PVVO is a voltage optimisation unit that matches your voltage supply to the equipment you are using -saving you both money and energy! Most homes are supplied electricity between 241-253v, even though the most efficient way to operate voltage is between 220-230v. Without the PVVO system, most homes will be supplying excess voltage to appliances which causes your appliances to consume unnecessary energy. This not only costs you more money, but also shortens your appliance or devices life!