Hi Cecilh. I installed a 5kw Revov battery(said to be the best) and a growatt inverter. I can only use the lights plugs tv and fridges. No oven washing machine or tumble dryer or geyer0. That is with load shedding. When power is restored your appliances will work normal with escom power. But 3.5kw is not enough to power your whole house. And when the battery goes dead three times(totally empty) you can throw it away R29 000.00. Even if it has a 10year gaurentee.So be careful when you go on holiday and the battery runs down. Or any other time.