The load is fed directly from solar with priority and any excess Solar Energy will charge battery & when the Solar Energy generated is less than the Load requirement batteries will be supplying differential Energy When solar is not available, and the batteries are charged - the load is Supplied from EB power if available or from batteries (Priorities can be set as per the Customer Choice) When both Solar and EB power is not available - the load is supplied from battery. Generally these systems are highly suitable for power failure situations and for capacities