Steca coolcept fleX StecaGrid 1511, coolcept fleX StecaGrid 3611, coolcept fleX StecaGrid 2011, coolcept fleX StecaGrid 2511, coolcept fleX StecaGrid 3011 Technical Information

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coolcept fleX

Technical Information

Z02 | 1913 | 763.134

Preface

Thank you for choosing inverters of the coolcept fleX product family of Steca Elektronik GmbH. Through the use of solar energy, you significantly help to protect the environment by reducing the pollution of the atmosphere by the emissions of carbon dioxide (CO other harmful gases.

Manufacturer: Steca Elektronik GmbH Mammostrasse 1 87700 Memmingen, Germany www.steca.com

Phone: 49 (0) 8331 85 58-0 Fax: 49 (0) 8331 85 58-131

Edition: Z02 | March 2019

) and

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Table of contents

1 General information ................................................................... 6

1.1 Types .................................................................................................................... 6

1.2 Accessories .......................................................................................................... 6

1.3 Documents ........................................................................................................... 6

1.4 Monitoring portal ................................................................................................... 6

1.5 Scope of delivery .................................................................................................. 7

1.6 Labelling ............................................................................................................... 7

1.7 Type plate ............................................................................................................. 7

1.8 EU Declaration of Conformity ............................................................................... 8

1.9 Abbreviations ........................................................................................................ 8

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

2.1 General safety instructions ................................................................................... 9

2.2 Designated use ................................................................................................... 10

2.3 Target group ....................................................................................................... 10

2.4 Labels and symbols ............................................................................................ 11

2.4.1 Safety marks ....................................................................................................... 11

2.4.2 Keywords ............................................................................................................ 11

2.5 Safety symbols on the device ............................................................................. 12

3 Structure and functioning ........................................................ 12

3.1 Structure of the inverter ...................................................................................... 12

3.2 Connections ........................................................................................................ 13

3.3 Operating buttons ............................................................................................... 13

3.3.1 Functions of the operating buttons...................................................................... 13

3.4 Display ................................................................................................................ 14

3.5 Cooling ............................................................................................................... 15

3.6 Grid monitoring ................................................................................................... 15

3.7 Data .................................................................................................................... 15

3.7.1 Data communication ........................................................................................... 15

3.7.2 Data display ........................................................................................................ 16

3.7.3 Data storage ....................................................................................................... 16

3.8 Network (TCP/IP)................................................................................................ 16

3.9 "COM1" and "COM2" connections ...................................................................... 17

3.9.1 Connecting further master devices ..................................................................... 17

3.9.2 Connecting further inverters ............................................................................... 18

3.9.3 Fehler! Textmarke nicht definiert.

3.9.4 Alternative RS485 data connecting cable ........................................................... 19

3.9.5 RS485 termination .............................................................................................. 20

3.9.6 RS485 addressing .............................................................................................. 20

3.9.7 Connecting an energy meter (Modbus RTU) ...................................................... 20

3.9.8 Remote shutdown by the grid operator and rapid shutdown

"Teledistacco" (Italy) ........................................................................................... 21

763.134 Z02 1913 coolcept_fleX 3

4 Installing the inverter ............................................................... 22

4.1 Safety instructions for installation ....................................................................... 22

4.2 Mounting the inverter .......................................................................................... 23

4.2.1 Attaching the mounting plate .............................................................................. 23

4.2.2 Fixing the inverter to the mounting plate ............................................................. 24

4.3 Preparing AC connection .................................................................................... 24

4.3.1 Selecting AC cable ............................................................................................. 24

4.3.2 Residual current circuit breaker .......................................................................... 25

4.3.3 Assembling the AC plug ..................................................................................... 25

4.4 Preparing DC connection .................................................................................... 28

4.4.1 Fitting cable to DC plug ...................................................................................... 28

4.4.2 Preparing data connecting cable ........................................................................ 28

4.5 Connecting inverter and switching AC on ........................................................... 29

4.6 Performing initial commissioning ........................................................................ 29

4.7 Setting the feed-in management ......................................................................... 30

4.7.1 Switching the energy meter on or off .................................................................. 30

4.7.2 Limiting the dynamic feed-in value...................................................................... 30

4.7.3 Selecting an energy meter .................................................................................. 30

4.8 Switching DC on ................................................................................................. 31

5 Initial commissioning ............................................................... 31

5.1 Setting the display language ............................................................................... 31

5.2 Setting the date and time .................................................................................... 32

5.3 Setting the country .............................................................................................. 32

5.4 Setting the reactive power .................................................................................. 33

5.4.1 Setting the mode................................................................................................. 33

5.4.2 Changing parameters of the nodes..................................................................... 34

5.4.3 Displaying the reactive power characteristic curve ............................................. 34

5.5 Finishing the initial commissioning...................................................................... 34

6 Dismounting the inverter ......................................................... 35

6.1 Switching AC and DC off .................................................................................... 35

6.2 Disconnecting DC connection from inverter ........................................................ 35

6.3 Disconnecting AC plug from inverter .................................................................. 35

6.4 Opening the AC plug .......................................................................................... 36

6.5 Removing inverter from mounting plate .............................................................. 36

7 Operation .................................................................................. 37

7.1 Menu structure .................................................................................................... 37

7.2 Navigating the menu structure ............................................................................ 38

7.3 Status displays.................................................................................................... 38

7.3.1 Displaying output power ..................................................................................... 38

7.4 Main menu .......................................................................................................... 39

7.4.1 Displaying yields ................................................................................................. 39

7.4.2 Generator characteristic curve ............................................................................ 39

7.4.3 Event log ............................................................................................................. 39

7.4.4 Information .......................................................................................................... 40

7.4.5 Self-test (only Italy) ............................................................................................. 41

7.4.6 Settings ............................................................................................................... 42

7.4.7 Service ................................................................................................................ 45

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8 Web portal ................................................................................ 48

9 Fault elimination ....................................................................... 49

9.1 Event message type ........................................................................................... 49

9.2 Alerting behaviour ............................................................................................... 50

9.3 Operation ............................................................................................................ 50

9.4 Event messages ................................................................................................. 50

10 Maintenance and care .............................................................. 56

10.1 Maintenance ....................................................................................................... 56

10.2 Care .................................................................................................................... 56

10.2.1 Removing dust .................................................................................................... 56

10.2.2 Cleaning ............................................................................................................. 56

11 Disposal .................................................................................... 56

12 Technical data .......................................................................... 57

12.1 StecaGrid 1511, 2011, 2511, 3011 and 3611 ..................................................... 57

12.2 StecaGrid 3011_2, 3611_2 and 4611_2 ............................................................. 60

13 Table of countries .................................................................... 62

14 Liability, warranty ..................................................................... 62

15 Contact ...................................................................................... 63

16 Annex ........................................................................................ 63

16.1 Drilling pattern for wall mounting......................................................................... 63

763.134 Z02 1913 coolcept_fleX 5

1 General information

These instructions contain information for the safe use of the inverter and all the information that a specialist needs for setting up, and the operator needs for operating the inverter. When installing other components (e.g. PV generator, wiring), follow the instructions of the respective manufacturer.

The coolcept fleX inverters are available in various models for different power classes. The StecaGrid #### inverters are suitable for the connection to one PV generator. The StecaGrid ####_2 inverters are suitable for the connection to two PV generators.

1.1 Types

The coolcept fleX inverters are available in the following models:

• StecaGrid 1511

• StecaGrid 2011

• StecaGrid 2511

• StecaGrid 3011

• StecaGrid 3611

• StecaGrid 3011_2

• StecaGrid 3611_2

• StecaGrid 4611_2

1.2 Accessories

Ask for possible accessories, options, suitable PV generators, and installation material at the installer's or at Steca.

1.3 Documents

Data sheets, drawings, country tables, and certificates are available in the download area of the STECA homepage.

1.4 Monitoring portal

Steca's monitoring portal sunCloud offers online monitoring of the PV generator at no charge: https://steca.powerdoo.com

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1.5 Scope of delivery

1 Inverter

4 DC plug (one pair*)

1 Type plate

Only for Australia: cover the "Protection Class II" symbol (2) on the type

2 Mounting plate 3 AC plug

* coolcept fleX ####_2: two pairs

1.6 Labelling

5 Sealing cap (3 units) 6 Quick guide

2 Safety marks

1.7 Type plate

1 Manufacturer address 2 "Protection Class II" symbol 3 Technical data of the AC output 4 Standard for grid monitoring 5 Country-specific characteristic 6 Barcode (for internal purposes) 7 Device topology 8 Degree of protection 9 Technical data of the DC input 10 Item number and product name

763.134 Z02 1913 coolcept_fleX 7

plate.

Abbreviation

Description

1.8 EU Declaration of Conformity

The products described in this document comply with the applicable European directives. The certificate is available in the download area of our homepage.

