounting bracket.

3. If the inverter is to be secured from being lifted off of the wall mounting bracket, mark the position of the drill holes for the screw that attaches the inverter to the wall mounting bracket. Observe the dimensions of the two anchoring points at the bottom of the inverter rear panel.

4. Set the wall mounting bracket aside and drill the marked holes.

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5. Insert screw anchors into the drill holes if the support surface requires them.

6. Secure the wall mounting bracket horizontally using screws and washers.

7. Hook the inverter into the wall mounting bracket.

8. If the inverter has been transported with a crane, remove the eye bolts from the threads on the top of the inverter and reinsert the filler plugs.

9. In order to secure the inverter from being lifted off the wall accidentally, attach it to the wall with suitable mounting material. Use both of the lower drill holes on the rear panel of the inverter.

10. Ensure that the inverter is securely in place.

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6 Electrical Connection

6.1 Safety during Electrical Connection

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 (see Section9 "Disconnecting the Inverter from Voltage Sources", page41).

Risk of fire

• To reduce the risk of fire, connect only to a circuit provided with 50A maximum branchcircuit overcurrent protection in accordance with the National Electrical Code® (NE, ANSI/ NFPA 70).

Damage to seals on the enclosure lids in subfreezing conditions

If you open the upper and lower enclosure lids when temperatures are below freezing, the enclosure seals can be damaged. This can lead to moisture entering the inverter.

• Do not open the inverter at ambient temperatures lower than -5°C (23°F).

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

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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Damage to the inverter due to moisture ingress during electrical installation

• Never open the inverter when it is raining or snowing, or the humidity is over 95%.

• For attaching the conduits to the enclosure, only use UL-listed rain-tight conduit fittings or ULlisted conduit fittings for wet locations complying with UL514B.

• Seal all unused openings tightly.

Ground faults, unreliable and highly resistive connections due to

Wire Nuts

Potential damage to or failure of the inverter.

• Do not use Wire Nuts®.

Electrical installations

All electrical installations must be carried out in accordance with the local standards and the

National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.

• Before connecting the inverter to the utility grid, contact your local grid operator. The electrical connection of the inverter must be carried out by qualified persons only.

• Ensure that no cables used for electrical connection are damaged.

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6 Electrical Connection

6.2 Overview of the Connection Area

6.2.1 View from Below

Figure 5: Enclosure openings at the bottom of the inverter

Position Designation

A Enclosure opening with filler plug for communication connection

(diameter: 27.8mm to 28.0mm (1.09in to 1.1in))

B Enclosure opening with filler plug for Ethernet connection

(diameter: 27.8mm to 28.0mm (1.09in to 1.1in))

C Enclosure opening for AC connection

(diameter: 34.5mm to 34.7mm (1.36in to 1.37in))

D Enclosure openings for DC connection

(diameter: 34.5mm to 34.7mm (1.36in to 1.37in))

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6.2.2 Interior View

Figure 6: Connection areas in the interior of the inverter

Position Designation

A Connecting terminal plate for AC connection

B Switch for changing the language to English for service purposes

C Screw to release and attach the communication board

D Slot for the SD memory card, for service purposes only

E Terminal for equipment grounding and grounding electrode conductor

F Connecting terminal plate for DC connection

6.3 AC Connection

6.3.1 Requirements for the AC Connection

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

☐ 1 metal conduit: 25.4mm (1in) ☐ 1 UL-listed rain-tight conduit fitting for wet locations: 25.4mm (1in)

Cable requirements:

☐ The AC cable must be approved for temperatures of over +90°C (+194°F). ☐ The AC cable must be designed in accordance with the local installation requirements. ☐ The AC cable must be made of solid wire or stranded wires. ☐ Conductor cross-section: 10mm² to 16mm² (8AWG to 6AWG) ☐ Cable type: copper wire ☐ The maximum cable length subject to conductor cross-section must be observed.

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6 Electrical Connection

Load-break switch and cable protection:

Damage to the inverter through the use of fuses as disconnecting units in the output circuit of the inverter

Fuses must not be used as disconnecting units, even if they are installed in a fuse holder listed as being a load-break switch.

• If fuses are installed as overcurrent protection in the output circuit of the inverter, a disconnection switch or another load-break switch suitable for the load must be installed as a disconnecting unit in the output circuit of the inverter.

• Use a circuit breaker as load-break switch, for example. These can be used both as overcurrent protection and as disconnecting unit.

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

breaker. Observe the maximum permissible fuse protection (see Section14 "Technical Data", page69). This will prevent residual voltage from being present at the corresponding cable after disconnection.

☐ The load-break switch or circuit breaker must be listed (seeNational Electrical Code®, ANSI/

NFPA 70) ☐ Loads installed between the inverter and the circuit breaker must be fused separately. ☐ The overcurrent protection for the AC output circuit is to be provided by others.

6.3.2 Connecting the Inverter to the Utility Grid

Requirements:

☐ All electrical installations must be carried out in accordance with the local standards and the

National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.

☐ The AC and DC electric circuits are isolated from the enclosure. If required by section 250 of

the National Electrical Code®, ANSI/NFPA 70, the installer is responsible for grounding the

system. ☐ 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:

Danger to life due to electric shock

• Ensure that the three-pole circuit breaker is switched off and cannot be reconnected.

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2. Release all screws of the lower enclosure lid using an Allen key (AF3).

3. Lift and remove the lower enclosure lid from below.

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

Damage to the inverter due to moisture and dust intrusion

Electronic components in the inverter can be destroyed or damaged as a result of dust or moisture intrusion.

• Do not enlarge the enclosure opening.

6. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.

7. Attach the conduit to the enclosure opening.

8. Insert the AC cable through the conduit into the inverter.

9. Strip the cable insulation by 12mm to 13mm (0.5in).

10. Open all locking levers of the connecting terminal plate right up to the stop.

11.

Risk of fire if two conductors are connected to one terminal

If you connect two conductors to a terminal, a fire can occur due to a bad electrical connection.

• Never connect more than one conductor per terminal.

12. Connect the equipment grounding conductor to the terminal .

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6 Electrical Connection

13. Connect the conductor N to the terminal N.

14. Connect the conductors L1, L2 and L3 to the terminals L1, L2 and L3 according to the label. Ensure that the assignment is correct.

15.

Danger of crushing when locking levers snap shut

The locking levers close by snapping down fast and hard.

• Press the locking levers of the connecting terminal plate for the AC cable down with your thumb only. Do not grip the entire connecting terminal plate for the AC cable between finger and thumb and keep fingers out from under the locking levers.

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

17. Ensure that all locking levers of the connecting terminal plate are closed and all conductors are tightly connected.

6.3.3 Connecting Additional Grounding

The inverter is equipped with a grounding terminal with two connection points on the DC side for additional grounding (e.g. use of a grounding electrode).

The grounding terminal is yellow/green and identified as follows:

• Equipment grounding terminal: symbol

• Grounding electrode conductor: labeling GEC

Cable requirements:

☐ The cable must be designed in accordance with the local installation requirements and for

temperatures of over +90°C (+194°F).

☐ Cable type: copper wire ☐ Conductor cross-section: 10mm²to35mm² (8AWGto2AWG)

Requirement:

☐ The conduits must be correctly connected to the inverter.

