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SMA Solar Technology FLEXIBLE STORAGE SYSTEM System Description

With batterybackup function
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System Description
SMA FLEXIBLE STORAGE SYSTEM with Battery-
Backup Function
Battery-Backup Systems including Increased Self-Consumption with
SUNNY ISLAND 4.4M / 6.0H / 8.0H and SUNNY HOME MANAGER
ENGLISH
SI44M-80H-13-BBF-IA-en-10 | Version 1.0

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  • Page 1 System Description SMA FLEXIBLE STORAGE SYSTEM with Battery- Backup Function Battery-Backup Systems including Increased Self-Consumption with SUNNY ISLAND 4.4M / 6.0H / 8.0H and SUNNY HOME MANAGER ENGLISH SI44M-80H-13-BBF-IA-en-10 | Version 1.0...
  • Page 2 Legal Provisions The information contained in these documents is the property of SMA Solar Technology AG. No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA Solar Technology AG.

  • Page 3: Table Of Contents

    SMA Solar Technology AG Table of Contents Table of Contents Information on this Document..................... Validity ................................Target Group ..............................Content and Structure of this Document......................Levels of Warning Messages.......................... Symbols in the Document..........................Typographies in the Document ........................Designation in the document ..........................
  • Page 4 Table of Contents SMA Solar Technology AG 5.2.4 Connecting the Slaves ............................. 39 Commissioning ..........................41 Commissioning Procedure..........................41 Testing the Automatic Transfer Switch Function ..................... 41 Adjusting the Configuration of the Sunny Island ................... 44 Adjusting the Configuration of the PV Inverters ..................... 44 Activating Phase Coupling in Single-Phase Battery-Backup Systems ............

  • Page 5: Information On This Document

    • Knowledge of and compliance with the documents of the battery manufacturer with all safety information Content and Structure of this Document This document summarizes the specific information for the SMA Flexible Storage System with battery-backup function (battery-backup system). Circuitry overviews provide the basic principle of how an system must be connected. The structure of this document specifies the chronological sequence for configuration and commissioning.

  • Page 6: Symbols In The Document

    1 Information on this Document SMA Solar Technology AG Symbols in the Document Symbol Explanation Information that is important for a specific topic or goal, but is not safety-relevant Indicates a requirement for meeting a specific goal ☐ Desired result ☑...

  • Page 7: Explanation Of Used Terms

    SMA Solar Technology AG 1 Information on this Document Explanation of Used Terms Term Explanation Grid failure Utility grid failure or deviation from the country-specific thresholds for voltage and frequency Automatic transfer switch with disconnects the battery-backup grid from the utility grid in the event of grid fail- battery-backup function ure.

  • Page 8: Safety

    2 Safety SMA Solar Technology AG 2 Safety Intended Use An SMA Flexible Storage System with battery-backup function (battery-backup system) takes care of the uninterrupted supply of the loads with electricity during a grid failure. An automatic transfer switching device disconnects the household grid with the PV system from the utility grid. When this happens, a battery inverter forms a battery-backup grid and the PV system can supply the loads.

  • Page 9: Important Safety Instructions

    Alterations to the SMA products, e.g., changes or modifications, are only permitted with the express written permission of SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such changes.
  • Page 10 2 Safety SMA Solar Technology AG DANGER Danger to life due to electric shock when live components or cables are touched High voltages are present in the conductive components or cables of the product. Touching live parts and cables results in death or lethal injuries due to electric shock.
  • Page 11 SMA Solar Technology AG 2 Safety WARNING Danger to life due to fire or explosion In rare cases, an explosive gas mixture can be generated inside the inverter under fault conditions. In this state, switching operations can cause a fire inside the inverter or explosion. Death or lethal injuries due to hot or flying debris can result.
  • Page 12 Sunny Portal or the use of FTP push. High costs for the Internet connection can be the result. • SMA Solar Technology AG recommends using an Internet flat rate. SI44M-80H-13-BBF-IA-en-10...

  • Page 13: Battery Safety Information

    SMA Solar Technology AG 2 Safety The inverter supports different firmware versions that are suitable for different systems. Inverters using firmware version ≤ 2.99.99.R are suitable for off-grid systems and systems that are not subject to the European grid connection conditions in accordance with Regulation (EU) 2016/631 for establishing a network code (also known as RfG).
  • Page 14 2 Safety SMA Solar Technology AG WARNING Chemical burns due to battery electrolyte If handled inappropriately, battery electrolyte can leak from the battery and cause irritation to the eyes, respiratory system and skin. • Install, operate, maintain and dispose of the battery according to the manufacturer’s specifications.

