We recommend this backup power supply for its flexible use and back up points with ISP providers or back up power for pumps and the like where pure sine wave output is needed. Thanks to the connection of large batteries, the source is ideal for long-term backup.
When powered from the mains, the connected appliances are powered directly from the mains, the external accumulator is recharged, when the mains fails, the source automatically switches to the voltage converter, energy is taken from the accumulator, the appliances are powered from the converter. After restoring electricity energy source automatically switches to the mains, the battery starts charging.