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Procedure:

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. If the protective cover is mounted, loosen the screws of the DC protective cover using an Allen key (AF 3) and remove the DC protective cover.

3. Lead the equipment grounding conductor or the cable of the grounding electrode through the installed conduit into the inside of the inverter.

4. Strip the equipment grounding conductor or the cable of the grounding electrode by 18mm (0.71in).

5. Connect the equipment grounding conductor to the connection point with the symbol and tighten with a screwdriver (blade width: 6mm (0.24in)) (torque: 5.8Nm (51in-lb)).

6. Connect the grounding electrode cable to the connection point GEC and tighten with a screwdriver (blade width: 6mm (0.24in)) (torque: 5.8Nm (51in-lb)).

7. Make sure the equipment grounding conductor or the grounding electrode cable is firmly in place.

8. Reattach the DC protective cover. Tighten all four screws with an Allen key (AF3) in the order 1 to 4 (torque: 3.5Nm (31in-lb)).

SMA Solar Technology AG

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 thresholds for the input voltage and the input current of the inverter must be adhered to

(see Section14 "Technical Data", page69).

☐ The maximum input current per string must be maintained (see Section14 "Technical Data",

page69).

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6 Electrical Connection

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

☐ Depending on the number of strings, one or two conduits made of metal: 25.4mm (1in) ☐ Depending on the number of conduits, one or two UL-listed rain-tight conduit fittings for wet

locations complying with UL514B: 25.4mm (1in)

☐ For closing unused enclosure openings for the DC connection: UL-listed type 3R filler plugs

Cable requirements:

☐ The DC cables must be approved for temperatures of over +90°C (+194°F). ☐ The maximum cable length subject to conductor cross-section must be observed. ☐ Cable type: copper wire ☐ Only use solid wire or stranded wires. ☐ Conductor cross-section: 10mm²to35mm² (8AWGto2AWG) ☐ The DC cables must be sized in accordance with the installation requirements applicable on

site.

6.4.2 Connecting the PV Array

Requirements:

☐ A means of disconnecting the inverter from the PV array must be present. ☐ The grounding of the PV system must be executed as per the specifications of Paragraph

690.41 to 690.47 of the National Electrical Code® ANSI/NFPA 70 and is the responsibility of the installer.

☐ All electrical installations must be carried out in accordance with the local standards and the

National Electrical Code® ANSI/NFPA70 or the Canadian Electrical Code® CSAC22.1.

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from the utility grid and ensure that it cannot be reconnected.

• Disconnect the inverter from the PV array and ensure that it cannot be reconnected.

2. If the lower enclosure lid is mounted, loosen all screws of the lower enclosure lid using an Allen key (AF3) and lift the enclosure lid from below and remove it.

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3. Release the screws of the DC protective cover using an Allen key (AF3) and remove the DC protective cover.

Damage to the inverter due to moisture and dust intrusion

Electronic components in the inverter can be destroyed or damaged as a result of dust or moisture intrusion. The enclosure openings are suitable for conduits of 25.4mm (1in).

• Only use one opening per string.

• Do not enlarge the enclosure openings.

5. Remove the adhesive tape from both openings.

6. Insert one conduit fitting for each string into the opening and tighten from the inside using the counter nut.

7. Attach one conduit for each string to the opening.

8. Insert the DC cables through the conduit into the interior of the inverter.

9. Strip the insulation of the DC cables by 18mm (0.71in).

10. For connecting the string to INPUT A, connect the DC cables to the connecting terminal plate for the DC connection:

• Connect the positive DC cable to the red terminal A+ and tighten with a screwdriver (torque: 5.8Nm (51in-lb)).

• Connect the negative DC cable to the black terminal A- and tighten with a screwdriver (torque: 5.8Nm (51in-lb)).

11. For connecting the string to INPUT B, connect the DC cables to the connecting terminal plate for the DC connection:

• Connect the positive DC cable to the red terminal B+ and tighten with a screwdriver (torque: 5.8Nm (51in-lb)).

• Connect the negative DC cable to the black terminal B- and tighten with a screwdriver (torque: 5.8Nm (51in-lb)).

12. Ensure that all DC cables are securely in place.

13. Close unused enclosure openings with UL-listed type 3R filler plugs.

14. If required, you must connect additional grounding or equipotential bonding (see Section6.3.3, page31).

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15. If no additional grounding is to be connected, reattach the DC protective cover. Tighten all four screws with an Allen key (AF3) in the order 1 to 4 (torque: 3.5Nm (31in-lb)).

6 Electrical Connection

6.5 Connecting the Inverter to the Network

Cable requirements:

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

☐ Cable type: 100BaseTx

SMA recommends cable type "SMA COMCAB-OUTxxx" for outdoor use and cable type "SMA COMCAB-INxxx" for indoor use, available in lengths xxx = 100m (328ft), 200 m (656ft), 500m (1,640ft), 1,000m (3,281ft)

☐ 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 (2x2x24AWG)

☐ Maximum cable length between two nodes when using patch cables: 50m (164ft) ☐ Maximum cable length between two nodes when using installation cables: 100m (328ft) ☐ UV-resistant for outdoor use

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. Connect one end of the network cable to the inverter:

• Remove the filler plugs from the network connection opening on the inverter.

• Attach the conduit to the opening.

• Lead the network cable through the conduit into the interior of the inverter.

• Release the screw of the display far enough to allow the display to be flipped up.

• Flip the display up until it snaps into place.

• Insert the network cable into one of the network jacks of the Webconnect Data Module.

• Flip the display down and fasten the display screw hand-tight.

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3. Connect the other end of the network cable directly to the computer or router or connect it to another node. You can only connect the inverter to other nodes via star topology.

4. Commission the inverter (see Section7, page37).

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7 Commissioning the Inverter

Requirements:

☐ The circuit breaker must be correctly rated. ☐ A means of disconnecting the inverter from the PV array must be present. ☐ The inverter must be correctly mounted and closed. ☐ All cables must be correctly connected to the terminals. ☐ Unused openings for the DC connection in the inverter enclosure must be closed with UL-listed

type 3R filler plugs.

☐ Unused openings for the Ethernet connection or the communication connection in the inverter

enclosure must be sealed tightly. The factory-mounted filler plugs can be used for that purpose.

Procedure:

1. Make sure that the AC cable is routed so that it cannot be damaged by the partition in the lower enclosure lid.

2. Insert the lower enclosure lid from above and flip it down. The screws must protrude from the lower enclosure lid.

3. Tighten all six screws with an Allen key (AF3) in the order1 to6 (torque: 2.0Nm (17.7in-lb)).

4. Switch on all DC disconnectors between the inverter and the PV array.

5. Switch on the circuit breaker and all AC disconnectors.

☑ The green LED is glowing. Feed-in operation begins. ✖ Green LED is flashing?

The DC input voltage is still too low.

• Once the DC input voltage is sufficiently high, feed-in operation begins.

✖ The red LED is glowing?

There is probably an error.

• Rectify the error (see Section10 "Troubleshooting", page43).

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8 Configuration

8.1 Integrating the Inverter into the Network

If the router supports DHCP and DHCP is enabled, the inverter will automatically be integrated into the network. You will not need to carry out network configuration.

If the router does not support DHCP, automatic network configuration will not be possible and you will need to use the SMA Connection Assist to integrate the inverter into the network.

Requirements:

☐ The inverter must be in operation. ☐ There must be a router with Internet connection in the local network of the system. ☐ The inverter must be connected to the router.

Procedure:

• Integrate the inverter into the network by means of the SMAConnectionAssist. Download the SMA Connection Assist and install it on the computer (see www.SMA-Solar.com).

8.2 Changing Operating Parameters

This section describes the basic procedure for changing operating parameters. Always change operating parameters as described in this section. Some parameters that have sensitive functions can only be viewed and changed by qualified persons (for further information on changing parameters, refer to the manual of the communication product).

The operating parameters of the inverter are set to certain values by default. To optimize inverter operation, you can change the operating parameters using a communication product.

Requirements:

☐ Depending on the type of communication, a computer with Ethernet interface must be

available.

☐ A communication product corresponding to the type of communication used must be

available.

☐ The inverter must be registered in the communication product. ☐ The changes to the grid-relevant parameters must be approved by the responsible 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).

Procedure:

1. Call up the user interface of the communication product or software and log in as Installer or User.

2. If required, enter the SMAGridGuardcode.

3. Select and set the required parameter.

4. Save settings.

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8 Configuration

8.3 Setting the Active Power Limitation in case of PV System Control Failure

You will need to set the active power limitation in case of PV system control failure if the active power limitation of the inverter is controlled by a communication product. By setting the active power limitation in case of PV system control failure, you ensure that the inverter will still feed the maximum permissible PV power into the utility grid, even if communication between inverter and communication product has failed. The default setting of the inverter is 100%.

The basic procedure for changing operating parameters is explained in another section (see Section8.2 "Changing Operating Parameters", page38).

8.4 Deactivating the Arc-Fault Circuit Interrupter (AFCI)

The basic procedure for changing operating parameters is explained in another section (see Section8.2 "Changing Operating Parameters", page38).

Procedure:

• Select the parameter AFCI switched on or AfciIsOn and set to No.

8.5 Setting SMA OptiTrac Global Peak

For partially shaded PV modules, activate SMA OptiTrac Global Peak and set the interval at which the inverter is to optimize the MPP of the PV system.

The basic procedure for changing operating parameters is explained in another section (see Section8.2 "Changing Operating Parameters", page38).

Procedure:

1. Select the parameter OptiTracGlobalPeak switched on or MPPShdw.IsOn and set to On.

2. Select the parameter Cycle time of the OptiTrac Global Peak algorithm or MPPShdw.CycTms 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.

8.6 Adjustable Parameters

You can change the following parameters for voltage and frequency monitoring with a communication product (e.g. SunnyExplorer) (see Section8.2 "Changing Operating Parameters", page38).

Name Value/range Default value

Voltage monitoring median maximum threshold

(Overvoltage/Fast)

Voltage monitoring lower maximum threshold

(Overvoltage/Slow)

Installation Manual 39STP12-24TL-US-IA-en-16

277.0V to 332.4V 332.4 V

277.0V to 332.4V 304.7 V

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SMA Solar Technology AG

Name Value/range Default value

Voltage monitoring upper minimum threshold (Un-

138.5V to 277.0V 243.8 V

dervoltage/Slow)

Voltage monitoring of median minimum threshold

138.5V to 277.0V 138.5 V

(Undervoltage/Fast)

Voltage monitoring median max. threshold trip.time

0.1sto6,000s 0.16s

(Overvoltage/Fast, maximum time)

Voltage monitoring lower max. threshold trip. time

0.1sto6,000s 1.0s

(Overvoltage/Slow, maximum time)

Voltage monitoring upper min. threshold trip. time

0.1sto1,000s 2.0s

(Undervoltage/Slow, maximum time)

Voltage monitoring median min. threshold trip.time

0.1sto1,000s 0.16s

(Undervoltage/Fast, maximum time)

Frequency monitoring lower maximum threshold

50 Hz to 65 Hz 60.5 Hz

(Overfrequency)

Frequency monitoring upper minimum threshold

44 Hz to 60 Hz 59.3 Hz

(Underfrequency)

Frq. monitoring lower max. threshold trip. time

0.1sto9,000s 0.16s

(Overfrequency, maximum time)

Frq. monitoring upper min. threshold trip. time (Un-

0.1sto30,000s 0.16s

derfrequency, maximum time)

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9 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.

Damage to seals on the enclosure lids in subfreezing conditions

If you open the upper and lower enclosure lids when temperatures are below freezing, the enclosure seals can be damaged. This can lead to moisture entering the inverter.

• Do not open the inverter at ambient temperatures lower than -5°C (23°F).

Destruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 1,000 V or higher.

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from the utility grid and ensure that it cannot be reconnected.

• Disconnect the inverter from the PV array and ensure that it cannot be reconnected.

2. Wait five minutes until the LEDs on the inverter switch off.

3. Release all screws of the lower enclosure lid using an Allen key (AF3).

4. Lift and remove the lower enclosure lid from below.

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5. Loosen the screws of the DC protective cover using an Allen key (AF3) and remove the DC protective cover.

6. Use a suitable measuring device to ensure that no voltage is present at the DC terminals.

7. Use a suitable measuring device to ensure that no voltage is present at the AC terminals.

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10 Troubleshooting

10.1 Cleaning the Inverter

Damage to the inverter due to the use of cleaning agents

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

• Ensure that the inverter is free of dust, foliage and other dirt.

10.2 Event Messages

Event number Message, cause and corrective measures

101 to 103

202 to 203

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 SMAServiceLine.

Grid fault

The utility grid has been disconnected, the AC cable is damaged or the grid voltage at the connection point of the inverter is too low. The inverter has disconnected from the utility grid.

Corrective measures:

1. Make sure that the circuit breaker is switched on.

2. Make sure that the AC cable is not damaged.

3. Make sure that the AC cable is correctly connected.

4. 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 SMAServiceLine.

Installation Manual 43STP12-24TL-US-IA-en-16

10 Troubleshooting

Event number Message, cause and corrective measures

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:

• 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 SMAServiceLine.

401

Grid fault

The inverter is no longer in grid-parallel operation. The inverter has stopped feeding into the utility grid.

Corrective measures:

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

404

Grid fault

The inverter is no longer in grid-parallel operation. The inverter has stopped feeding into the utility grid.

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. The grid operator must approve changes to the operating parameters of the inverter.

If the grid operator gives its approval, discuss any changes to the operating parameters with the SMAServiceLine.

SMA Solar Technology AG

Installation ManualSTP12-24TL-US-IA-en-1644

SMA Solar Technology AG

Event number Message, cause and corrective measures

601

Grid fault

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

Corrective measures:

1. Check the grid connection for direct current.

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

701

Frq. not permitted > Check parameter

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. The grid operator must approve changes to the operating parameters of the inverter.

If the grid operator gives its approval, discuss any changes to the operating parameters with the SMAServiceLine.

901

PE conn. missing > Check connection

The grounding conductor is not correctly connected.