  • Page 15: Functions And Design

    SMA Solar Technology AG 3 Functions and Design 3 Functions and Design Information on Battery-Backup Systems Wiring and connection of automatic transfer switches for single-phase or three-phase battery- backup systems • Do not bridge the neutral conductors of connections X1 to X5 in the automatic transfer switch. If the neutral conductor connections are bridged, residual-current devices could trip accidentally.
  • Page 16 3 Functions and Design SMA Solar Technology AG An SMA Flexible Storage System with battery-backup function (battery-backup system) takes care of the uninterrupted supply of the loads with electricity during a grid failure. An automatic transfer switching device disconnects the household grid with the PV system from the utility grid. When this happens, a battery inverter forms a battery-backup grid and the PV system can supply the loads.

  • Page 17: Design And Functions Of The Automatic Transfer Switch

    SMA Solar Technology AG 3 Functions and Design Design and Functions of the Automatic Transfer Switch 3.3.1 Devices of the Automatic Transfer Switch Figure 2: Schematic diagram of a single-phase automatic transfer switch with all-pole disconnection (example) An automatic transfer switch provides the following functions: •...

  • Page 18: Grid Disconnection

    Within the automatic transfer switch, a tie switch disconnects the battery-backup grid from the utility grid. The conditions at the tie switch differ depending on the installation site. SMA Solar Technology AG offers two basic structures for grid disconnection, which differ as far as the tie switch is concerned: •...

  • Page 19: Grounding Device For The Battery-Backup Grid

    SMA Solar Technology AG 3 Functions and Design When the utility grid is available again, the Sunny Island detects this. The Sunny Island synchronizes the battery- backup grid with the utility grid. Following successful synchronization, multifunction relay Relay1 goes into non- operative mode and contactors Q2 and Q3 are activated. The battery-backup grid is again connected to the utility grid.

  • Page 20: Requirements Of Vde Application Guide 2510-2

    3 Functions and Design SMA Solar Technology AG Phase coupling can be switched on independently for the other line conductors. Phase coupling is only suitable for battery-backup grids with single-phase PV inverters and single-phase loads. Operating principle of phase coupling Contactor Q6 is the phase coupler (see Section 3.3.1, page 17).

  • Page 21: Battery-Backup Systems With All-Pole Disconnection

    SMA Solar Technology AG 4 Battery-Backup Systems With All-Pole Disconnection 4 Battery-Backup Systems With All-Pole Disconnection Single-phase battery-backup system with all-pole disconnection 4.1.1 Automatic Transfer Switching Device for Single-Phase Battery-Backup System with All-Pole Disconnection System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 22: Circuitry Overview For Single-Phase Battery-Backup System With All-Pole Disconnection

    4 Battery-Backup Systems With All-Pole Disconnection SMA Solar Technology AG 4.1.2 Circuitry Overview for single-Phase Battery-Backup System with All-Pole Disconnection SI44M-80H-13-BBF-IA-en-10 System Description...

  • Page 23: Connection Of The Sunny Island

    SMA Solar Technology AG 4 Battery-Backup Systems With All-Pole Disconnection 4.1.3 Connection of the Sunny Island NO C NO C Relay 1 Relay 2 F G H I Figure 3: Connection of the Sunny Island Position Designation Description / information Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and...
  • Page 24 4 Battery-Backup Systems With All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Measuring cable of the battery Sunny Island: connection BatTmp temperature sensor You only have to connect a battery temperature sensor if lead-acid batteries are used. Mount the battery temperature sensor in the middle of the battery- storage system, in the upper third of the battery cell.

  • Page 25: Three-Phase Battery-Backup System With All-Pole Disconnection

    SMA Solar Technology AG 4 Battery-Backup Systems With All-Pole Disconnection Three-Phase Battery-Backup System with All-Pole Disconnection 4.2.1 Automatic Transfer Switching Device for Three-Phase Battery-Backup System with All-Pole Disconnection System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 26: Circuitry Overview For Three-Phase Battery-Backup System With All-Pole Disconnection

    4 Battery-Backup Systems With All-Pole Disconnection SMA Solar Technology AG 4.2.2 Circuitry Overview for Three-Phase Battery-Backup System with All-Pole Disconnection SI44M-80H-13-BBF-IA-en-10 System Description...

  • Page 27: Connecting The Master With All-Pole Disconnection

    SMA Solar Technology AG 4 Battery-Backup Systems With All-Pole Disconnection 4.2.3 Connecting the Master with All-Pole Disconnection NO C NO C Relay 1 Relay 2 F G H I Figure 4: Connecting the master with all-pole disconnection Position Designation Description / information Cable for the control Sunny Island: connection AC1 Loads/SunnyBoys terminals L and N...
  • Page 28 4 Battery-Backup Systems With All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Measuring cable of Sunny Island: connection BatTmp the battery tempera- You only have to connect a battery temperature sensor if lead-acid batteries are ture sensor used.

  • Page 29: Connecting The Slaves

    SMA Solar Technology AG 4 Battery-Backup Systems With All-Pole Disconnection 4.2.4 Connecting the Slaves NO C NO C Relay 1 Relay 2 Figure 5: Connecting the slaves Position Designation Description / information AC power cable Sunny Island: connection to AC2 Gen/Grid terminals L, N...
  • Page 30 4 Battery-Backup Systems With All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Data cable for the in- Sunny Island: terminal ComSync In ternal communication With slave 1: connection of internal communication bus of the master in the cluster With slave 2: connection of internal communication bus of slave 1 Data cable for the in- Sunny Island: terminal ComSync Out...

  • Page 31: Battery-Backup Systems Without All-Pole Disconnection

    SMA Solar Technology AG 5 Battery-Backup Systems Without All-Pole Disconnection 5 Battery-Backup Systems Without All-Pole Disconnection Single-Phase Battery-Backup System without All-Pole Disconnection 5.1.1 Automatic Transfer Switching Device for Single-Phase Battery-Backup System without All-Pole Disconnection System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 32: Circuitry Overview For Single-Phase Battery-Backup System Without All-Pole Disconnection

    5 Battery-Backup Systems Without All-Pole Disconnection SMA Solar Technology AG 5.1.2 Circuitry Overview for Single-Phase Battery-Backup System without All- Pole Disconnection SI44M-80H-13-BBF-IA-en-10 System Description...

  • Page 33: Connection Of The Sunny Island

    SMA Solar Technology AG 5 Battery-Backup Systems Without All-Pole Disconnection 5.1.3 Connection of the Sunny Island NO C NO C Relay 1 Relay 2 F G H I Figure 6: Connection of the Sunny Island Position Designation Description / information Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and...
  • Page 34 5 Battery-Backup Systems Without All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Measuring cable of the battery Sunny Island: connection BatTmp temperature sensor You only have to connect a battery temperature sensor if lead-acid batteries are used. Mount the battery temperature sensor in the middle of the battery- storage system, in the upper third of the battery cell.

  • Page 35: Three-Phase Battery-Backup System Without All-Pole Disconnection

    SMA Solar Technology AG 5 Battery-Backup Systems Without All-Pole Disconnection Three-Phase Battery-Backup System without All-Pole Disconnection 5.2.1 Automatic Transfer Switching Device for Three-Phase Battery-Backup System without All-Pole Disconnection System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 36: Circuitry Overview For Three-Phase Battery-Backup System Without All-Pole Disconnection

    5 Battery-Backup Systems Without All-Pole Disconnection SMA Solar Technology AG 5.2.2 Circuitry Overview for Three-Phase Battery-Backup System without All- Pole Disconnection SI44M-80H-13-BBF-IA-en-10 System Description...

  • Page 37: Connecting The Master Without All-Pole Disconnection

    SMA Solar Technology AG 5 Battery-Backup Systems Without All-Pole Disconnection 5.2.3 Connecting the Master without All-Pole Disconnection NO C NO C Relay 1 Relay 2 E F G Figure 7: Connecting the master Position Designation Description / information AC power cable Sunny Island: connection to AC2 Gen/Grid terminals L, N...
  • Page 38 5 Battery-Backup Systems Without All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Control cable of the Sunny Island: connection Relay1 terminals C and NC tie switch Automatic transfer switch: connection X4 terminals 1 and 2 If the multifunction relay activates, the contactor of the tie switch deactivates.

  • Page 39: Connecting The Slaves

    SMA Solar Technology AG 5 Battery-Backup Systems Without All-Pole Disconnection 5.2.4 Connecting the Slaves NO C NO C Relay 1 Relay 2 Figure 8: Connecting the slaves Position Designation Description / information AC power cable Sunny Island: connection to AC2 Gen/Grid terminals L, N...
  • Page 40 5 Battery-Backup Systems Without All-Pole Disconnection SMA Solar Technology AG Position Designation Description / information Data cable for the in- Sunny Island: terminal ComSync In ternal communication With slave 1: connection of internal communication bus of the master in the cluster With slave 2: connection of internal communication bus of slave 1 Data cable for the in- Sunny Island: terminal ComSync Out...

