SMA MULTIFUNCTION RELAY - Manual (Page 20)

4 Electrical Connection SMA Solar Technology AG
20 MFR-NR-IA-en-21 Installation Manual
Controlling loads or charging external batteries in a power-dependent way via
the multifunction relay
Loads can be controlled and external batteries charged in a power-dependent way via the
multifunction relay. To enable this function, a contactor (K1) must be connected to the multifunction
relay. The contactor (K1) switches the operating current for the load on or off. If you want external
batteries to be charged depending on the available power, the contactor serves to activate or
deactivate the charging of the batteries.
Figure 7: Wiring diagram for connection to control a load or for the power-dependent charging of the batteries