The SMA Sunny Backup 2.2kW from Critical Power Supplies.

Reliable back-up electricity supply for family homes

Innovative power backup for private homes: as an add-on to a PV plant, the Sunny Backup Set S switches automatically to off-grid mode within 50 milliseconds in the event of grid failure. Whether in summer or winter: owners of small to mid-sized SMA PV plants and inverters can supply their most important consumer loads themselves in case of a blackout. Our affordable complete solution is suitable for both new solar electricity systems as well as existing PV systems, which can be easily retrofitted with our certified Sunny Backup Set S.