The AIMS Power lithium battery cabinet is designed to work with the AIMS Power hybrid inverters. The powerful lithium batteries installed in the pre-wired cabinet provide power for critical loads, load sharing during night hours, or when grid power is at peak rates. The battery cabinet is charged using solar or when grid power is available. When the battery cabinet is used with an AIMS hybrid inverter, the cabinet can be set to charge when grid rates are low or charged using solar first, then grid if needed. You can also program the hybrid/battery to power loads during peak grid hours. This helps offset your power bill!