1.9 Abbreviations

AC Alternating Current

DC Direct Current

DHCP

Dynamic Host Configuration Protocol (automatic connection of the device to an existing network)

DNS Domain Name System (name of the IP address)

LAN Local Area Network

MAC Media Access Control (device address)

MPP Maximum Power Point

MPP tracker Regulates the power of the connected module strings to the MPP

MSD

Mains monitoring with allocated Switching Devices (internal grid monitoring of the inverter)

Photovoltaics (technology for the conversion of solar energy into electrical energy)

RTU Remote Terminal Unit

SELV Safety Extra Low Voltage

TCP/IP Transmission Control Protocol/Internet Protocol

URL Uniform Resource Locator (internet address)

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2 Safety

The inverter does not cause any inrush current.

NOTE

Any repair work may only be carried out by the manufacturer's customer service department.

2.1 General safety instructions

• This document must be kept to hand at the site of use of the inverter. In case of a change of ownership pass on the document with the inverter.

• This document must have been read and understood in full before installing and using the inverter.

• Incorrectly connected components may cause damage to the inverter.

• If one of the following components is damaged, immediately take the inverter out of

operation and disconnect it from the grid and the PV generators:

- Inverter (not functioning, visible damage, smoke, penetration of liquid etc.)

- Cables

- PV generators

• Do not switch on the system again until it has been repaired and checked by a suitably qualified and authorised technical specialist.

• Dangerous voltages may be present for up to 10 minutes after disconnecting the inverter from the voltage sources.

• Disconnect inverter from both voltage sources (power grid and PV generator) prior to any work on the inverter.

• Always carry out the measures described in this document in the specified sequence.

• Do not change nor remove any factory-applied labels on the inverter.

• Do not open the inverter. Danger to life! Opening the inverter will also void any warranty.

• Do not cover the inverter.

• Keep children away from the inverter.

• Follow the instructions of manufacturers of the connected components.

• Follow the general and national safety and accident prevention regulations.

763.134 Z02 1913 coolcept_fleX 9

2.2 Designated use

The coolcept fleX inverters are intended for single-phase feed-in and are suitable for indoor and outdoor (degree of soiling 3) installation. The inverters are designed for wall mounting.

• Only use the inverter for grid-connected PV generators.

• The inverter is suitable for PV generators whose connections are not grounded.

• All connected solar modules must be classified as Class A according to IEC 61730,

because these inverters do not have galvanic isolation.

• The maximum permissible system voltage of the PV generator must be higher than the AC grid voltage.

• The installation location for the inverter must not be at an altitude higher than 2000 m above MSL.

NOTE

Only for Australia: the inverter may only be operated as a single device. It is not permitted to interconnect several devices.

NOTE

Only for Italy: information about the particularities for the use in Italy have been added to the Italian version of the installation and operating instructions.

2.3 Target group

Unless otherwise noted, the target group for these instructions are specialists and system operators. The following persons are considered specialists:

• Persons that have knowledge of the established terms and skills for setting up and operating PV generators.

• Persons that due to their knowledge and experience are able to evaluate the following tasks and recognise possible hazards:

- Mounting electrical equipment

- Assembling and connecting data cables

- Assembling and connecting power supply cables

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2.4 Labels and symbols

2.4.1 Safety marks

The following safety marks are used on the inverter and in these instructions:

Warning sign Nature of the danger

Warning of hazardous voltage

Warning of hazardous area

Follow the instructions

2.4.2 Keywords

The following keywords are used in these instructions:

Keywo rd Meaning

DANGER

Indicates a hazardous situation which, if not avoided, leads to death or serious injuries.

WARNING

Indicates a potentially hazardous situation which, if not avoided, may lead to death or serious injuries.

NOTE

Indicates a potentially hazardous situation which, if not avoided, may lead to damage to property and/or the environment.

763.134 Z02 1913 coolcept_fleX 11

2.5 Safety symbols on the device

1 Disposal information (separate collection of electrical and

electronic equipment)

2 Request to disconnect the power sources prior to any

intervention

3 Information on presence of voltage after switching off the

inverter 4 Serial number (barcode and plain text) 5 Warning of voltage (two voltage sources) 6 Warning of hot surface 7 Follow the instructions

3 Structure and functioning

The coolcept fleX inverter is connected between PV generators and consumers. Via the DC input and the MPP tracker, PV generators feed in DC, which the inverter converts into AC. Consumers connected to the AC connection are supplied AC by the inverter.

3.1 Structure of the inverter

1 Case 2 Display (monochrome, 128 x 64 pixels) 3 Operating buttons: ESC, , , SET (from left to right) 4 RJ45 sockets (LAN, COM1, COM2) 5 AC connection 6 DC connection (DC input, MPP tracker) 7 DC connection (StecaGrid ####_2: 2 x DC-input,

2 x MPP tracker) 8 DC disconnector (interrupts the plus and minus inputs

simultaneously) 9 Type plate, serial number, warning notices

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3.2 Connections

1 TCP/IP connection (LAN)

4 AC connection

5 DC connection

Button

Acti on

Function

2 RS485 connection (COM1) 3 Modbus RTU connection (COM2)

6 DC connection (StecaGrid ####_2) 7 DC disconnector

3.3 Operating buttons

1 SET 2  3  4 ESC

3.3.1 Functions of the operating buttons

Normal operation Commissioning

ESC Press briefly

Press longer (≥ 1 second)



Press briefly

- Jumps 1 menu level up

- Discards changes

Jumps to the start image

- Moves the selection bar or the display content upwards

- Moves the selection bar 1 position to the left when setting numeric values

- Increases the setting value by 1 step

Jumps 1 step back

Jumps to the start of the guided operation

Press longer (≥ 1 second)

Browses in menu structure -

Triggers a repetition of the command. The repetition rate increases when pressing for a longer period

763.134 Z02 1913 coolcept_fleX 13

Button

Acti on

Function

Normal operation

Commissioning

At very low temperatures, the display may respond more slowly than usual.



Press briefly

- Moves the selection bar or the display content downwards

- Moves the selection bar 1 position to the right when setting numeric values

- Decreases the setting values by 1 step

Browses in menu structure -

Press longer (≥ 1 second)

SET Press briefly

Triggers a repetition of the command. The repetition rate increases when pressing for a longer period

- Jumps down by 1 menu

level

- Jumps to the diagram view in certain menus

- A selected value starts flashing and can be changed

- Accepts any entered changes

- Changes the state of a control element (check box / radio button)

Press longer (≥ 1 second)

Answers a query dialogue with Yes

Navigates 1 step forward

3.4 Display

The display shows the menus of the inverter (for an overview of the menus refer to section

7.1).

As a general rule, the menu name is located in the top left corner, and the corresponding values or selection lines underneath.

14 763.134 Z02 1913 coolcept_fleX

The backlight of the display is switched on by pressing any button. The operating states of the inverter are shown as follows:

Display Meaning

Backlight flashing red with event message

The inverter is processing large data volumes.

It is not possible to enter user data

Fault

3.5 Cooling

The inverter may heat up during operation. This is a normal operating characteristic.

When the internal temperature rises above a certain value, an internal temperature controller regulates the power consumption from the PV generator. The operating temperature decreases when power consumption is lower.

A fan disperses the waste heat inside the closed case evenly onto the case surface. Cooling fins allow the heat to dissipate to the surrounding.

3.6 Grid monitoring

The grid monitoring in the device permanently monitors the grid parameters of the public grid. If the grid monitoring detects a deviation of the grid parameters from the statutory requirements, the device switches off automatically. When the public grid meets the statutory requirements again, the device switches on again automatically.

3.7 Data

3.7.1 Data communication

The device has the following communication interfaces:

• "LAN" connection (Ethernet for TCP/IP network) for the communication with a central data server

• "COM2" connection (Modbus RTU) for the communication with e.g. an external energy meter

• "COM1" connection (RS485 bus) for the communication with external devices, e.g. with a data logger (in the case of StecaGrid ####_2: two connections)

For data analysis purposes, the inverter can provide a wide range of data via the RS485 and LAN interfaces (e.g. data logger). The RS485 bus also allows the connection to other inverters.

763.134 Z02 1913 coolcept_fleX 15

3.7.2 Data display

The following data are shown on the display:

• voltage and current generated by the PV generator

• power and current fed into the public grid

• current voltage and frequency of the public grid

• generated energy yields on a daily, monthly and annual basis

• current error states and notes

• Information on the version of the device

3.7.3 Data storage

In the internal memory (EEPROM), event messages and energy yields are stored with the date. The energy yields are stored for the specified period.

Energy yi eld Storage resolution/period

10-minutes values 31 days

Daily values 13 months

Monthly values 30 years

Annual values 30 years

Total yield Permanent

3.8 Network (TCP/IP)

Via the "LAN" connection, the device can send yield data and event messages to the server of a web portal. The "Stecagrid Portal" web portal (https://www.steca.com/index.php?Steca-sunCloud-Registration resentation of the yield data.

In "Settings" > "Network", the operator can enter the network parameters in further submenu masks (refer to section 7.4.6).

16 763.134 Z02 1913 coolcept_fleX

) allows the graphical rep-

Set an external data logger prior to the connection. Follow the instructions of

3.9 "COM1" and "COM2" connections

The inverter can communicate with other device via the "COM1" and "COM2" connections. Requirements for the communication:

• Both ends of the data connection are terminated.

• RJ45 standard cables or alternative data connecting cables are used as bus cables.

3.9.1 Connecting further master devices

the manufacturers.

Optionally, one of the following master devices can be connected to the "COM1" connection. These devices support the transfer protocol of the inverter.

• StecaGrid SEM, Smart Energy Manager:

- Interface to a ripple control receiver for a feed-in management that is in accordance

with the Renewable Energy Sources Act or EEG (German: Erneuerbare-EnergienGesetz)

• PC or notebook (with related software):

- Read inverter information out with "StecaGrid User Software"

(https://www.steca.com/index.php?StecaGrid-User-en).

- Connection to the inverter possible via optional RS485 adapter => USB; the adapter

is available at Steca, with part number 746.610 (IP21) or 737.707 (IP65).

- Transmission of firmware updates (only specialists).

• External data logger for professional system monitoring (recommended by Steca):

- WEB’log (Meteocontrol)

- Solar-Log (Solare Datensysteme)

- Energy-Manager (Kiwigrid GmbH)

763.134 Z02 1913 coolcept_fleX 17

The following inverters have compatible data interfaces and can be con-

1 External data logger

3 Inverter

4 Last inverter, terminated

3.9.2 Connecting further inverters

Inverters connected via the "COM2" connection operate as slave devices. RJ45 standard cables (patch cables) for outdoor installation are suitable connecting cables.

2 First inverter

nected as slaves to the "COM1" and "COM2" connections:

- StecaGrid 2020

- StecaGrid 1500, 1800, 2000, 2300, 2500, 3010

- StecaGrid 3000, 3600, 4200 and StecaGrid 1500, 1800x

- StecaGrid 2000x, 2300x, 2500x, 3010x, 3000x, 3600x, 4200x

- StecaGrid 1511, 2011, 2511, 3011, 3611, 3011_2, 3611_2, 4611_2 Follow the instructions on addressing, termination, and approved data cables

in the operating instructions of these devices.

5 RJ45 standard cable (patch cable)

18 763.134 Z02 1913 coolcept_fleX

Device

Inverter

Solar-Log

WEB’log1)

Kiwigrid

Signal

Connection

COM1/COM2

Terminal block

RJ12

Terminal



3.9.3 Alternative RS485 data connecting cable

NOTE

Voltage may cause property damage.

►

Only have specialists manufacture the alternative data connecting cable.

Use a CAT 5 cable for the alternative data connecting cable in the case of long data connecting distances.

The total length of the data connecting cable shall exceed 1000 m.

If the alternative data connecting cable is connected to the RJ45 socket of the first inverter and to the connection of the external data logger, the connections in the plug must be assigned in accordance with the following table.

Plug assignment of alternative RS485 data connecting cable

block

1 1 2 A Data A

2 4 4 B Data B

3 - - - -

4 - - - -

Contact

5 - - - -

6 - - - -

7 - - - -

8 3 6 GND Ground

NOTE

Contact 1 of the RJ12 socket supplies 24 V DC!

The RS485 input of the inverter may be damaged.

►

Never connect the alternative data connecting cable to contact 1.

763.134 Z02 1913 coolcept_fleX 19

3.9.4 RS485 termination

Terminate the data connection at its beginning and at its end to ensure faultless data transmission:

• Beginning of the data connection: terminate external data logger in accordance with the manufacturer's instructions.

• End of the data connection: insert termination plug into the vacant RS485 interface of the last inverter.

3.9.5 RS485 addressing

All inverters are set to address "1" at the factory. For the master-slave communication, each inverter requires its own address. The address is changed in the menu under "Settings" > "RS485 address".

• If possible, assign the addresses starting with 1 at the first inverter and ascending to the last, as the number of possible addresses in the inverters is limited.

• The sequence of addresses should mirror the order of the mounted devices, to facilitate the identification of the devices.

3.9.6 Connecting an energy meter (Modbus RTU)

The inverter is able to communicate with energy meters via the "COM2" connection. To do this, the energy meter must meet the following requirements:

• The energy meter has been preprogrammed in the inverter.

• The energy meter measures the draw from the grid in positive direction (refer to instruc-

tions of the energy meter).

Modbus RTU data connecting cable

NOTE

Voltage may cause property damage.

►

Only have specialists manufacture the alternative data connecting cable.

Use a RJ45 standard cable or a CAT5 patch cable as data connecting cable.

20 763.134 Z02 1913 coolcept_fleX

Plug connection of the Modbus RTU data connecting cable

Connection

COM2

Signal

This configuration meets both the requirements in accordance with VDE-AR-

To allow a rapid shutdown of the generating plant by the grid operator

Device Inverter

RJ45

1 -

2 -

3 -

Contact

4 -

5 -

6 Data A

7 Data B

8 Ground

3.9.7 Remote shutdown by the grid operator and rapid shutdown

"Teledistacco" (Italy)

Assignment of contacts for rapid shutdown

For external fas shutdown, lines 3 and 8 of COM1 or COM2 are connected (e.g. with an external relay). The following applies:

N-4105 and the requirements for a rapid shutdown ("Teledistacco") for Italy in accordance with CEI 0-21.

(RAPID SHUTDOWN) via an external device used for control purposes, the connections "COM1" or "COM2" must be connected as described below.

Assignment of contacts corresponds to the conductor number of the RJ45 plug.

• Relay closes: Inverters connected to the bus disconnect from the grid.

• Relay opens: Inverters connected to the bus connect to the grid in normal operation.

763.134 Z02 1913 coolcept_fleX 21

4 Installing the inverter

4.1 Safety instructions for installation

DANGER

Voltage Under solar radiation, the PV generators and cables may be energised.

There is the risk of death due electrocution and electric discharge.

►

Disconnect the DC and AC connections from the power source prior to any work on the inverter:

– Switch off all AC line circuit breakers and secure them against being

switched on again.

– Set the DC disconnector on the inverter to position '0' and secure it

against being switched on again.

– Disconnect the plugs of the DC cables (follow the instructions of the

manufacturer).

– Disconnect AC plug from the inverter: press locking hook on the

AC plug slightly an remove AC plug.

►

Only have specialists carry out any installation work.

►

Only connect the cables to the inverter when it is requested by the instructions.

►

Only connect SELV circuits to the RJ45 socket.

NOTE

Improper installation my cause performance reduction or damages on the inverter.

►

Ensure that the installation site meets the following requirements:

– The mounting surface and immediate surrounding must be: perma-

nently fixed, vertical, level, of low flammability, and not subject to constant vibration.

– The ambient conditions are within the permissible range (refer to chap-

ter 12).

– Open spaces are provided for around the device (above and under-

neath ≥ 200 mm, to the sides and in front ≥ 60 mm).

►

Do not install the device in stables where animals are kept.

►

Avoid exposure to direct sunlight of the device.

►

Ensure that the display can be easily read on the installed device.

22 763.134 Z02 1913 coolcept_fleX

Data transmitted via a public network are not protected from being accessed

by third parties.

Data transmission via a public network may cause additional costs.

►

Obtain information on costs possibly involved prior to the use of a public network.

►

Use a public network at your own risk.

A type A residual current breaker (RCCB) is sufficient.

• Lay the cables such that the connection cannot come loose accidentally.

• Ensure that the fire safety measures of the building are not impaired when routing

cables for the device.

• Make sure that no inflammable gases are present.

• Observe all applicable installation regulations and standards, national laws and connec-

tion values specified by the regional power supply company.

• Observe the connection ratings specified on the type plate.

• Do not connect the DC cables to ground potential.

The DC inputs and the AC output are nor galvanically isolated from each other.

4.2 Mounting the inverter

4.2.1 Attaching the mounting plate

1. Place mounting plate on the mounting surface. The

locking plate (1) must point upwards. The retaining tabs point to the front.

2. Fasten the mounting plate to the mounting surface with

4 screws. For the drilling pattern refer to chapter 16.

The mounting materials are not included in the scope of delivery.

763.134 Z02 1913 coolcept_fleX 23

Inverter

Cable cross section

Power loss

Circuit breaker

4.2.2 Fixing the inverter to the mounting

plate

1. Place inverter centrally on the mounting plate. In

doing so, hold the inverter by the edge (1).

2. Slightly press on the inverter and slide it downwards.

The locating pins (4) on the inverter must hook into the retaining tabs on the mounting plate.

3. Introduce detent (2) into the opening of the locking

plate (3). When the detent audibly click into place, the device can no longer be lifted.

4.3 Preparing AC connection

DANGER

Voltage There is a risk of death by electrocution.

►

Follow the safety instructions and warning notices in chapter 5.

4.3.1 Selecting AC cable

Install the circuit breaker prior to any work on the AC connection.

Depending on the power of the inverter, you may have to use different circuit breakers and connecting cables.

