SMA Sunny Boy 2500 Installation Manual
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SMA Sunny Boy 2500 Installation Manual

String inverter
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Sunny Boy 2500

String Inverter Sunny Boy 2500
Installation Guide
Version 1.2
SB2500-11:SE2006
IME-SB2500

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Summary of Contents for SMA Sunny Boy 2500

  • Page 1: Sunny Boy

    Sunny Boy 2500 String Inverter Sunny Boy 2500 Installation Guide Version 1.2 SB2500-11:SE2006 IME-SB2500...
  • Page 3 Technologie AG Explanation of Symbols used in this Document Explanation of Symbols used in this document This symbol indicates information that is essential for a trouble-free and safe operation of the product. Please read these sections care- fully in order to avoid any damages of the equipment and for op- timal personal protection.
  • Page 4 Liability limitation: SMA Technologie AG disclaims liability for any direct or indirect consequential damages arising from the use of the software produced by SMA Technologie AG. The same applies for the provision and/or non-provision of support. Provided software not produced by SMA Technologie AG is subject to the respective licensing and liability agreements of the manufacturer.

  • Page 5: Table Of Contents

    Device description ....... . .32 Sunny Boy 2500 Operating parameters ....33 Replacing the varistors .
  • Page 6 Table of Contents Technologie AG Page 6 SB2500-11:SE2006 Installation Guide...

  • Page 7: Foreword

    The Sunny Boy 2500 is equipped with the SMA grid guard. This is a type of independent disconnection device. It ensures that the Sunny Boy 2500 complies with the VDEW (Verband der Elektrizitätswirtschaft –...
  • Page 8 Foreword Technologie AG Page 8 SB2500-11:SE2006 Installation Guide...

  • Page 9: Safety Information

    You must also make sure that no voltage is present in the device. The electronics inside your Sunny Boy 2500 is vulnerable in terms of electrostatic discharge. Be sure to be connected to ground (e.g.
  • Page 10 Safety information Technologie AG Page 10 SB2500-11:SE2006 Installation Guide...

  • Page 11: Overview

    Technologie AG Overview 3 Overview 3.1 Unit description The following diagram gives a schematic overview of the various components and connection points inside the Sunny Boy 2500 with the lid removed: Socket for communication Varistors (RS232, RS485, NLM Piggy- page 35...

  • Page 12: External Dimensions

    Overview Technologie AG 3.2 External dimensions 214 mm 434 mm 295 mm Page 12 SB2500-11:SE2006 Installation Guide...

  • Page 13: Installation Requirements

    The ambient temperature must not be outside the range of - 25 °C to +60 °C. The Sunny Boy 2500 should be installed in a place where it is not 30 kg exposed to direct sunlight. An increased ambient temperature can reduce the yield of the PV system.
  • Page 14 When choosing the installation site, ensure there is enough space for heat to dissipate. Under normal conditions, the following guidelines should be applied for the space to be kept clear around the Sunny Boy 2500: Minimum clearance Sides...

  • Page 15: Pv Generator Requirements

    Technologie AG Installation requirements 4.2 PV generator requirements The Sunny Boy 2500 is designed to be connected to up to two strings (PV modules wired in series) having a homogenous structure (modules of the same type, identical orientation and tilt).
  • Page 16 Installation requirements Technologie AG Rating for a line circuit breaker in a photovoltaic electrical power unit operated in parallel with the low-voltage grid Various factors should be taken into account when selecting line circuit breakers. These include, for example: • The type of cable used (conductor material and insulation) •...
  • Page 17 Technologie AG Installation requirements The system impedance at the installation site of the Sunny Boy 2500 must be less than 1 Ohms for the islanding detection and the fuses to work porperly. In addition, we recommend dimensioning the conductor cross-section so that line losses do not exceed 1% at the nominal power.
  • Page 18 Installation requirements Technologie AG The Sunny Boy 2500 is designed for operation on 230 V grids and works at grid voltages of 198 V to 260 V at 49.8 Hz to 50.2 Hz. All settings shown below are based on the German standard DIN VDE 0126. You are also able to use other settings.

  • Page 19: Installation

    5.1 Mounting the unit To make the job easier, we recommend you use the supplied wall bracket to mount the Sunny Boy 2500. For vertical installation on solid concrete or block walls, for example, you can fit the bracket using 8 mm x 50 mm hexagon bolts to DIN 571 standard, stainless steel type, and with wall plugs type SX8.

  • Page 20: Electrical Installation

    Installation Technologie AG 5.2 Electrical installation Check the correct polarity before you connect the PV-strings! The complete wiring for a Sunny Boy 2500 is shown schematically in the following diagram: Page 20 SB2500-11:SE2006 Installation Guide...

  • Page 21: Connecting The Ac Output

    AC cable. To connect up the AC output, follow these steps: Check the grid voltage. If this is higher than 260 V, the Sunny Boy 2500 will not be fully operational. In this case, contact the local grid operator for assistance.
  • Page 22 Installation Technologie AG Connecting the AC output with PG13.5 To connect a cable with a maximum cross-section of 13.5 mm², proceed as follows. Press the sealing ring into the cord grip. Cord grip Sealing ring Now slide the pressure screw over the cable first of all, followed by the cord grip with the sealing ring in it.
  • Page 23 AC connecting socket to the flange plug to seal the connection and secure it. Do not switch the line circuit breaker on yet! The Sunny Boy 2500 may only be connected to the AC grid once the PV strings are connected and the device is securely closed.
  • Page 24 Installation Technologie AG Connecting the AC plug with PG16 To connect a cable with a cross-section between 13.5 mm² and 16 mm², proceed as follows. First of all, slide the pressure screw with the PG16 screw fitting onto the cable. Now slide the threaded sleeve over the cable.
  • Page 25 AC connecting socket to the flange plug to seal the connection and secure Do not switch the line circuit breaker on yet! The Sunny Boy 2500 may only be connected to the AC grid once the PV strings are connected and the device is securely closed.
  • Page 26 Its approximate location can be deduced from the relationships between the voltages. Do not connect strings to the Sunny Boy 2500 that contain a ground contact until you have fixed the ground contact in the PV generator.