Corrective measures:

• Ensure that the grounding conductor is correctly connected (see Section6.3 "AC Connection", page28).

1302

Waiting for grid voltage > Installation failure grid connection > Check grid and fuses

The inverter has detected an error in the AC cabling. The inverter cannot connect to the utility grid.

Corrective measures:

1. Ensure that the AC connection is correct (see Section6.3 "AC Connection", page28).

2. Ensure that the country data set has been configured correctly. Select the parameter Set country standard or CntrySet and check its value.

1501

Reconnection fault grid

The changed country data set or the value of a parameter you have set does not correspond to the local requirements. The inverter cannot connect to the utility grid.

Corrective measures:

• Ensure that the country data set has been configured correctly. Select the parameter Set country standard or CntrySet and check its value.

10 Troubleshooting

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10 Troubleshooting

Event number Message, cause and corrective measures

3301

Unstable operation > Generator output too low

There is not enough power at the DC input of the inverter for stable operation. This may be caused by snow on the PV modules or insufficient irradiation. The inverter interrupts feed-in operation and can no longer connect to the utility grid.

Corrective measures:

1. Wait for higher irradiation.

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

3302

Unstable operation > Abort self-test

Corrective measures:

1. If irradiation is too low, wait for it to increase.

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

3303

Unstable operation > Data storage blocked

Corrective measures:

1. Wait for higher irradiation.

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

SMA Solar Technology AG

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SMA Solar Technology AG

Event number Message, cause and corrective measures

3401 to 3402

DC overvoltage > Disconnect generator

Overvoltage at the DC input. This can destroy the inverter.

Corrective measures:

1. Immediately disconnect the inverter from all voltage sources (see Section9, page41).

2. 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 is above the maximum input voltage of the inverter, ensure that the PV array has been correctly rated or contact the installer of the PV array.

3. If this message is repeated frequently, contact the SMAServiceLine.

3501

Insulation resistance > Check generator

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

Corrective measures:

• Check the PV system for ground faults (see Section10.5, page57).

3601

High discharge curr. > Check generator

The leakage currents of the inverter and the PV array are too high. There is a ground fault, a residual current or a malfunction.

The inverter interrupts feed-in operation immediately after exceeding a threshold and then automatically reconnects to the utility grid. If this process happens five times a day, the inverter disconnects from the utility grid and terminates feed-in.

Corrective measures:

• Check the PV system for ground faults (see Section10.5, page57).

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10.5, page57).

3801 to 3802

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.

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10 Troubleshooting

Event number Message, cause and corrective measures

3901 to 3902

Waiting for DC start conditions > Start cond. not met

The feed-in conditions for the utility grid are not yet fulfilled.

Corrective measures:

1. Wait for higher irradiation.

2. If this message is displayed frequently in the morning, increase the voltage limit for starting grid feed-in. Change the parameter Minimum voltage input or A.VStr, B.VStr.

3. If this message is displayed frequently with medium irradiation, ensure that the PV array is correctly rated.

4301

Serial el.arc in String detected by AFCI mod.

The inverter has detected an electric arc. The inverter interrupts grid feed-in and cannot connect to the utility grid.

Corrective measures:

• Reset the operation inhibition (see Section10.6, page60).

6001 to 6438

Self diagnosis > Interference device

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

6501 to 6511

Self diagnosis > Interference device

The inverter has switched off due to excessive temperature.

Corrective measures:

1. Clean the fans (see Section10.3, page54).

2. Ensure that the inverter has sufficient ventilation.

6512

Minimum operating temperature not reached

The inverter will only recommence grid feed-in once the temperature has reached at least −25°C (−13°F).

6603 to 6604

Self-diagnosis > Overload

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

6606

Interference device

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

SMA Solar Technology AG

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SMA Solar Technology AG

Event number Message, cause and corrective measures

6701 to 6702

Communication disturbed

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

6801 to 6802

Self-diagnosis > Input A defective

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

6901 to 6902

Self-diagnosis > Input B defective

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

7001 to 7002

Sensor fault fan permanently on

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

7101

SD card defective

The SD memory card is not formatted.

Corrective measures:

• Re-format the SD memory card.

• Re-save the files to the SD memory card.

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.

Update file on the memory card is defective.

Corrective measures:

• Reformat the memory card.

• Re-save the files to the memory card.

10 Troubleshooting

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10 Troubleshooting

Event number Message, cause and corrective measures

7102

Parameter file not found or defective

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

Corrective measures:

• Copy the parameter file to the correct folder again.

7110

No update file found

No update file has been found.

Corrective measures:

• Copy the update file to the memory card folder. Select the folder \UPDATE.

7201 to 7202

Data stor. not poss.

Internal error. The inverter continues to feed into the utility grid.

Corrective measures:

• Contact the SMAServiceLine.

7303

Update main CPU failed

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

7305

Update RS485I module failed

Update of RS485i module failed.

Corrective measures:

• Retry update.

• If the error recurs, contact the SMA Service Line.

7311

Update language table failed

Updating the language table failed.

Corrective measures:

• Retry update.

• If the error recurs, contact the SMA Service Line.

7316

Update Speedwire module failed

Updating the Speedwire module failed.

Corrective measures:

• Retry update.

• If the error recurs, contact the SMA Service Line.

7324

Wait for update conditions

The inverter has successfully completed the update and is waiting for sufficient DC irradiation.

SMA Solar Technology AG

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SMA Solar Technology AG

Event number Message, cause and corrective measures

7326

Webconnect update failed

Update of Webconnect module failed.

Corrective measures:

• Retry update.

• If the error recurs, contact the SMA Service Line.

7508

External fan fault > Replace fan

One of the fans is blocked.

Corrective measures:

• Clean the fans (see Section10.3, page54).

• If the message continues to be displayed, replace the fan (see Section15 "Spare Parts and Accessories", page75).

7701 to 7703

Self diagnosis > Interference device

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

8001

Derating occurred

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.

• Clean the fans (see Section10.3, page54).

• Ensure that the inverter has sufficient ventilation.

8101 to 8104

Communication disturbed

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

8204

AFCI self-test failed

The cause must be determined by the SMAServiceLine.

Corrective measures:

• Contact the SMAServiceLine.

10 Troubleshooting

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10 Troubleshooting

Event number Message, cause and corrective measures

8206

Electr. arc detected > Please confirm by tapping

The inverter has detected an electric arc and was recommissioned after a disconnection. By tapping, you are confirming that you have repaired any possible damage to PV modules, cables or plugs in the PV system.

Corrective measures:

• Tap on the enclosure lid within ten seconds of the message appearing in order to recommission the inverter.

8708

Timeout in communication for active power limitation

Communication to the system control absent. Depending on the fall-back setting, either the last received values will be retained or the active power will be limited to the set percentage value of the inverter nominal power.

Corrective measures:

• Ensure that the connection to the system manager (e.g. SunnyHomeManager) is intact and that no cables are damaged or that no plugs have been pulled.

8709

Timeout in communication for reactive power spec.

Communication to the system control absent. Depending on the fall-back setting, either the last received values will be retained or the reactive power will be set to the set value.

Corrective measures:

• Ensure that the connection to the system manager (e.g. SunnyHomeManager) is intact and that no cables are damaged or that no plugs have been pulled.