AC cable

(with 10 m cable length)

StecaGrid 1511 1.5 mm² 10 W

4.0 mm² 4W

StecaGrid 2011 1.5 mm² 18 W

4.0 mm² 6 W

StecaGrid 2511 2.5 mm² 16 W

4.0 mm² 11 W

24 763.134 Z02 1913 coolcept_fleX

B16 2.5 mm² 6 W

B16 2.5 mm² 11 W

B16

Inverter

Cable cross section

Power loss

Circuit breaker

1 AC plug housing

3 L connection (outer conductor)

AC cable

(with 10 m cable length)

StecaGrid 3011 and StecaGrid 3011_2

StecaGrid 3611 and StecaGrid 3611_2

2.5 mm² 25 W B16 or B25

4.0 mm² 15 W

2.5 mm² 35 W

B25

4.0 mm² 23 W

StecaGrid 4611_2 2.5 mm² 56 W

B25

4.0 mm² 35 W

4.3.2 Residual current circuit breaker

If the local installation specifications prescribe the installation of an external residual current circuit breaker, install a residual current circuit breaker. In accordance with IEC 62109-1, a type A residual current circuit breaker is adequate.

4.3.3 Assembling the AC plug

NOTE

If the instructions of the plug manufacturer are not followed when connecting the AC plug, the cable and the device may be damaged.

►

Follow the instructions of the plug manufacturer.

Assemble the AC plug (refer to section "Assembly instruction for AC plug") and connect it.

220 V to 240 V grid voltage

Connect conductors N, L, and PE on the AC plug in 1-phase grid with 220 V to 240 V grid voltage.

2 PE connection

4 N connection (outer conductor)

763.134 Z02 1913 coolcept_fleX 25

1 AC plug housing

3 L1 connection (outer conductor)

100 V to 127 V grid voltage

DANGER

Voltage There is a risk of death by electrocution when connecting the phases L1, L2,

or L3 to PE or N.

►

Follow the safety instructions and warning notices in chapter 5.

The structure of 100 V to 127 V grid voltages differs from that of 220 V to 240 V grid voltages as it is not a 1-phase but a 2 or 3-phase grid.

2 PE connection

4 L2 connection (outer conductor)

Connecting AC plug to 2-phased grid

Connect the inverter between the L1 and L2 outer conductors.

1. Connect the N and L connection of the AC plug (1) between the L1 (3) and L2 (4) outer conductors of the grid cable.

2. Connect PE cable to PE connection on the AC plug.

Connecting AC plug to 3-phased grid (not depicted)

In the 3-phase grid, there are 3 outer conductors in the cable:

1. Connect N and L connections of the AC plug between any 2 outer conductors (between L1 and L2, or L1 and L3, or L2 and L3).

2. Connect PE cable to PE connection on the AC plug.

26 763.134 Z02 1913 coolcept_fleX

Voltage distribution in the 2 and 3-phase grid

The voltage in 2 and 3-phase grids is the same in every outer conductor: 100 V to 127 V.

Assembly instruction for AC plug

1. Guide cable through the plug housing. Slide plug housing (1) onto the cable.

2. Introduce wire ends (2) into the plug. Ensure that the bending radius of the cables is large enough (at least 4 times the cable diameter).

3. Using a screwdriver (Pozidriv PZ1) (3), secure wire ends with clamping screws. Tightening torque: 0.8 to 1 Nm. Ensure that the clamping connection holds.

4. Slide plug housing onto the plug and tighten until a click sound is heard.

763.134 Z02 1913 coolcept_fleX 27

4.4 Preparing DC connection

DANGER

Voltage There is a risk of death by electrocution.

►

Follow the safety instructions and warning notices in chapter 5.

►

Use the SUNCLIX plug connectors (DC plugs) included in the scope of delivery to ensure the specified degree of protection.

NOTE

If the DC plugs are not connected correctly to the DC cable, there is a risk of short circuit. The inverter and modules may be damaged.

►

Connect counterparts to the DC connections to the DC cable ensuring correct polarity.

4.4.1 Fitting cable to DC plug

NOTE

Soiled, displaced, or damaged seals impair the strain relief and the impermeability.

►

Do not soil, shift, nor damage the seals during DC plug assembly.

1. Strip 15 mm of cable end of cable (1).

2. Release spring (2) upwards.

3. Introduce stripped cable end into the DC plug until the cable end becomes visible underneath the spring (2).

4. Press spring (2) against the stripped cable end until it engages audibly. Ensure that the cable end is securely fastened.

5. Slide union nut (4) onto inset (3) of the DC plug.

6. Hold inset with a size 16 wrench and tighten the union nut (4) with a wrench, applying a tightening torque of 2 Nm.

4.4.2 Preparing data connecting cable

You can use a standard cable (patch cable, CAT4) suitable for outdoor operation or an alternative RS485 data connecting cable for the data connection. Observe section 3.9.4 when manufacturing an alternative data connecting cable.

28 763.134 Z02 1913 coolcept_fleX

4.5 Connecting inverter and switching AC on

DC and AC cables may interfere with data transmission.

DANGER

Voltage There is a risk of death by electrocution.

►

Follow the safety instructions and warning notices in chapter 5.

►

Keep a distance of 200 mm between the data connecting cables (RS485/Ethernet) and the DC/AC cables.

NOTE

If sealing caps are missing, moisture may get into the inverter.

►

Seal vacant RJ45 sockets with sealing caps.

1. If required, establish the data connection:

- Connect inverters (mater device and further connected inverters) with data connect-

ing cable(s).

- Switch on termination on the last inverter (slide switch).

2. Seal vacant RJ45 sockets with sealing caps.

3. Press DC plug firmly into the DC connection in the inverter until it engages audibly.

4. Insert AC plug into the AC connection in the inverter until it engages audibly.

5. Switch on the AC circuit breaker.

The display shows the start page of initial commissioning.

4.6 Performing initial commissioning

Any further actions required for the installation of the inverter cannot be carried out before the initial commissioning has been performed. The initial commissioning is comprehensibly described in chapter 5.

763.134 Z02 1913 coolcept_fleX 29

4.7 Setting the feed-in management

Depending on the country, PV generators must be able to reduce the fed-in active power. The following products are suitable for implementing this legal requirement:

• StecaGrid SEM

• WEB’log from Meteocontrol

• Solar-Log from Solare Datensysteme

• Energy-Manager from Kiwigrid

An energy meter can be connected to the inverter via the Modbus RTU interface (refer to section 3.9.7).

The feed-in management is set in the "Energy management" submenu (refer to section 7.1).

• "Mode": switching the energy meter on or off

• "Dyn. feed in control": limiting the value of feed-in

• "Configuration": selecting an energy meter

4.7.1 Switching the energy meter on or off

• "Off": switching the energy meter off

• "Energymeter": switching the energy meter on

4.7.2 Limiting the dynamic feed-in value

1. Limit the power fed into the grid. You can enter values starting from 0 W and incrementing by 10 W.

4.7.3 Selecting an energy meter

The inverter can only communicate with the energy meters that have been preprogrammed.

1. Call the "Metertype" menu by pressing "SET".

2. Using " ", select a meter type from the list of preprogrammed energy meters.

3. Exit the menu with "ESC".

30 763.134 Z02 1913 coolcept_fleX

Not until all the checkboxes in the checklist have been marked and the

4.8 Switching DC on

Switching on the DC disconnector on the inverter finishes the installation of the inverter. After approx. 2 minutes, the display can show the fed-in power (provided that there is solar radiation).

1. Turn DC disconnector on the inverter to position 'I'.

5 Initial commissioning

After installing and switching on the inverter, the dialogue for initial commissioning starts automatically. During initial commissioning, the user will navigate through the menu structure via the display.

If the initial commissioning is not completed, the dialogue for initial commissioning will start again after switching on the inverter.

During initial commissioning, you will set the display language, the date, the time, the country, and the reactive power characteristic curve (only when prescribed for the selected country).

A checklist with all the settings required for the initial commissioning is shown on the display.

The settings in the menus of the initial commissioning are performed via the operating buttons (for a comprehensive description of the function of the operating buttons, refer to section 3.3).

"Finish" menu is closed, will the initial commissioning be concluded.

5.1 Setting the display language

The default display language is English.

1. Select and confirm the desired language.

763.134 Z02 1913 coolcept_fleX 31

5.2 Setting the date and time

1. Select and confirm the desired date format.

2. Set and confirm date/time. The inverter will automatically correct any invalid input.

5.3 Setting the country

With this menu item, you will set the country of use. Depending on the selection, the inverter will load the grid parameters specified for the country (refer to "Table of countries" in the download area https://www.steca.com/index.php?coolcept-fleX-1-MPPT-en

https://www.steca.com/index.php?coolcept-fleX-2-MPPT-en).

The country can only be set once. In case of an incorrect input or change of country:

1. Please, contact Steca (ask for password).

2. In the "Del. country settin" menu, delete the set country (password-protected setting).

3. Perform the initial commissioning again.

If the respective country is not present in the country selection, select a country with stricter specifications.

The selection of a country has no impact on the display language.

1. Select and confirm the country.

2. If a correction is required, return to the country selection mask by pressing "ESC".

3. If the input is correct, confirm the set country (press "SET" longer).

and

32 763.134 Z02 1913 coolcept_fleX

5.4 Setting the reactive power

The "Reactive power" menu only appears when in the selected country a

The data for the reactive power control are not indicated in the consumer

reactive power setting is prescribed.

counting arrow system but in the generator counting arrow system.

In the "Reactive power" menu, you can set the reactive power mode and display the reactive power characteristic curve.

