The Sofar HYD-ES 6KW lnverter has multiple modes of use to suit your needs. Auto mode will enable you to charge your battery with your surplus PV energy and it will use stored energy from the battery to power your load when the PV energy supply is too low.Should the grid go down , like, during load shedding, the Sofar inverter will work in EPS (Emergency Power Supply) mode which will keep the supply to your appliances flowing.