  • Page 41: Commissioning

    SMA Solar Technology AG 6 Commissioning 6 Commissioning Commissioning Procedure Before commissioning the system, you must make various settings. This section describes the procedure and gives an overview of the steps, which must always be performed in the prescribed sequence.
  • Page 42 6 Commissioning SMA Solar Technology AG Requirements: ☐ In the automatic transfer switch, all circuit breakers, F1, F3, F4, F5, and F6, must be open. ☐ The residual-current devices F2 and F7 must be closed. ☐ All Sunny Island inverters must be switched on but not operational.
  • Page 43 SMA Solar Technology AG 6 Commissioning 6. Check whether the residual-current devices trip correctly and are correctly wired: Test point Task Residual-current device F7 Press the test button and measure whether there is voltage present at connection X3. If voltage is present, correctly wire residual-current device F7.

  • Page 44: Adjusting The Configuration Of The Sunny Island

    6 Commissioning SMA Solar Technology AG 13. Check whether the phase coupling switches correctly. To do this, close circuit breakers F3 and F4 and check the following: Test point Task Connection X2 Measure if there is voltage present between the line conductors and the neutral conductor.

  • Page 45: Activating Phase Coupling In Single-Phase Battery-Backup Systems

    NOTICE Damage to three-phase loads during phase coupling If three-phase loads are connected to a single-phase utility grid with phase coupling, SMA Solar Technology AG cannot rule out damage to the three-phase loads. • Ensure that, during phase coupling, only single-phase loads are connected to the battery-backup grid.
  • Page 46 6 Commissioning SMA Solar Technology AG Required data for registration in Sunny Portal: Device / customer data Required data and explanation Sunny Home Manager 2.0 • Serial number (PIC) and registration ID (RID) Register the new system in Sunny Portal using the PIC and RID.

  • Page 47: Commissioning A System Without Increased Self-Consumption

    SMA Solar Technology AG 6 Commissioning 5. Only when one Sunny Home Manager 2.0 and one SMA Energy Meter are installed in the local network, assign the grid feed-in meter and purchased electricity meter to the Sunny Island via the user interface. To do this, enter the serial number of the grid feed-in meter and purchased electricity meter (see the Sunny Explorer operating...

  • Page 48: Only For Belgium: Connection Of Battery-Backup Systems With Sunny Island

    7 Only for Belgium: connection of battery-backup systems with SMA Solar Technology AG Sunny Island 7 Only for Belgium: connection of battery-backup systems with Sunny Island Automatic Transfer Switching Device for Single-Phase Battery-Backup System in Belgium Figure 9: Schematic diagram of the single-phase automatic transfer switch for Belgium...

  • Page 49: Circuitry Overview For Single-Phase Battery-Backup System In Belgium

    SMA Solar Technology AG 7 Only for Belgium: connection of battery-backup systems with Sunny Island Circuitry Overview for Single-Phase Battery-Backup System in Belgium Figure 10: Connection of the automatic transfer switching device with all-pole disconnection for Belgium System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 50: Automatic Transfer Switching Device For Three-Phase Battery-Backup System In Belgium

    7 Only for Belgium: connection of battery-backup systems with SMA Solar Technology AG Automatic Transfer Switching Device for Three-Phase Battery-Backup System in Belgium Figure 11: Schematic diagram of the three-phase automatic transfer switch for Belgium SI44M-80H-13-BBF-IA-en-10 System Description...

  • Page 51: Circuitry Overview For Three-Phase Battery-Backup System In Belgium

    SMA Solar Technology AG 7 Only for Belgium: connection of battery-backup systems with Circuitry Overview for Three-Phase Battery-Backup System in Belgium Figure 12: Connection of the automatic transfer switching device with all-pole disconnection for Belgium System Description SI44M-80H-13-BBF-IA-en-10...

  • Page 52: Contact

    8 Contact SMA Solar Technology AG 8 Contact If you have technical problems with our products, please contact the SMA Service Line. The following data is required in order to provide you with the necessary assistance: • Type of system installed (e.g. three-phase single-cluster system) •...
  • Page 53 SMA Solar (Thailand) Co., Ltd. 대한민국 SMA Technology Korea Co., Ltd. กรุ ง เทพฯ 서울 +66 2 670 6999 +82-2-520-2666 South Africa SMA Solar Technology South Africa Argentina SMA South America SPA Pty Ltd. Brasil Santiago de Chile Cape Town Chile +562 2820 2101 08600SUNNY (08600 78669) Perú...
  • Page 54 www.SMA-Solar.com...

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