5.4.1 Setting the mode

1. Select and confirm the "Mode" menu.

2. Select and confirm the desired mode. The "Reactive power" menu is displayed again.

If another mode than "cosPhi = 1" has been selected, the display in the "Reactive power" menu will additionally show the "Load Defaults" and "Number of nodes" menu items. In this case, additionally perform the following actions:

3. Select and confirm the "Load Defaults" menu.

4. Select the desired defaults and confirm with "SET". The "Reactive power" menu is displayed again.

5. Select and confirm "Number of nodes".

6. Enter and confirm the number of nodes. The characteristic curve is freely programmable through the nodes.

7. With "ESC" continue to the "Nodes" menu (for > 2 nodes) or go back to the "Reactive power" menu (for ≤ 2 nodes).

763.134 Z02 1913 coolcept_fleX 33

"P (%)" cannot be changed for the first and the last node (000 %, 100 %).

5.4.2 Changing parameters of the nodes

The "Nodes" menu mask only appears when at least 3 nodes have been entered.

1. Enter and confirm the desired value for "P" and "cos ψ".

2. Return to the "Reactive power" menu with "ESC".

5.4.3 Displaying the reactive power characteristic curve

The characteristic curve previously entered is displayed.

1. Return to the checklist with "ESC".

5.5 Finishing the initial commissioning

1. Select "Finish" from the checklist and confirm.

If the checklist has not been processed completely, the message "Settings are incomplete" is displayed. In this case:

1. Press "SET". The checklist is displayed again.

2. Process the open items and finish the processing.

When all settings have been processed, a dialogue stating "Are all settings correct?" is displayed. In this case:

1. Check the settings.

2. If any settings have to be corrected, select the corresponding menu in the checklist and correct the settings.

3. If all the settings are correct: press "SET" longer. The inverter is restarted and synchronises itself with the grid.

After finishing the initial commissioning, you can set the feed-in management and switch DC on (refer to section 4.7).

34 763.134 Z02 1913 coolcept_fleX

6 Dismounting the inverter

The safety instruction from chapter 5 apply.

6.1 Switching AC and DC off

1. Turn DC disconnector on the inverter to position "0".

2. Switch the AC circuit breaker off.

6.2 Disconnecting DC connection from

inverter

DANGER

Voltage can be present at the DC-connection for up to 10 minutes after switching off the DC circuit breaker.

There is a risk of death by electrocution.

►

Wait 10 minutes after switching off the DC disconnector.

DANGER

The PV generator carries voltage when there is solar radiation. There is a risk of death by electrocution.

►

Only have specialists carry out any work on the DC connection.

1. Disconnect plug of the DC cables as described in the instructions of the DC plug manufacturer (refer to annex).

6.3 Disconnecting AC plug from inverter

1. Using a suitable tool, press locking hook on the AC plug slightly in and remove the plug.

2. Ensure that none of the AC plug poles carries voltage with the help of a suitable voltage tester (do no use a phase testing probe).

763.134 Z02 1913 coolcept_fleX 35

6.4 Opening the AC plug

1. Open the rear cable gland.

2. Simultaneously press in the locking hooks on the left and on the right of the plug housing with a suitable tool.

3. Remove the upper part of the housing form the contacting part.

6.5 Removing inverter from mounting

plate

1. Press locking plate (3) towards the wall and hold it there.

2. Push inverter upwards until the detent (2) can no longer snap in.

3. Release the locking plate.

4. Hold inverter by the edge (1) with both hands and lift it off upwards. The locating pins (4) must separate from the retaining tabs of the mounting plate.

5. Remove inverter from mounting plate.

6. Unscrew the fastening screws of the mounting plate.

7. Remove mounting plate.

36 763.134 Z02 1913 coolcept_fleX

7 Operation

7.1 Menu structure

The menu structure of the inverter is divided into Status display, the Main menu und Submenus, which themselves may contain further submenus.

When switching on the inverter, the "Output power" status display is always shown as start image. From this status display you can go to all other menus.

763.134 Z02 1913 coolcept_fleX 37

Due to further technical development, changes of the menu structure are

For reasons of clarity, only the "" and "SET" operating buttons are depicted in the menu structure. The individual functions of the operating buttons are described in section 3.4.

possible after delivery of this document. The current version of the menu structure is available in the download area of our homepage.

7.2 Navigating the menu structure

• To go from one "Output power" status display to the other status displays: scroll through

the status displays with the "" operating buttons.

• To go from the "Output power" status display to the main menu: press "SET".

• To go to the other menu items within the main menu: scroll through the menu with the

"" operating buttons.

• To go from a menu item to a submenu: press "SET".

• To go to other menu items within a submenu: scroll through the submenu with the ""

operating buttons.

• To return from any menu to the "Output power" status display: press and hold "ESC" for

1 second.

7.3 Status displays

The status displays show various measured values. "Output power" and "Grid voltage" have been preset in the factory and are always displayed. Further status displays that shall be shown can be defined in "Settings" > "Meas. values".

7.3.1 Displaying output power

1 Menu name 2 Measurement with units 3 Time 4 IP address

In the event of too little solar radiation, the display does not show any measured value (e.g. at night).

All other menus of the status display are similar in structure and are therefore not mentioned separately.

38 763.134 Z02 1913 coolcept_fleX

7.4 Main menu

In the menu items of the main menu and the submenus, you can call various data and perform various settings. The most important menu items are described in the following section. The respective figures show examples.

7.4.1 Displaying yields

Structure of the "Yield" menus:

• On the left: definition of the period (daily/monthly/an-

nual/total)

• On the right: individual yields per period

Via "SET" in the subsequent menu, the period of time displayed can be changed.

The periods contain the following number of individual yields:

- Daily yield: the last 31 days

- Monthly yield: the last 13 months

- Annual yield: the last 30 years

If the inverter had not been installed in one of the listed periods, the yield value "0" is displayed.

Yield (diagram representation)

By pressing "SET" in the menus with the daily, monthly and annual yields, you can go to the respective diagram view.

7.4.2 Generator characteristic curve

The "Gener. ch. Curve" menu displays the PV generator characteristic curve graphically.

1 Y axis: power in kW 2 Vertex = MPP 3 X axis: input voltage in V

7.4.3 Event log

In the "Event log" menu, it is possible to call event messages sorted chronologically. By pressing "SET", the list of event messages can be displayed. The event messages possible are described in the section 9.4.

763.134 Z02 1913 coolcept_fleX 39

7.4.4 Information

The "Information" menu item contains the following submenu items:

• "Contact info": data for establishing contact with Steca

• "System info" with:

- Product name

- Serial number of the inverter

- Software and hardware versions of the inverter

- Inverter address

- Version of the inverter's operating instructions

• "Country setting": set country and country-specific grid parameters; set during initial

commissioning

• "React.pwr.char. curve": diagram of the reactive power characteristic curve; only in cer-

tain countries

• "Network": network parameters, in part configurable in "Settings" > "Network"

- Hostname

- DHCP status: on/off

- Link status: condition of the network connection

- IP address of the inverter

- Subnet mask

- Gateway: IP address of the network gateway

- DNS address: IP address of the DNS server

- MAC: hardware address of the inverter

• "Results of last self-test" (only when Italy is set in the country setting)

• "Discovery Service": Yes = inverter is visible in the network for other participants of the

network. Yes = inverter is not visible in the network for other participants of the network.

40 763.134 Z02 1913 coolcept_fleX

7.4.5 Self-test (only Italy)

Message

Cause

Remedy

If the self-test could not be run successfully, the inverter does no longer feed

The results of the self-test stored in the inverter can be shown on the display

During the self-test, the inverter tests its shutdown behaviour with regard to too high / too low grid voltage and frequency (7 test sections, approx. 40 minutes).

You will start the self-test by pressing "SET" longer. While the self-test is running, the measured values are shown on the display.

If the self-test has been successful, you can exit the menu by pressing "SET".

If a measured value lies outside of the required tolerance, the self-test aborts.

The "Self-test failed" message displayed has to be confirmed by pressing "SET". The, the self-test has to be repeated as soon as possible.

If not all the required conditions for performing the self-test have been met, an error message appears on the display:

MSD not ready

An error was detected

Invalid grid conditions

Not enough sunlight

in.

►

Repeat self-test as soon as possible.

in "Information" > "Self-test".

The self-test does not start because the inverter is not operational

The self-test does not start because an internal error is present

Self-test abort due to invalid network conditions, e.g. in the event of an AC voltage that is too low

Self-test does not start or aborts due to the fact that the solar radiation is too low, e.g. in the evening or at night

Repeat the self-test later, when the inverter is feeding in

If this error occurs repeatedly, inform the installer

Repeat the self-test later

Repeat the self-test when there is sufficient solar radiation

763.134 Z02 1913 coolcept_fleX 41

7.4.6 Settings

From the "Settings" main menu you can go to the submenus with configurable parameters by pressing "SET".

Self-explanatory menus are not described in the following section.

Input mode

The "Input mode" menu is only visible in StecaGrid ####_2 devices with two PV inputs. It is possible to select the functioning mode of the connected PV inputs: "Independent" or "Parallel".