  • Page 27: Startup

    If despite checking the string voltages the LED signal occurs again when the PV generator is connected to the Sunny Boy 2500, disconnect the PV generator from the Sunny Boy again and contact SMA Technologie AG (see section 10 "Contact"...
  • Page 28 Installation Technologie AG Green Yellow Status OK (grid feeding) failure OK (initialization) OK (stop) blinking quickly (3 x per second) failure OK (waiting, grid on / blinking monitoring) (1 x per second) failure on / blinking OK (derating) (shortly off 1 x failure per second) OK (stand-by)

  • Page 29: Opening And Closing The Sunny Boy

    2500 by tightening the four screws evenly. Connect the PV generator. Switch the line circuit breaker to the „on“ position. Now check whether the LED display on the Sunny Boy 2500 indicates that the device is functioning correctly. Installation Guide...
  • Page 30 Opening and closing the Sunny Boy Technologie AG Page 30 SB2500-11:SE2006 Installation Guide...

  • Page 31: Technical Data

    Technologie AG Technical data 7 Technical data 7.1 PV generator connection data Max. input open circuit voltage 600 V PV 0 (based on -10 °C cell temperature) Input voltage, MPP range 224 V ... 600 V Max. input current 12 A PV max Max.

  • Page 32: Device Description

    European standard efficiency 93.2 % eur o The efficiency of the Sunny Boy 2500 depends mainly on the input voltage of the connected PV strings. The lower the input voltage the higher is the efficiency of the Sunny Boy 2500Sunny Boy 2500.

  • Page 33: Sunny Boy 2500 Operating Parameters

    Technologie AG Technical data 7.4 Sunny Boy 2500 Operating parameters Unauthorised changes to the operating parameters may result in: • Injury or accidents as a result of changing the internal safety routines in the Sunny Boy • Voiding the Sunny Boy's operating approval certificate •...
  • Page 34 Unit Value range Factory Description setting Plimit 2500 Upper limit for AC output power SMA-SN Serial number of the Sunny Boy Software-BFR / Firmware version of the operation control Firmware-BFR unit (BFR) Software-SRR / Firmware version of the current control...

  • Page 35: Replacing The Varistors

    Replacing the varistors 8 Replacing the varistors The Sunny Boy 2500 is a complex high-technology device. As a result, the possibilities for fixing faults on site are limited to just a few items. Please don't try to carry out repairs other than those described here. Use the SMA Technologie AG 24- hour exchange service and repair service instead.
  • Page 36 Using a continuity tester, check all the varistors to see if there is a conducting connection between connectors 2 and 3. If there isn't, then that varistor is not working. The positions of the varistors in the Sunny Boy 2500 can be seen in the diagram in section 3.1 "Unit description" (page 11).
  • Page 37 Sunny Boy 2500 indicates that the device is functioning correctly. If no ground contact and no defective varistor were found, there is probably a fault in the Sunny Boy. In this case, contact the SMA hotline to discuss what to do next. Installation Guide SB2500-11:SE2006...
  • Page 38 Replacing the varistors Technologie AG Page 38 SB2500-11:SE2006 Installation Guide...

  • Page 39: Rating For A Line Circuit Breaker

    Example for the thermal rating for a line circuit breaker in a photovoltaic electrical power unit operated in parallel with the low-voltage grid We assume a PV system with 9 Sunny Boy 2500 inverters, with three inverters per phase. Betrie...
  • Page 40 Rating for a line circuit breaker Technologie AG Example for the thermal selection of a 10 A line circuit breaker with B sensitivity with no gap between the circuit breakers: For example, one manufacturer's circuit breaker may be designed for an ambient temperature of 50 °C.
  • Page 41 Technologie AG Rating for a line circuit breaker Conclusion The selected line circuit breaker cannot be used in our example case since the maximum current-carrying capacity for fault-free operation is lower than the maximum output current of the inverter used. It will trip under rated operating conditions! In this case one solution would be to ensure there is an 8 mm gap between the circuit breakers.
  • Page 42 Rating for a line circuit breaker Technologie AG Page 42 SB2500-11:SE2006 Installation Guide...

  • Page 43: Contact

    Technologie AG Contact 10 Contact If you have any questions or technical problems concerning the Sunny Boy 2500, please contact our hotline. Please have the following information available when you contact SMA: • Inverter type • Type and number of connected modules •...
  • Page 44 Contact Technologie AG Page 44 SB2500-11:SE2006 Installation Guide...
  • Page 46 SMA Technologie AG www.SMA.de Hannoversche Straße 1–5 34266 Niestetal Germany Tel. +49 561 9522 0 info@SMA.de SMA Solartechnology China Vertrieb SMA Italien International Metro Center, Via Lorenzo Valla, 16 Building A, City Square No. Jia 3, 20141 Milano Shilipu Road, Changyang District Italy 100025 Beijing, PR.

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