Installation Manual

Backup Power Only - System Configurations
23
► To verify communication:
Verify SolarEdge inverter communication as described in the Basic Configuration on page 21.
Additional Capacity with Two Batteries
For sites where additional battery capacity is needed (for example, to enable backed-up loads to be powered from the batteries
for longer periods), two batteries may be connected to a single StorEdge Inverter.
In this configuration, only one battery operates at any given time – i.e. the two batteries provide additional capacity only, not
additional power.
The DC connection of the two batteries to the StorEdge Inverter is done in parallel through an external fused combiner box (not
provided by SolarEdge), with a fuse rating of 12A/600V.
The control and thermal connection of the second battery is daisy chained to that of the first battery.
Figure 18: Backup Power Only - Additional capacity with two batteries
► Configure the System:
1 Terminate the battery which is connected last on the RS485 bus (battery 2), and make sure the other battery (battery 1) is
not terminated:
Battery 1 - Unterminated battery:
Battery 2 - Terminated battery: