Our MGM Generators have small, medium and big sizes. Usually small gensets are for house usage or small electrical usage. For housing normally we will recommend 15kVA or 30kVA generator. They are enough to cover your house, unless your house got fish pond pump or swimming pool pump. That might not enough to cover but is ok, because back up genset for house are only to power up the important electrical appliances during black up. Not necessary to power up everything.