In the event of a power loss, it provides backup power. When battery power is required, the system switches to battery power automatically. When switching to batteries, electronics remain turned on. Lead-acid solar batteries with a pure sine wave inverter. Solar charging controller built-in. Off-grid capability (with no mains connection). Intelligent charger for batteries. AC mains and generator electricity are both compatible. While the air conditioner is recharging, it will automatically restart. The unit is on wheels for convenient transport. Overload, short-circuit, over-temperature, and over-current are only a few of the precautions available.