DC-coupled battery backup
Zeke Yewdall
This unique DC-coupled system splits the PV array to feed a battery backup system and a grid-tied-only system. An OutBack battery-based inverter (upper left box) is connected to four 12 V AGM batteries (lower left box) that provide 5 kWh of storage; a Xantrex grid-tied-only inverter is mounted to the right. This solution can be less costly than having battery backup for the entire array.