A solar inverter converts DC power (Direct current) from the panels into AC power (alternating current) for your home or business.
A battery inverter converts DC power from the batteries into AC power for your home or business and converts AC power from the home or business (from your solar power system and the grid) to DC power so that it can be stored in the battery.
Batteries can only store energy in DC power form. Therefore the battery inverter will continually be converting the power both ways, depending on your consumption and storage. Battery inverters are engineered to suit a specific metering device.
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