"Independent"

Both PV inputs (MPP tracker) operate independently from each other.

This mode is applied when connecting two PV generator fields that are differently oriented to each other, e.g. east/west roof mounting.

"Parallel"

Both PV inputs (MPP tracker) operate synchronously. In this, the MPP tracking is determined by the first PV input.

This mode is applied when mounting two PV generator fields next to each other, e.g. when the input current exceeds the maximum permissible value in accordance with the type plate. The PV cables must be connected via a wye junction.

Energy management

The settings related to the energy management are described in "Feed-in management" (refer to section 4.7). The energy management includes the following submenus:

• "Mode": energy meter can be switched on or off

• "Dyn. feedin control": parameters for feed-in can be set.

• "Configuration": energy meters can be defined more precisely with the "Meter type" and

"Meter position" submenus

Measured values

In the "Meas. values" submenu, you determine which menus the status display shall contain.

The following measured values are available:

• "Output power": output power of the inverter

• "Current day yield": day yield since 00:00

• "PV voltage": voltage supplied by the PV generators

• "PV current": current supplied by the PV generators

• "PV performance": power generated by the PV generators

42 763.134 Z02 1913 coolcept_fleX

• "Grid voltage": voltage at the inverter connection1)

To set up the TCP/IP network connection, an input of parameters is required.

it is not possible to set up the TCP/IP network

• "Grid frequency": frequency of the public grid

• "Internal temp": internal temperature of the inverter

• "Derating": reason for the power reduction

Possible reasons:

- Internal temperature too high

- User default for power limit

- Frequency too high

- Control by grid operator (feed-in management)

- Delayed power increase after start

• "Max. daily power": maximum power of the current day

• "Abs. max. power": highest power fed in2)

• "Day max. yield": max. achieved day yield

• "Operating hours": operating hours on the grid (including hours at night)

• "Total yield ": yield since commissioning

• "CO

saving": CO2 saving since commissioning

Measured value is always displayed (it is not possible to switch it off)

Can be reset to zero via "Settings" > "Reset max. vals.".

RS485 address

The address of the RS485 connection can be entered.

Network

By pressing "SET", you can go to the following submenus: "DHCP", "IP address", "Subnet mask", "Gateway", "DNS", and "Web portal", which itself has submenus.

Without knowing the parameter connection.

►

If necessary, seek the advice of another specialist.

DHCP is activated in the inverter ex factory. Therefore, the IP address is automatically assigned to the network.

763.134 Z02 1913 coolcept_fleX 43

The parameters that are required for network communication (e.g. with a web portal) are configurable.

The following parameters can be opened and edited by pressing "SET":

• "DHCP"

• "IP address": IP address of the inverter

• "Subnet mask": information on the network and address space

• "Gateway": IP address of the network gateway

• "DNS address": IP address of the DNS server

• "Web portal": parameters related to the web portal

with the following submenus:

- "Setup": selection of the web portal

- "Retransmission": renewed transmission of existing data

- "Connection test": test of the internet connection

Alarm

Acoustic signals for event messages can be switched on or off (factory setting = switched off):

• 2 sounds: warnings

• 3 sounds: errors

Backlight

The behaviour of the display lighting can be set:

• "Off": no backlight

• "Automatic": the backlight is switched on for 30 seconds after pressing a button

• "Feed-in mode": backlight depends on feed-in

- "No feed-in": switched on for 30 seconds after pressing a button and, then, switched off

- "Feed-in": switched on for 30 seconds after pressing a button and, then, dimmed

44 763.134 Z02 1913 coolcept_fleX

7.4.7 Service

Legally required parameters can be changed in the service menus. Any

change may have a negative effect on the performance of the inverter and possibly even break a law.

►

Only specialists that can ensure that the changes do not violate any applicable regulations and standards are allowed to perform any changes on the parameters of the service menus.

To go to the service submenus, the "" operating buttons must be pressed simultaneously for 3 seconds.

Some dialogues of the service menus are password-protected. This password can be obtained from Steca's support department (refer to chapter 15).

Setting the reactive power characteristic curve

Setting the reactive power characteristic curve is only required if this is specified for the selected country.

Deleting the country setting

The selected country setting can be deleted. This task is password-protected (contact to Steca is required). The inverter restarts and displays the guided initial commissioning again.

Voltage limits

The voltage limits (peak values of the voltage) can be set by defining the following values:

• "Lower value"

• "Upper value"

763.134 Z02 1913 coolcept_fleX 45

Frequency limits

The frequency limits

can be set by defining the following val-

ues:

• "Lower value"

• "Reactivation value"

• "Start value"

• "Upper value"

Switch-on threshold for power reduction (when frequency is too high)

P(f) activation delay

The function of active power limitation for frequency transient has an activation delay which can be changed.

Voltage limits ø

Voltage limits ø (mean values of the voltage) can be set by defining the following values:

• "Upper value"

• "Lower value"

Power limiter

The output power of the inverter can be limited up to a minimum of 500 W.

When the power is manually limited, the status display shows the "Power reduction" symbol and "Reason: user default".

46 763.134 Z02 1913 coolcept_fleX

Fixed voltage

Using the inverter for fixed voltage operation is not considered an intended use. If, nevertheless, the inverter shall be used for fixed voltage operation, consultation with Steca is required.

NOTE

The PV generator must be suitable for feeding in a fixed voltage.

Fixed input voltages in the inverter may damage unsuitable PV generators or reduce their yield.

►

The parameter for fixed voltage are password-protected. The specialist can only change these parameters after consultation with Steca.

The device can adjust the input voltage to a manually configurable value. Thereby, the automatic setting of the MPP (MPP tracking) is switched off.

The entered parameter value may lie between the maximum and minimum input voltage in 1 V increments.

A possible example for application of fixed voltage operation are hydropower plants.

PowerPeak Scan

With the PowerPeak scan, the energy yield of the inverter can be improved in the case of partial shadowing of PV strings (e.g. by parts of buildings, trees or power lines). The current MPP is intentionally left for a short time to hereby find the better MPP. The scan is only performed approx. every 10 minutes to impair the total energy yield caused by the brief power reduction during the scan process as little as possible.

The PowerPeak scan can be switched off in "Settings" > "Service" > "PowerPeak Scan".

763.134 Z02 1913 coolcept_fleX 47

Automatic start of the transmission of unencrypted data.

Factory setting

Resetting the data to factory settings deletes the following data:

• Yield data

• Event messages

• Date and time

• Country setting

• Display language

• Network settings

The inverter restarts. The initial commissioning must be performed again.

All parameters

This menu item allows the change of further ENS parameters (only service technician).

8 Web portal

After establishing the network connection, the inverter automatically starts data transmission to the server. If automatic transmission is not wanted:

►

Remove network cable.

Or:

►

Deactivate data transmission in "Settings" > "Network".

With the monitoring portal sunCloud, permanently free of charge, online monitoring of PV generators is easy and comfortable. Registration of the operator and the system in the sunCloud portal is possible at: https://steca.powerdoo.com

Operator guidance in the sunCloud portal is easy and allows intuitive navigation. After registering and connecting the TCP/IP interface LAN to a PC, the portal displays data (e.g. yield data and performance of the connected PV generator).

The local network settings for the connection to the server have been set on the inverter. Setting the local network can be done automatically or manually:

• Automatic: if the DHCP prescribes the IP address in the network automatically, no settings are required on the inverter.

• Manual: if the IP address in the network is not assigned automatically, the IP address must be set manually on the inverter in "Settings" > "Network" (refer to section 7.4.4).

The URL of the web portal is saved permanently in the inverter and cannot be changed.

48 763.134 Z02 1913 coolcept_fleX

9 Fault elimination

Event messages indicate faults: the display will be flashing red and a text will describe the fault present.

Typical display of an event message

Event messages contain the following information:

1 Event message type 2 Date/time of the event message 3 Note on the status of the event:

Active = fault is still present Date/time = fault was eliminated at the indicated time

4 Cause of the fault 5 Consecutive number / total number in the list of events 6 Acknowledged / not acknowledged fault

Events are acknowledged by pressing the "ESC" or "" operating buttons.

9.1 Event message type

Information

The inverter has detected an error which does not impair feed-in. There is no need for the user to intervene.

Warning

The inverter has detected an error which may cause reduced yields. It is recommended to eliminate the cause of error.

Error

The inverter has detected a serious error. The inverter does not feed in as long as the error is present. Inform the installer.

763.134 Z02 1913 coolcept_fleX 49

By acknowledging the event message, the staff confirms that they have no-

9.2 Alerting behaviour

ticed the event message. The fault, however, persists. The cause of the fault is not eliminated thus.

New event messages appear immediately on the display. An event message disappears after the operator has acknowledged the event message or eliminated the cause of the fault.

If event messages, whose cause has been eliminated, have not yet been acknowledged, the status display will show an not opened message: .

9.3 Operation

In the main menu, select the "Event log" submenu.

• "SET": a list of the event messages appears.

• "": scroll through the list.

• "NEW": select new event messages by pressing "SET" and acknowledge by pressing

"ESC" or "".

