Operating mode Connection option
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
6 Electrical Connection
SMA Solar Technology AG
Operating Manual 33STP5-12TL-20-BE-en-15
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