SMA Solar Technology AG | Sonnenallee 1 | 34266 Niestetal | GermanyPhone: +49 561 9522-0 | Fax: +49 561 9522-100 | Internet: www.SMA.de | Email: info@SMA.deAmtsgericht Kassel (District court) Kassel HRB (registration number) 3972 Vorsitzender des Aufsichtsrats (Chairman of the Supervisory Board): Dr. Erik Ehrentraut Managing Board: Ulrich Hadding, Dr.-Ing. Jürgen Reinert, Pierre-Pascal Urbon

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Manufacturer’s Declaration

VDE application guide 2510-2 Stationary electrical energy storage systems for connec-tion to the low-voltage grid

SMA Solar Technology AG hereby confirms that the Sunny Island energy storage system meets the requirements of VDE-AR 2510-2.

Niestetal, 2017-10-04SMA Solar Technology AG

ppa. Dr.-Ing. Johannes KneipEVP Development Center

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1. Energy storage system with a maximum of three Sunny Island inverters

The energy storage system for increased self-consumption is made up of the following components:• Sunny Island 4.4M/6.0H/8.0H• SMA Energy Meter• Battery (all lead-acid batteries and approved lithium-ion batteries (see www.SMA-Solar.com))

The energy storage system for increased self-consumption with battery-backup function is made up of the following components:• Sunny Island 4.4M/6.0H/8.0H• SMA Energy Meter• Battery (all lead-acid batteries and approved lithium-ion batteries (see www.SMA-Solar.com))• Automatic transfer switching device from enwitec electronic GmbH & Co.KG

(Type: 1PH_IPC_SMA_BBDAP_20kW_X_X and 3PH_SMA_BBDAP_35kW_X_X)

The energy storage system for forming a battery-backup grid is made up of the following components:• Sunny Island 4.4M/6.0H/8.0H• Battery (all lead-acid batteries and approved lithium-ion batteries (see www.SMA-Solar.com))• Automatic transfer switching device from enwitec electronic GmbH & Co.KG

(Type: 1PH_IPC_SMA_BBDAP_20kW_X_X and 3PH_SMA_BBDAP_35kW_X_X)

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Changing the number of reconnection attempts

To comply with the functionalities stipulated for grid backup operation in Appendix A.1, the parameter "Maximum number of start attempts after a fault" must be set to 0 via the user interface of the Sunny Island 4.4M/6.0H/8.0H. Concerning this, please refer to the operating manual for the Sunny Island 4.4M/6.0H/8.0H at www.SMA-Solar.com.

Information on VDE-AR 2510-2 Appendix A Functionalities for grid backup operation

A.1 Provision of short-circuit current

– Maximum possible short-circuit current: Sunny Island 4.4M: 60 A (root-mean-square value over a grid period) Sunny Island 6.0H/8.0H: 120 A (root-mean-square value over a grid period)– Maximum short-circuit current profile:

Figure 1: Maximum short-circuit current profile for Sunny Island 4.4M

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Figure 2: Maximum short-circuit current profile for Sunny Island 6.0H/8.0H

– Indication of reconnection attempts: 0

A.2 Voltage limitation

– Voltage profile against ground potential in the event of a short-circuit:

Figure 3: Maximum impedance voltage for Sunny Island 4.4M

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Figure 4: Maximum impedance voltage for Sunny Island 6.0H/8.0H

– Indication of whether reconnection is manual or automatic after disconnection in the event of a short circuit: manual– For automatic reconnection: not applicable

A.3 Grounding of the stand-alone grid

For the characterization of the stand-alone grid forming storage system, the following information must be provided: – Representation (simplified diagram, schematic diagram) of the grounding of the stand-alone grid:

Figure 5: schematic diagram for the automatic transfer switching device

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Figure 6: Circuitry overview

– Indication of the measure for compliance with fail-safe operation (monitoring, redundant electronic circuit, etc.): Redundant – Transient ampacity of the grounding of the stand-alone grid for 5 s: 240 A – Permanent ampacity of the grounding of the stand-alone grid: 40 A

A.4 Disconnection in the IT network after the first fault

Not applicable

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2. Energy storage system with more than three Sunny Island inverters

The energy storage system for increased self-consumption with battery-backup function is made up of the following components:• Sunny Island 6.0H/8.0H (in each case, three Sunny Island inverters form a three-phase subsystem (cluster)) • Battery (all lead-acid batteries and approved lithium-ion batteries (see www.SMA-Solar.com))• MC-BOX-12.3-20 (connection of up to 12 x 6.0H/8.0H; 4 clusters, each with 3 Sunny Island inverters) • NA-BOX-12.3-20

Changing the number of reconnection attempts

To comply with the functionalities stipulated for grid backup operation in Appendix A.1, the parameter "Maximum number of start attempts after a fault" must be set to 0 via the user interface of the Sunny Island 4.4M/6.0H/8.0H. Concerning this, please refer to the operating manual for the Sunny Island 4.4M/6.0H/8.0H at www.SMA-Solar.com.

Information on VDE-AR 2510-2 Appendix A Functionalities for grid backup operation

A.1 Provision of short-circuit current

– Maximum possible short-circuit current: Four Sunny Island 6.0H/8.0H inverters: 480 A (root-mean-square value over a grid period)– Maximum short-circuit current profile:

Figure 7: Maximum short-circuit current profile with four Sunny Island 6.0H/8.0H inverters in one phase

– Indication of reconnection attempts: 0

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A.2 Voltage limitation

– Voltage profile against ground potential in the event of a short-circuit:

Figure 8: Maximum impedance voltage of four Sunny Island 6.0H/8.0H inverters in one phase

– Indication of whether reconnection is manual or automatic after disconnection in the event of a short circuit: auto-matic

– Voltage profile in the event of a short circuit upon restart following a short circuit:

Figure 9: Maximum impedance voltage of four Sunny Island 6.0H/8.0H inverters in one phase after a restart

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A.3 Grounding of the stand-alone grid

For the characterization of the stand-alone grid forming storage system, the following information must be provided: - Representation of the grounding of the stand-alone grid (extract):

Figure 10: Extract from a schematic diagram of the grounding of the stand-alone grid

– Indication of the measure for compliance with fail-safe operation (monitoring, redundant electronic circuit, etc.): Monitoring– Transient ampacity of the grounding of the stand-alone grid for 5 s (in A): > 600 A– Permanent ampacity of the grounding of the stand-alone grid: 100 A

A.4 Disconnection in the IT network after the first fault

Not applicable