Installation Guide

6 Electrical Connection
SMA Solar Technology AG
Installation Manual SBxx-1SP-US-41-IA-xx-10 37
Operating mode of multi-
function relay (Mlt.Op-
Mode)
Description
Fan control (FanCtl)
The multifunction relay controls an external fan, depending on the
temperature of the inverter.
Switching status grid re-
lay (GriSwCpy)
The local grid operator may require that a signal is transmitted as
soon as the inverter connects to the utility grid. The multifunction re-
lay can be used to trigger this signal.
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
ENGLISH