8710

Timeout in communication for cos-Phi spec.

Communication to the system control absent. Depending on the fall-back setting, either the last received values will be retained or the displacement power factor will be set to the set value.

Corrective measures:

• Ensure that the connection to the system manager (e.g. SunnyHomeManager) is intact and that no cables are damaged or that no plugs have been pulled.

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.

SMA Solar Technology AG

Installation ManualSTP12-24TL-US-IA-en-1652

SMA Solar Technology AG

Event number Message, cause and corrective measures

9003

Grid parameter locked

The parameters are now locked. You cannot change the parameters.

Corrective measures:

• Unlock the parameters with the SMAGridGuard code.

9005

Changing of grid parameters not possible > Ensure DC supply.

PV power is too low for setting the country data set. As soon as sufficient irradiation is available, the inverter assumes the setting automatically.

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.

27103

Set parameter

The inverter is setting the parameters.

27104

Parameters set successfully

The inverter is setting the parameters.

27107

Update file OK

The update file found is valid.

27108

SD card is read

The inverter is currently reading the SD memory card.

27109

No new update SDcard

There are no update files relevant for this inverter on the SD memory card or the available update has already been carried out.

27304

Update RS485i module

The inverter is updating the 485 Data Module.

27317

Update Speedwire

The inverter is updating the Speedwire data module.

27325

Webconnect update

The inverter is updating the Webconnect Data Module.

27310

Upd. language table

The inverter is updating the Webconnect Data Module.

28205

AFCI self-test successful

The inverter has successfully performed the arc fault detection self-test.

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10 Troubleshooting

Event number Message, cause and corrective measures

29001

29004

Grid Guard code valid

The entered SMA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.

Grid param. unchanged

Changing the grid parameters is not possible.

SMA Solar Technology AG

10.3 Cleaning the Fans

10.3.1 Cleaning the Fan at the Bottom

First clean the fan at the bottom of the inverter and then clean the fan on the left-hand side of the enclosure.

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9 "Disconnecting the Inverter from Voltage Sources", page41).

2. Wait for the fan to stop rotating.

3. Remove the fan guard and clean it:

• Use a screwdriver to push the two locking tabs at the right-hand edge of the fan guard to the right-hand side and remove them from the retainer.

• Carefully remove the fan guard.

• Clean the fan guard with a soft brush, a paint brush, a cloth or compressed air.

4. Press the locking tabs on the fan toward the center of the fan.

5. Carefully remove the fan from the inverter.

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SMA Solar Technology AG

10 Troubleshooting

6. Release and remove the fan plug.

Damage to the fan due to compressed air

• Clean the fan only with a soft brush, a paint brush, or a damp cloth.

8. After cleaning, insert the fan plug back into the pin connector until it snaps into place.

9. Insert the fan into the inverter until it snaps into place.

10. Push the fan guard into the retainer until it snaps into place.

11. Clean the fan on the left-hand side of the enclosure (see Section10.3.2 "Cleaning the Fan on the Left-Hand Side of the Enclosure", page55).

10.3.2 Cleaning the Fan on the Left-Hand Side of the Enclosure

Danger to life due to electric shock

• Ensure that the inverter is disconnected from all voltage sources (see Section9 "Disconnecting the Inverter from Voltage Sources", page41).

2. Remove the ventilation grids on the left-hand and right-hand sides and clean them:

• Turn the rotary fastener of the ventilation grid with a flat-blade screwdriver until the notch is in a vertical position.

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10 Troubleshooting

SMA Solar Technology AG

• Remove the ventilation grid. Use a screwdriver to gently lever open the ventilation grid.

• Clean the ventilation grid with a soft brush, a paint brush, or compressed air.

Damage to the inverter due to foreign bodies

• Do not remove the ventilation grids permanently, otherwise foreign bodies could penetrate the enclosure.

4. Wait for the fan to stop rotating.

5. Press the locking tabs on the fan toward the center of the fan.

6. Carefully remove the fan from the inverter.

7. Release and remove the fan plug.

Damage to the fan due to compressed air

• Clean the fan only with a soft brush, a paint brush, or a damp cloth.

9. After cleaning, insert the fan plug into the pin connector until it snaps into place.

10. Insert the fan into the inverter until it snaps into place.

11. Attach the ventilation grids on the right-hand and left-hand side of the inverter:

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SMA Solar Technology AG

• Reinsert the ventilation grid until it snaps into place.

• Turn the rotary lock of the ventilation grid with a flat-blade screwdriver until the slot is in a horizontal position and the arrows point to the right.

• Ensure that the ventilation grid is securely in place.

12. Recommission the inverter (see Section11, page61).

13. Check the fans to ensure that they are working properly (see Section10.4, page57).

10 Troubleshooting

10.4 Checking the Function of the Fans

You can check the function of the fans by setting a parameter. The basic procedure for changing operating parameters is described in the manual of the inverter

or the communication product (see the operating manual of the inverter or communication product).

Procedure:

1. Select the parameter Fan test or FanTst and set to On.

2. Save settings.

3. Check whether air is being drawn in through the bottom and is coming out of the upper ventilation grids and whether the fans are making any unusual noises.

If no air is being drawn in through the bottom, no air is coming out of the ventilation grids, or the fans are making unusual noises, then the fans were presumably installed improperly. Check whether the fans have been installed correctly.

If the fans were installed correctly, contact Service (see Section17, page77).

4. Select the parameter Fan test or FanTst and set to Off.

5. Save settings.

10.5 Checking the PV System for Ground Faults

If the red LED is glowing and the and the event number 3501, 3601 or 3701 is displayed in the comunication product (e.g. Sunny Portal), this could indicate a ground fault. The electrical insulation from the PV system to ground is defective or insufficient.

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10 Troubleshooting

SMA Solar Technology AG

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.

Destruction of the measuring device due to overvoltage

• Only use measuring devices with a DC input voltage range of 1,000 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 to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. Measure the voltages:

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

• 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.

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SMA Solar Technology AG

10 Troubleshooting

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 (see Section11, page61).

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.

Required devices:

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

Procedure:

1. Calculate the expected insulation resistance per string.

Danger to life due to high voltages

• Disconnect the inverter from all voltage sources (see Section9, page41).

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.

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10 Troubleshooting

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

11. Reconnect all other strings to the inverter.

12. Recommission the inverter (see Section11, page61).

13. If the inverter still displays an insulation error, contact the Service (see Section17 "Contact", page77). The PV modules might not be suitable for the inverter in the present quantity.

SMA Solar Technology AG

10.6 Resetting the Operation Inhibition after Detection of an Arc Fault

If the red LED is glowing and the event number 4301 is displayed in the communication product (e.g. SunnyPortal), the inverter has detected an electric arc and interrupts feed-in operation.

Requirement:

☐ A communication product corresponding to the type of communication used must be

available.

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. Ensure that the PV modules, the connected cables and plugs are not defective. Repair or replace defective PV modules, cables or plugs.

3. Recommission the inverter (see Section7, page37).

4. Access the user interface of the communication product.

5. Reset the operation inhibition by setting one of the following parameters:

• Select the parameter Reset operating data or Op.FncSetIstl and set to Reset operation inhibition or RSPermStopOp. This effects resetting of the operation inhibition and the inverter will start feeding in again.

• Select the parameter AFCI switched on or AfciIsOn and set to No and then back to Yes. This effects resetting of the operation inhibition and the inverter will start feeding in

again.

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SMA Solar Technology AG

11 Recommissioning the Inverter

If you have disconnected the inverter from all voltage sources (e.g. for configuration purposes) and want to recommission it, proceed as follows.

Requirements:

☐ The inverter must be correctly mounted. ☐ All cables must be correctly connected to the terminals. ☐ Unused openings for the DC connection in the inverter enclosure must be closed with UL-listed

type 3R filler plugs.

☐ Unused openings for the Ethernet connection or the communication connection in the inverter

enclosure must be sealed tightly. The factory-mounted filler plugs can be used for that purpose.

Procedure:

1. Ensure that all DC cables are securely in place.

2. Reattach the DC protective cover. Tighten all four screws with an Allen key (AF3) in the order 1 to 4 (torque: 3.5Nm (31in-lb)).

3. Make sure that the AC cable is routed so that it cannot be damaged by the partition in the lower enclosure lid.

4. Insert the lower enclosure lid from above and flip it down. The screws must protrude from the lower enclosure lid.

5. Tighten all six screws with an Allen key (AF3) in the order1 to6 (torque: 2.0Nm (17.7in-lb)).

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11 Recommissioning the Inverter

6. Switch on all DC disconnectors between the inverter and the PV array.

7. Switch on the circuit breaker and all AC disconnectors.

☑ The green LED is glowing. Feed-in operation begins. ✖ Green LED is flashing?

The DC input voltage is still too low.

• Once the DC input voltage is sufficiently high, feed-in operation begins.

✖ The red LED is glowing?

There is probably an error.

• Rectify the error (see Section10 "Troubleshooting", page43).

SMA Solar Technology AG

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SMA Solar Technology AG

12 Decommissioning the Inverter

To decommission the inverter completely upon completion of its service life, proceed as described in this Section. If the inverter is defective and you have received a replacement device, observe the information on how to proceed when receiving a replacement device (see Section13 "Procedure for Receiving a Replacement Device", page65).

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

• If the inverter is to be transported and lifted with a crane, remove the filler plugs on the top of the inverter and screw the eye bolts into the threads.

Procedure:

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. Disconnect the DC cables from the connecting terminal plate for the DC connection using a screwdriver.

3. Remove the AC cable from the inverter. Press the locking levers all the way upward and pull the conductors out of the connecting terminal plate for the AC cable.

4. Press down the locking levers of the connecting terminal plate for the AC cable.

5. Remove all connected grounding cables from the grounding terminal.

6. If the multi-function relay or the SMAPowerControlModule are used, remove the connection cable from the inverter.

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12 Decommissioning the Inverter

SMA Solar Technology AG

7. If other cables (e.g. data cables or network cables) are connected, remove them from the inverter.

8. Remove all conduits with cables from the inverter.

9. Close all enclosure openings.

10.

Risk of burns due to hot enclosure parts

• Wait 30 minutes before disassembling the inverter. This will allow the enclosure to cool down and thus prevent burn injuries.

11. Remove the inverter by lifting it vertically up and off the wall mounting bracket.

12. Place the lower enclosure lid on the inverter from above and flip down. The screws must protrude from the lower enclosure lid.

13. Tighten all six screws in the lower enclosure lid with an Allen key (AF3) in the order 1 to 6 (torque: 2Nm ± 0.3Nm). By tightening the screws in the prescribed order, you avoid warping the lid, which would keep it from sealing correctly. Useful hint: If the screws fall out of the lower enclosure lid, insert the long screw into the lower middle hole and the five short screws into the other holes.

14. Release the screws from the wall mounting bracket and take the bracket off the wall.

15. If the inverter is to be stored or shipped, pack the inverter and the wall mounting bracket. Use the original packaging or packaging that is suitable for the weight and dimensions of the inverter and secure with tension belts if necessary.

16. Dispose of the inverter in accordance with the locally applicable disposal regulations for electronic waste.

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SMA Solar Technology AG

13 Procedure for Receiving a Replacement Device

Under fault conditions, the inverter may need to be replaced. If this is the case, you will receive a replacement device from SMA. If you received a replacement device, replace the defective inverter with the replacement device as described in this section.

Procedure:

• Decommission the defective inverter.

• Commission the replacement device.

• Ship the defective inverter.

Decommissioning the Defective Inverter

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

• If the inverter is to be transported and lifted with a crane, remove the filler plugs on the top of the inverter and screw the eye bolts into the threads.

Danger to life due to electric shock

• Disconnect the inverter from all voltage sources (see Section9, page41).

2. Disconnect the DC cables from the connecting terminal plate for the DC connection using a screwdriver.

3. Remove the AC cable from the inverter. Press the locking levers all the way upward and pull the conductors out of the connecting terminal plate for the AC cable.

Installation Manual 65STP12-24TL-US-IA-en-16

13 Procedure for Receiving a Replacement Device

SMA Solar Technology AG

4. Press down the locking levers of the connecting terminal plate for the AC cable.

5. Remove all connected grounding cables from the grounding terminal.

6. If the multi-function relay or the SMAPowerControlModule are used, remove the connection cable from the inverter.

7. If other cables (e.g. data cables or network cables) are connected, remove them from the inverter.

8. Remove any installed interfaces from the inverter (see the manual for the communication interface).

9. Remove all conduits with cables from the inverter.

10. Close all enclosure openings.

11. Keep the DC load-break switch in a safe place as the replacement device will be delivered without the DC load-break switch.

12.

Risk of burns due to hot enclosure parts

• Wait 30 minutes before disassembling the inverter. This will allow the enclosure to cool down and thus prevent burn injuries.

13. Remove the inverter by lifting it vertically up and off the wall mounting bracket.

Commissioning the Replacement Device

Damage to seals on the enclosure lids in subfreezing conditions

If you open the upper and lower enclosure lids when temperatures are below freezing, the enclosure seals can be damaged. This can lead to moisture entering the inverter.

• Do not open the inverter at ambient temperatures lower than -5°C (23°F).

Damage to the inverter due to moisture and dust intrusion

Dust or moisture intrusion can damage the inverter and impair its functionality.

• Close all enclosure openings of the inverter tightly.

• Never open the inverter when it is raining or snowing, or the humidity is over 95%.

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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SMA Solar Technology AG

13 Procedure for Receiving a Replacement Device

1. Mount the replacement device (see Section5, page19) and make the electrical connections (see Section6, page25).

2. If needed, install interfaces in the replacement device and connect the interfaces (see the interface manual).

3. If there is a label with "transport lid" affixed to the upper lid of the replacement device, replace the upper enclosure lid of the replacement device with the upper enclosure lid of the defective inverter.

Danger to life due to high voltages

Wait 20minutes before removing the upper enclosure lid to allow residual voltages to discharge.

• Loosen the screws of the upper enclosure lid using an Allen key (AF4) and remove the enclosure lid.

• Position the upper enclosure lid with the six screws and conical spring washers on the enclosure and tighten it using an Allen key (AF4) in the order 1 to 6 (torque: 6Nm ±

0.3Nm).

4. Insert the lower enclosure lid from above and flip it down. Use the enclosure lid of the defective inverter for this if there is a label with "transport lid" affixed to the enclosure lid of the replacement device. The screws must protrude from the lower enclosure lid.

5. Tighten all six screws in the lower enclosure lid with an Allen key (AF3) in the order 1 to 6 (torque: 2Nm ± 0.3Nm). By tightening the screws in the prescribed order, you avoid warping the lid, which would keep it from sealing correctly. Useful hint: If the screws fall out of the lower enclosure lid, insert the long screw into the lower middle hole and the five short screws into the other holes.

6. Commission the replacement device (see Section7, page37). Remount the DC load-break switch of the defective inverter to the replacement device.

7. Configure the replacement device (see Section8, page38).

8. Replace the replacement device in the communication product.

Shipping the Defective Inverter

1. If necessary, position the upper enclosure lid with the six screws and conical spring washers on the enclosure and tighten it using an Allen key (AF4) in the order 1 to 6 (torque: 6Nm ±

0.3Nm).

2. Insert the lower enclosure lid from above and flip it down. The screws must protrude from the lower enclosure lid.

Installation Manual 67STP12-24TL-US-IA-en-16

13 Procedure for Receiving a Replacement Device

SMA Solar Technology AG

3. Tighten all six screws in the lower enclosure lid with an Allen key (AF3) in the order 1 to 6 (torque: 2Nm ± 0.3Nm). By tightening the screws in the prescribed order, you avoid warping the lid, which would keep it from sealing correctly. Useful hint: If the screws fall out of the lower enclosure lid, insert the long screw into the lower middle hole and the five short screws into the other holes.

4. Pack the defective inverter in the packaging of the replacement device and arrange with SMA for it to be picked up.

Installation ManualSTP12-24TL-US-IA-en-1668

SMA Solar Technology AG

14 Technical Data

14.1 DC/AC

14.1.1 SunnyTripower 12000TL-US/ 15000TL-US/ 20000TL-US

DC Input

STP 12000TL-

US-10

STP 15000TL-

US-10

STP 20000TL-

US-10

Maximum DC power at cosφ=1 12,250 W 15,300 W 20,400 W

Maximum input voltage 1,000V 1,000V 1,000V

MPP voltage range 300 Vto800V 300 Vto800V 380 Vto800V

Rated input voltage 675V 675V 695V

Minimum input voltage 150V 150V 150V

Initial input voltage 188V 188V 188V

Maximum input current input A 33A 33A 33A

Maximum input current input B 33A 33A 33A

Maximum short-circuit current per

43 A 43 A 43A

string

Maximum residual input current 1,187A

Duration of the maximum residual in-

0.0072s 0.0072s 0.0072s

1,187A

put current

Number of independent MPP inputs 2 2 2

Strings per MPP input 1 1 1

AC Output

STP 12000TL-

US-10

Rated power at 277V, 60Hz 12,000 W 15,000 W 20,000 W

Maximum apparent AC power 12,000VA 15,000VA 20,000VA

Rated grid voltage 480 / 277 WYE 480 / 277 WYE 480V / 277V

AC voltage range 243.7V to

304.7V

Nominal AC current at 277V 14.5A 18.1 A 24.1A

Maximum output current 14.5A 18.1 A 24.1A

STP 15000TL-

US-10

243.7V to

304.7V

STP 20000TL-

US-10

WYE

243.7V to

304.7V

Installation Manual 69STP12-24TL-US-IA-en-16

14 Technical Data

SMA Solar Technology AG

Total harmonic distortion of the output

STP 12000TL-

US-10

≤ 3% ≤ 3% ≤ 3%

STP 15000TL-

US-10

STP 20000TL-

US-10

current with total harmonic distortion of the AC voltage <2%, and AC power >50% of the rated power

Maximum residual output current 142.5A

Duration of the maximum residual out-

0.0131s 0.0131s 0.0131s

142.5A

put current

Line synchronization characteristics /

Method 2 Method 2 Method 2

In-rush current

Rated power frequency 60Hz 60Hz 60Hz

Operating range at AC power frequency 60Hz

Maximum utility backfeed current to

59.3Hz to

60.5Hz

59.3Hz to

60.5Hz

– – –

59.3Hz to

60.5Hz

utility

Limits of accuracy of voltage measure-

2% 2% 2%

ment

Limits of accuracy of frequency mea-

±0.1Hz ±0.1Hz ±0.1Hz

surement

Limits of accuracy of time measure-

±0.1% ±0.1% ±0.1%

ment at nominal trip time

Output power at +60°C (+140°F) 12,000 W 15,000 W 17,000 W

Maximum power operating ambient

+45°C (+113°F) +45°C (+113°F) +45°C (+113°F)

temperature

Power factor at rated power 1 1 1

Displacement power factor, adjustable 0

overexcited

underexcited

to 0

overexcited

underexcited

to 0

overexcited

underexcited

to 0

Feed-in phases 3 3 3

Connection phases 3 3 3

Overvoltage category in accordance

IV IV IV

with UL1741

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SMA Solar Technology AG

Efficiency

14 Technical Data

Maximum efficiency, η

CEC efficiency, η

CEC

max

STP 12000TL-

US-10

98.2% 98.2% 98.5%

97.5% 97.5% 97.5%

STP 15000TL-

US-10

STP 20000TL-

14.1.2 Sunny Tripower 24000TL-US

DC Input

STP 24000TL-US-10

Maximum DC power at cosφ=1 24,500 W

Maximum input voltage 1,000V

MPP voltage range 450 Vto800V

Rated input voltage 712V

Minimum input voltage 150V

Initial input voltage 188V

Maximum input current input A 33A

Maximum input current input B 33A

Maximum short-circuit current per string 43A

Maximum residual input current 1,187A

Duration of the maximum residual input current 0.0072s

Number of independent MPP inputs 2

Strings per MPP input 1

US-10

AC Output

STP 24000TL-US-10

Rated power at 277V, 60Hz 24,000 W

Maximum apparent AC power 24,000VA

Rated grid voltage 480V / 277V WYE

AC voltage range 243.7V to 304.7V

Nominal AC current at 277V 29A

Maximum output current 29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

Installation Manual 71STP12-24TL-US-IA-en-16

≤ 3%

14 Technical Data

SMA Solar Technology AG

STP 24000TL-US-10

Maximum residual output current 142.5A

Duration of the maximum residual output current 0.0131s

Line synchronization characteristics / In-rush current Method 2

Rated power frequency 60Hz

Operating range at AC power frequency 60Hz 59.3Hz to 60.5Hz

Maximum utility backfeed current to utility –

Limits of accuracy of voltage measurement 2%

Limits of accuracy of frequency measurement ±0.1Hz

Limits of accuracy of time measurement at nominal trip

±0.1%

time

Output power at +60°C (+140°F) 17,000 W

Maximum power operating ambient temperature +45°C (+113°F)