9.4 Event messages

The following table contains examples for event messages and their elimination.

Event message Description Type

Data transfer failed

Grid islanding detected

FE not connected

50 763.134 Z02 1913 coolcept_fleX

A setting has failed, e.g. during initial commissioning, because it has not been transmitted correctly.

- Perform the setting again.

- If this error persists, inform the installer.

The grid does not carry voltage. The inverter must not feed into the grid for safety reasons. The inverter is switched off as long as this error condition is present. The display remains dark.

- If the error occurs repeatedly, inform the installer.

Functional ground is not connected. The inverter must not feed into the grid for safety reasons.

- Inform the installer.

Event message

Description

Type

Residual current too high

Boost converter malfunction

Device overheated

Boost converter has wrong HW version

Boost converter not connected

The residual current flowing from the positive or negative input through the PV generators to ground exceeds the legally permissible value. The inverter is switched off automatically as long as this error condition is present.

- Inform the installer.

An internal component of the inverter is defective. The inverter does not feed into the grid or feeds into the grid with reduced power.

- Inform the installer.

Despite power reduction, the maximum permissible temperature has been exceeded. The inverter does not feed into the grid until the permissible temperature range has been reached.

- Check mounting conditions.

- If the error occurs repeatedly, inform the installer.

The inverter cannot detect an internal component, or the component does not match the other components. The inverter does not feed into the grid.

- Inform the installer.

The connection of the internal components is disrupted. The inverter does not feed into the grid.

- Inform the installer.

Boost converter defect

The boost converter is defective; the inverter does not feed into the grid or feeds into the grid with reduced power.

- Inform the installer.

Boost converter not

- Inform the installer.

recognised

Intern. info.

- If the error occurs repeatedly, inform the installer.

Intern. warning

- If the error occurs repeatedly, inform the installer.

Intern. error

- If the error occurs repeatedly, inform the installer.

763.134 Z02 1913 coolcept_fleX 51

Event message

Description

Type

Isolation error

No branding

No connection to the energy meter

L and N swapped

CountryCode failed

Country parameters invalid

The insulation resistance between positive or negative input and ground falls below the permissible value. The inverter does not feed into the grid.

- Inform the installer.

The inverter has wrong or inaccurate device data. The inverter does not feed into the grid.

- Inform the installer.

There is no communication connection or an incorrect communication connection between inverter and energy meter.

- Have the installer check the connection.

Outer and neutral conductors are connected the wrong way. The inverter must not feed into the grid for safety reasons.

- Inform the installer.

Inconsistency between the selected country setting and the one stored in the memory.

- Inform the installer.

The inverter cannot feed into the grid because it does not have valid parameters.

- Inform the installer.

Power reduction due to temperature

The inverter reduces its output power because the maximum temperature has been reached.

- Check mounting conditions.

- If the error occurs repeatedly, inform the installer.

Reading CountryCode failed

The inverter has not been able to read out the set country correctly.

- Inform the installer.

Fan faulty

The internal fan of the inverter is defective. The inverter does possibly feed into the grid with reduced power.

- Inform the installer.

52 763.134 Z02 1913 coolcept_fleX

Event message

Description

Type

Grid frequency too high for reactivation

Grid frequency too low for reactiviation

Grid frequency too high

Grid frequency too low

Grid relay defective

The inverter cannot feed in again after switchoff because the grid frequency exceeds the legally required switch-on value.

- If the error occurs repeatedly, inform the installer.

The inverter cannot feed in again after switchoff because the grid frequency falls below the legally required switch-on value.

- If the error occurs repeatedly, inform the installer.

The grid frequency present at the inverter exceeds the permissible value. The inverter is switched off automatically due to legal requirements as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

The grid frequency present at the inverter falls below the permissible value. The inverter is switched off automatically as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

The inverter has detected a defective grid relay and does not feed into the grid.

- Inform the installer.

Grid voltage too low for reactiviation

The inverter cannot feed in again after switchoff because the grid voltage falls below the legally required switch-on value.

- If the error occurs repeatedly, inform the installer.

Grid voltage Ø too high

The output voltage averaged over a legally stipulated period exceeds the permissible tolerance range. The inverter is switched off automatically as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

763.134 Z02 1913 coolcept_fleX 53

Event message

Description

Type

Grid voltage Ø too low

Grid voltage too high

Grid voltage too high for reactiviation

Grid voltage too low

The output voltage averaged over a legally stipulated period falls below the permissible tolerance range. The inverter is switched off automatically as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

The grid voltage present at the inverter exceeds the permissible value. The inverter is switched off automatically due to legal requirements as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

The inverter cannot feed in again after switchoff because the grid voltage exceeds the legally required switch-on value.

- If the error occurs repeatedly, inform the installer.

The grid voltage present at the inverter falls below the permissible value. The inverter is switched off automatically due to legal requirements as long as this error condition is present.

- If the error occurs repeatedly, inform the installer.

Grid current DC offset too high

The DC current share fed into the grid by the inverter exceeds the permissible value. The inverter is switched off automatically due to legal requirements as long as this error condition is present.

- Inform the installer.

PV voltage too high

The input voltage present at the inverter exceeds the permissible value.

- Switch off the DC disconnector of inverter and inform the installer.

PV current too high

The input current at the inverter exceeds the permissible value. The inverter limits the current to the permissible value.

- If the error occurs repeatedly, inform the installer.

54 763.134 Z02 1913 coolcept_fleX

Event message

Description

Type

RS485-Gateway activated

Self test failed

Software incompatible

Overheating HSS

It is not possible to communicate with the inverter via the RS485 interface.

- Disconnect inverter from the grid and restart (AC reset).

- Inform the installer.

An error has occurred during self-test; the selftest has been aborted.

- If the self-test is repeatedly aborted at different times of the day although the grid voltage and frequency lie within the limit values of the country setting, inform the installer.

After a firmware update the various software versions in the inverter do no longer match.

- Perform the firmware update again with a valid update file.

- If the error occurs repeatedly, inform the installer.

The maximum temperature of the boost converter has been exceeded. The inverter does not feed into the grid until the permissible temperature range has been reached.

- Check mounting conditions.

- If the error occurs repeatedly, inform the installer.

Time/date lost

The inverter has lost the time because it has been disconnected from the grid for too long. Storage of yield data is only possible with the wrong date.

- Correct the time in "Settings" > "Time/date".

763.134 Z02 1913 coolcept_fleX 55

Do not dispose of the inverter with household waste.

10 Maintenance and care

10.1 Maintenance

The inverter does not require any maintenance.

10.2 Care

The care of the inverter is limited to the following measures:

• Removing dust

• Cleaning

10.2.1 Removing dust

Remove dust from the cooling fins in the front and rear of the device by using compressed air of a maximum of 2 bar.

10.2.2 Cleaning

DANGER

Voltage. There is a risk of death by electrocution.

►

Only clean device with a slightly moist cloth.

Light soiling:

Clean surface of the inverter with a slightly moist cloth (use clear water).

Heavy soiling:

1. Clean surface of the inverter with a slightly moist cloth. In addition, use a cleaning agent without solvents or disinfectants, that does not contain any granular or sharpedged substances.

2. Remove any residues of the cleaning agent.

11 Disposal

►

Return the inverter to Steca customer service with the note: "For disposal".

►

The device packaging consists of recyclable materials.

56 763.134 Z02 1913 coolcept_fleX

12 Technical data

The values in the technical data have been determined at a temperature of 25 °C (77 °F).

12.1 StecaGrid 1511, 2011, 2511, 3011 and 3611

StecaGrid

1511

StecaGrid 2011

StecaGrid 2511

StecaGrid 3011

StecaGrid 3611

Installation altitude Max. 2000 m above sea level

DC input side (PV generator connection)

Max. input voltage 450 V 750 V

MPP voltage range 75 V to 360 V

125 V to

600 V

Operating voltage range at nominal

120 V to

360 V

160 V to

360 V

200 V to

360 V

230 V to

600 V

power

Number of MPP

trackers

Max. input current 13 A

Max. input power with

1540 W 2050 W 2560 W 3070 W 3770 W max. output active power

Max. short-circuit

15 A

current

AC output side (grid connection)

Output voltage 185 V to 276 V

150 V to

600 V

280 V to

600 V

Nominal output voltage 230 V

Max. output current 12 A 12 A 14 A 14 A 16 A

Max. active power

1500 W 2000 W 2500 W 3000 W 3680 W (cosPhi = 1)

Maximum apparent

1500 VA 2000 VA 2500 VA 3000 VA 3680 VA

power

Nominal power 1500 W 2000 W 2500 W 3000 W 3680 W

Nominal frequency 50 Hz and 60 Hz

763.134 Z02 1913 coolcept_fleX 57

StecaGrid

1511

2011

2511

3011

3611

Grid frequency 45 Hz to 65 Hz

Power loss during

< 3 W

nighttime operation

Feed-in phases One-phase

Distortion factor

< 3 %

(cosPhi = 1)

Power factor cosPhi 0.8 capacitive to 0.8 inductive

Highest output fault

0.0 A

current

Highest overcurrent

28 A 40 A

protection

Characterisation of the operating behaviour

Max. efficiency 97.40 % 97.40 % 97.40 % 97.00 % 97.00 %

European efficiency 96.10 % 96.50 % 96.60 % 96.30 % 96.30 %

MPP efficiency > 99.7 % (static), > 99 % (dynamic)

Internal consumption < 20 W

Power derating (power reduction) at full power

50 °C (T

amb

)

45 °C (T

amb

)

from

Safety

Isolation principle No galvanic isolation, without transformer

Grid monitoring Yes, integrated

Residual current monitoring

Yes, integrated (the inverter cannot cause a DC residual

current due to the design)

Protection class Protection class 2 (RCD type A sufficient)

Operating conditions

Area of application Indoors, outdoors (degree of soiling 3)

Climate category i.a.w.

