6 Electrical Connection
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 43
6.4.3 Connection Options
The connection procedures vary, depending on the operating mode.
Operating mode Connection option
Fault indication (FltInd)
Using the Multifunction Relay as a Fault Indicator Contact
Self-consumption (SelfC-
smp)
Controlling loads via the multifunction relay or charging batteries de-
pending on the power production of the PV system
Control via communica-
tion (ComCtl)
Controlling loads via the multifunction relay or charging batteries de-
pending on the power production of the PV system
Battery bank (BatCha)
Controlling loads via the multifunction relay or charging batteries de-
pending on the power production of the PV system
Fan control (FanCtl)
Connecting the external fan (see fan documentation)
Switching status grid re-
lay (GriSwCpy)
Reporting the switching status of the grid relay
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