Power factor at rated power 1

Displacement power factor, adjustable 0

overexcited

to 0

underexcited

Feed-in phases 3

Connection phases 3

Overvoltage category in accordance with UL1741 IV

Efficiency

STP 24000TL-US-10

Maximum efficiency, η

CEC efficiency, η

CEC

max

98.5%

98.0%

14.2 General Data

Width x height x depth 665mmx650mmx265mm

(26.18 in x 25.59 in x 10.43 in)

Weight 55kg (121lb)

Length x width x height of the packaging 780mmx380mmx790mm

(30.71 in x 14.96 in x 31.10 in)

Transport weight 61kg (134.5lb)

Operating temperature range −25°C to +60°C

(−13°F to +140°F)

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SMA Solar Technology AG

14 Technical Data

Storage temperature −40°C to +60°C

(−40°F to +140°F)

Maximum permissible value for relative humid-

100%

ity, non-condensing

Maximum operating altitude above mean sea

2,000m (6,562ft)

level

Typical noise emission ≤ 51dB(A)

Power loss in night mode < 1.8W

Maximum data volume per inverter with Speed-

550 MB/month

wire/Webconnect

Additional data volume when using the Sun-

600 kB/hour

nyPortal live interface

Topology Transformerless

Cooling method OptiCool: temperature-controlled fan

Enclosure type rating in accordance with UL50 Type 3R

Protection class I

Grid configurations 480V / 277V WYE

Approvals and national standards, as per 05/2013

CAN/CSA C22.2 No. 107.1-01

UL1741

14.3 Protective Devices

DC reverse polarity protection Short-circuit diode

AC short-circuit current capability Current control

Grid monitoring SMAGridGuard3

Maximum permissible fuse protection 50A

Ground-fault monitoring STP 12000TL-US-10 Insulation monitoring: R

Ground-fault monitoring STP 15000TL-US-10 Insulation monitoring: R

Ground-fault monitoring STP 20000TL-US-10 Insulation monitoring: R

Ground-fault monitoring STP 24000TL-US-10 Insulation monitoring: R

All-pole sensitive residual-current monitoring unit Available

Arc fault detection AFCI, type 1, listed accord-

Available

ing to UL1699B

Installation Manual 73STP12-24TL-US-IA-en-16

> 417kΩ

iso

> 333kΩ

iso

> 250kΩ

iso

> 208kΩ

iso

14 Technical Data

SMA Solar Technology AG

14.4 Climatic Conditions

Extended temperature range −25°C to +60°C

(−13°F to +140°F)

Extended humidity range 0%to100%

Extended air pressure range 79.5kPato106kPa

14.5 Equipment

DC connection Screw terminals

AC connection Spring-cage terminal

SMA Webconnect Data Module RJ45, as standard

14.6 Torques

Upper enclosure lid screws 6.0 Nm (53 in-lb)

Lower enclosure lid screws 2.0 Nm (17.7 in-lb)

Screws for DC protective cover 3.5 Nm (31 in-lb)

Screw for grounding 5,8Nm (51in-lb)

Screw terminal DC input 5.0Nm (44in-lb)

14.7 Data Storage Capacity

Energy yields in the course of the day 63days

Daily yields 30 years

Event messages for users 250 events

Event messages for installers 250 events

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SMA Solar Technology AG

15 Spare Parts and Accessories

You will find the corresponding accessories and spare parts for your product in the following overview. If required, these can be ordered from SMA or your distributor.

Designation Brief description SMA order number

RS485 data module Retrofit kit RS485 communica-

tion interface

SMAConnectionUnit1000-US String-Combiner with DC load-

break switch for connecting eight strings, up to 1,000V

Ventilation grid Ventilation grid set (right and

left) as spare part

DM-485CB-US-10

CU1000-US-10

45-10899080

Installation Manual 75STP12-24TL-US-IA-en-16

16 Compliance Information

SMA Solar Technology AG

16 Compliance Information

FCC Compliance

This device complies with Part 15 of the FCC Rules. Operation is subject to the following conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired operation.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

The user is cautioned that changes or modifications not expressly approved by SMAAmerica,LLC could void the user’s authority to operate this equipment.

IC Compliance

This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

Installation ManualSTP12-24TL-US-IA-en-1676

SMA Solar Technology AG

17 Contact

If you have technical problems with our products, please contact the SMAServiceLine. We need the following information in order to provide you with the necessary assistance:

• Inverter device type

• Inverter serial number

• Inverter firmware version

• Special country-specific settings of the inverter (if applicable)

• Type and quantity of PV modules connected

• Mounting location and altitude of the inverter

• Inverter message

• Optional equipment, e.g. communication products

United States/ Estados Unidos

Canada/ Canadá

SMA America, LLC Rocklin, CA

SMA Canada, Inc. Toronto

Toll free for USA, Canada and Puerto Rico / Llamada gratuita en EE. UU., Canadá y Puerto Rico: +1877-MY-SMATech (+1877-697-6283)

International / Internacional: +1916625-0870

Toll free for Canada / gratuit pour le Canada: +1877-MY-SMATech (+1877-697-6283)

Installation Manual 77STP12-24TL-US-IA-en-16

SMA Solar Technology

www.SMA-Solar.com

SMA STP 12000TL-US User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Information on this Document

1.1 Validity

1.2 Target Group

1.3 Additional Information

1.4 Symbols

1.5 Nomenclature

2 Safety

2.1 Intended Use

2.2 Safety Information

3 Scope of Delivery

4 Product Description

4.2 Interfaces and Functions

5 Mounting

5.1 Requirements for Mounting

5.2 Mounting the Inverter

6 Electrical Connection

6.1 Safety during Electrical Connection

6.2 Overview of the Connection Area

6.2.1 View from Below

6.2.2 Interior View

6.3 AC Connection

6.3.1 Requirements for the AC Connection

6.3.2 Connecting the Inverter to the Utility Grid

6.3.3 Connecting Additional Grounding

6.4 DC Connection

6.4.1 Requirements for the DC Connection

6.4.2 Connecting the PV Array

6.5 Connecting the Inverter to the Network

7 Commissioning the Inverter

8 Configuration

8.1 Integrating the Inverter into the Network

8.2 Changing Operating Parameters

8.3 Setting the Active Power Limitation in case of PV System Control Failure

8.4 Deactivating the Arc-Fault Circuit Interrupter (AFCI)

8.5 Setting SMA OptiTrac Global Peak

8.6 Adjustable Parameters

9 Disconnecting the Inverter from Voltage Sources

10 Troubleshooting

10.1 Cleaning the Inverter

10.2 Event Messages

10.3 Cleaning the Fans

10.3.1 Cleaning the Fan at the Bottom

10.3.2 Cleaning the Fan on the Left-Hand Side of the Enclosure

10.4 Checking the Function of the Fans

10.5 Checking the PV System for Ground Faults

10.6 Resetting the Operation Inhibition after Detection of an Arc Fault

11 Recommissioning the Inverter

12 Decommissioning the Inverter

13 Procedure for Receiving a Replacement Device

14 Technical Data

14.1 DC/AC

14.1.2 Sunny Tripower 24000TL-US

14.2 General Data

14.3 Protective Devices

14.4 Climatic Conditions

14.5 Equipment

14.6 Torques

14.7 Data Storage Capacity

15 Spare Parts and Accessories

16 Compliance Information

17 Contact