SMA SUNNY ISLAND 6048-US - Page 57

SMA America, LLC 6 Electrical Connection
Technical description SI4548_6048-US-TB_en-13 57
Power Contactor for Load Shedding
The Sunny Island can automatically disconnect loads to protect the battery from deep discharge.
To do this, an external (AC or DC) power contactor must be installed between the Sunny Island and
the loads (see Section 12.1 "Load Shedding", page 102).
Installing the power supply of a DC power contactor for load shedding (e.g. relay2):
1. Wire the A1 coil connector of the power contactor to the terminal NO (relay2).
2. Wire terminal C (Relay2) to the terminal "BatVtgOut +".
3. Wire the A2 coil connector of the power contactor with the "BatVtgOut-" terminal.
☑ The control circuit of the power contactor is installed.
Power supply of the DC power contactor
A 48 V voltage is present in the battery-supplied control circuit.
• Load the BatVtgOut terminals with a maximum 0.75 A.