3 Functions and Design
SMA Solar Technology AG
System DescriptionSI44M-80H-13-MC-IA-en-1020
The GridConnectBox disconnects the system with increased self-consumption and battery-backup function from the
utility grid during grid failure. The loads are supplied with power via the battery-backup grid without interruption. The
PV system can synchronize with the system with increased self-consumption and battery-backup function and feed in.
When the utility grid is available again, the system with increased self-consumption and battery-backup function
synchronizes with the utility grid. Following successful synchronization, the GridConnectBox connects the system with
increased self-consumption and battery-backup function to the utility grid.
3.4.2 Requirements of VDE Application Guide 2510-2
The requirements below apply only for systems for which the following properties are all applicable:
• The system is a system with increased self-consumption (SMAFlexibleStorageSystem) or a system with increased
self-consumption and battery-backup function (battery-backup system).
• The grid operator or the locally applicable standards and guidelines require compliance with the above-
mentioned Application Guide.
Currently, only the grid operators in Germany require compliance with the above-mentioned Application Guide.
In accordance with the scope of VDE application guide 2510-2, a manufacturer's system is regarded as a complete
energy storage system only if products are used that have been approved by the manufacturer (see the technical
information “List of Approved Batteries” at www.SMA-Solar.com). If products are used that have not been approved
by SMASolarTechnologyAG, the installer is deemed to be the manufacturer of the system.
The requirements of VDE application guide 2510-2 are fulfilled if the installation is carried out in the accordance with
the technical documentation of the battery inverter.
3.4.3 Requirements for Systems with Increased Self-Consumption and Battery-
Backup Function
Utility grid connection via Grid-Connect-Box
The Grid-Connect-Box may be used only in areas where VDE-AR-N4105 application guide does not apply.
The Grid-Connect-Box is always delivered with all-pole disconnection. If, during a grid failure, the technical
connection requirements of the grid operator or the locally applicable standards and directives prohibit
disconnection of the neutral conductor, you must deactivate the all-pole disconnection in the Grid-Connect-Box
(see operating manual of the Grid-Connect-Box).
Electricity supply of communication devices
During a grid failure, only the devices in the battery-backup grid are supplied with current.
• Connect the electricity supply of communication devices to the battery-backup grid.
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