1 Information on this Document
SMA Solar Technology AG
Quick Reference Guide
5
SI44M-60H-80H-12-IS-xx-13
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
Grounding device
In the case of all-pole disconnection, the functional group grounding device is
part of the automatic transfer switch of the battery-backup system and enables
protection against indirect contact with live components.
Battery-backup system
In the event of grid failure, a battery-backup system supplies loads with energy
and a PV system disconnected from the utility grid with voltage.
Stand-alone grid
Stand-alone grids are self-sufficient utility grids that are supplied with power from
different energy sources. The Sunny Island forms the stand-alone grid and regu-
lates the balance between the energy that is fed in and the energy that is used.
Off-grid system
All components belonging to the stand-alone grid (e.g., Sunny Island)
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.
Grid disconnection with all-pole
disconnection
In the event of grid failure, a tie switch disconnects all line conductors and the
neutral conductor from the utility grid.
ENGLISH
