SMA SUNNY ISLAND 6.0H - Page 5

1 Information on this Document
SMA Solar Technology AG
Quick Reference Guide 5SI44M-60H-80H-12-IS-xx-12
Symbol Explanation Symbol Explanation
Battery PV array
Lead-acid battery Existing protective devices (e.g. in the
SMAFlexibleStorageSystem)
Lithium-ion battery AC loads
Utility grid Generator
SMAEnergyMeter Existing house distribution board with
protective devices (e.g. in the battery-
backup system)
Off-grid system Grid-connection point with energy me-
ter of electric utility company
Battery-backup system SMAFlexibleStorageSystem
Grid disconnection Grid disconnection with all-pole discon-
nection
Grounding device Grid disconnection without all-pole dis-
connection
1.5 Explanation of Used Terms
Term Explanation
Off-grid system Off-grid systems are self-sufficient utility grids. The SunnyIsland forms the stand-alone grid
and regulates the balance between the energy that is fed in and the energy that is used.
Battery-backup sys-
tem
In the event of grid failure, a battery-backup system supplies loads with energy and a PV sys-
tem disconnected from the utility grid with voltage.
SMAFlexibleStor-
ageSystem
The SunnyIsland uses the connected battery for the intermediate storage of excess PV en-
ergy in the SMAFlexibleStorageSystem.
Grid disconnection The functional group grid disconnection is part of the automatic transfer switch of the battery-
backup system and disconnects the battery-backup grid from the utility grid in the event of
grid failure.
Grounding device In the case of all-pole disconnection, the functional group grounding device is part of the au-
tomatic transfer switch of the battery-backup system and enables protection against indirect
contact with live components.
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