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Connect the blue strand from the grey cable of the battery controller to the A2 contacts of the
two relays (Figure 33).
Relay 1
Relay 2
Figure 33: SG Ready relays in the main connection area
Connect the yellow strand from the grey cable of the battery controller to the A1 contact
relay.
Connect the green strand in from grey cable of the battery controller to the A1 contact relay
2.
Most heat pumps require one normally open contact. The normally open contact is therefore
connected to terminals 1 and 2 of the two SG Ready relays.
Connect the heat pump controller cable to the contacts of the SG Ready relays (see heat
pump installation instruction).
Practical tip
Alternatively, one binary input of the Hager radio input, 2gang TRB302B, can be connect-
ed to each of the normally open contacts of the SG Ready relays to send the SG Ready
signals to the heat pump. The heat pump can be fitted with 2 radio switch actuators with
potential-free contact TRM694G whose contacts follow the SG Ready relays. The radio com-
ponents should not be installed outside the metal cabinets in separate housings due to the
radio signal transmission.
hager.com
Subject to technical changes
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Energy storage system