4K4H

IEC 60721-3-4

Ambient temperature -25 °C to +60 °C

58 763.134 Z02 1913 coolcept_fleX

StecaGrid

1511

2011

2511

3011

3611

Storage temperature -30 °C to +80 °C

Relative humidity 0 % to 100 %, non-condensing

Noise emission

31 dB(A)

(typical)

Equipment and design

Degree of protection IP 65

Overvoltage category III (AC), II (DC)

DC connection

Phoenix Contact SUNCLIX (1 pair), mating plugs included in

the scope of delivery

AC connection

Wieland RST25i3 plug, mating plug included in the scope of

delivery

Dimensions 399 x 657 x 222 mm

Weight 11.7 kg 12.4 kg

Communication interfaces

RS-485 (1 x RJ45 socket: connection to Meteocontrol

WEB’log or Solar-Log™), Ethernet interface (1 x RJ45),

Modbus RTU (1 x RJ45 socket: connection to energy meter)

Integrated DC

Yes, conform to DIN VDE 0100-712

disconnector

Cooling principle

Temperature controlled fan, variable-speed, internal

(dust-protected)

Test certificate

Refer to certificates download at the product page of

homepage

763.134 Z02 1913 coolcept_fleX 59

12.2 StecaGrid 3011_2, 3611_2 and 4611_2

StecaGrid

3011_2

StecaGrid 3611_2

StecaGrid 4611_2

Installation altitude Max. 2000 m above sea level

DC input side (PV generator connection)

Max. input voltage 750 V

MPP voltage range

Operating voltage range at nominal power

125 V to

600 V

230 V to

600 V

150 V to

600 V

280 V to

600 V

150 V to

600 V

360 V to

600 V

Number of MPP trackers 2

Max. input current 2 x 13 A

Max. input power with max. output

3070 W 3770 W 4740 W

active power

Max. short-circuit current 15 A

AC output side (grid connection)

Output voltage 185 V to 276 V

Nominal output voltage 230 V

Max. output current 14 A 16 A 20 A

Max. active power (cosPhi = 1) 3000 W 3680 W 4600 W

Maximum apparent power 3000 VA 3680 VA 4600 VA

Nominal power 3000 W 3680 W 4600 W

Nominal frequency 50 Hz and 60 Hz

Grid frequency 45 Hz to 65 Hz

Power loss during nighttime

< 3 W

operation

Feed-in phases One-phase

Distortion factor (cosPhi = 1) < 3 %

Power factor cosPhi 0.8 capacitive to 0.8 inductive

Highest output fault current 0.0 A

60 763.134 Z02 1913 coolcept_fleX

StecaGrid

Highest overcurrent protection at

3011_2

40 A 40 A 57 A

3611_2

4611_2

the output

Characterisation of the operating behaviour

Max. efficiency 97.00 % 97.00 % 97.40 %

European efficiency 96.30 % 96.30 % 96.90 %

MPP efficiency > 99.7 % (static), > 99 % (dynamic)

Internal consumption < 20 W

Power derating at full power from 45 °C (T

) 45 °C (T

amb

) 40 °C (T

amb

Safety

Isolation principle No galvanic isolation, without transformer

Grid monitoring Yes, integrated

Residual current monitoring

Yes, integrated (the inverter cannot cause a DC

residual current due to the design)

Protection class Protection class 2 (RCD type A sufficient)

Operating conditions

Area of application Indoors, outdoors (degree of soiling 3)

)

Climate category i.a.w.

4K4H

IEC 60721-3-4

Ambient temperature -25 °C to +60 °C

Storage temperature -30 °C to +80 °C

Relative humidity 0 % to 100 %, non-condensing

Noise emission (typical) 31 dB(A)

Equipment and design

Degree of protection IP 65

Overvoltage category III (AC), II (DC)

DC connection

Phoenix Contact SUNCLIX (2 pair), mating plugs

included in the scope of delivery

763.134 Z02 1913 coolcept_fleX 61

StecaGrid

AC connection

3011_2

Wieland RST25i3 plug, mating plug included in

3611_2

4611_2

the scope of delivery

Dimensions 399 x 657 x 222 mm

Weight 13 kg 13 kg 13.1 kg

Communication interfaces

RS-485 (1 x RJ45 socket: connection to

Meteocontrol WEB’log or Solar-Log™), Ethernet

interface (1 x RJ45), Modbus RTU (1 x RJ45

socket: connection to energy meter)

Integrated DC disconnector Yes, conform to DIN VDE 0100-712

Cooling principle

Temperature controlled fan, variable-speed,

internal (dust-protected)

Test certificate

Refer to certificates download at the product page

of homepage

13 Table of countries

The country of use is set by the installer during the installation of the device. The countryspecific grid parameters will vary depending on the set country of use.

Due to legal requirements, the country.specific values may change at short notice. Any information on the current grid parameters of the countries of use are available in the download area of the Steca homepage.

14 Liability, warranty

The conditions for the device are available for downloading on the Steca homepage:

http://www.steca.com/pv-grid/warranties

62 763.134 Z02 1913 coolcept_fleX

15 Contact

In the event of complaints or faults, please contact your local dealer, where you purchased the product. He will assist you in all respects.

Contact in Europe:

Steca Elektronik GmbH Mammostrasse 1 87700 Memmingen Germany

Phone: +49 (0) 8331 8558-833 +49 700 STECAGRID Fax: +49 (0) 8331 8558-132 Web: www.steca.com

16 Annex

16.1 Drilling pattern for wall mounting

763.134 Z02 1913 coolcept_fleX 63

Steca Elektronik GmbH Mammostraße 1 87700 Memmingen Germany T +49-(0)8331-8558-0 F +49-(0)8331-8558-131

www.steca.de 763.134

Steca coolcept fleX StecaGrid 1511, coolcept fleX StecaGrid 3611, coolcept fleX StecaGrid 2011, coolcept fleX StecaGrid 2511, coolcept fleX StecaGrid 3011 Technical Information

Specifications and Main Features

Frequently Asked Questions

User Manual

1 General information

1.1 Types

1.2 Accessories

1.3 Documents

1.4 Monitoring portal

1.5 Scope of delivery

1.6 Labelling

1.7 Type plate

1.8 EU Declaration of Conformity

1.9 Abbreviations

2 Safety

2.1 General safety instructions

2.2 Designated use

2.3 Target group

2.4 Labels and symbols

2.4.1 Safety marks

2.4.2 Keywords

2.5 Safety symbols on the device

3 Structure and functioning

3.1 Structure of the inverter

3.2 Connections

3.3 Operating buttons

3.3.1 Functions of the operating buttons

3.4 Display

3.5 Cooling

3.6 Grid monitoring

3.7 Data

3.7.1 Data communication

3.7.2 Data display

3.7.3 Data storage

3.8 Network (TCP/IP)

3.9 "COM1" and "COM2" connections

3.9.1 Connecting further master devices

3.9.2 Connecting further inverters

3.9.3 Alternative RS485 data connecting cable

3.9.4 RS485 termination

3.9.5 RS485 addressing

3.9.6 Connecting an energy meter (Modbus RTU)

4 Installing the inverter

4.1 Safety instructions for installation

4.2 Mounting the inverter

4.2.1 Attaching the mounting plate

4.3 Preparing AC connection

4.3.1 Selecting AC cable

4.3.2 Residual current circuit breaker

4.3.3 Assembling the AC plug

4.4 Preparing DC connection

4.4.1 Fitting cable to DC plug

4.4.2 Preparing data connecting cable

4.5 Connecting inverter and switching AC on

4.6 Performing initial commissioning

4.7 Setting the feed-in management

4.7.1 Switching the energy meter on or off

4.7.2 Limiting the dynamic feed-in value

4.7.3 Selecting an energy meter

4.8 Switching DC on

5 Initial commissioning

5.1 Setting the display language

5.2 Setting the date and time

5.3 Setting the country

5.4 Setting the reactive power

5.4.1 Setting the mode

5.4.2 Changing parameters of the nodes

5.4.3 Displaying the reactive power characteristic curve

5.5 Finishing the initial commissioning

6 Dismounting the inverter

6.1 Switching AC and DC off

6.3 Disconnecting AC plug from inverter

6.4 Opening the AC plug

7 Operation

7.1 Menu structure

7.2 Navigating the menu structure

7.3 Status displays

7.3.1 Displaying output power

7.4 Main menu

7.4.1 Displaying yields