The GEESYS power system is an inverter but also contains a powerful smart charger. It is an extremely good choice for utility back up power, provide a pure sine wave power to all equipments. However, it also can be used as a UPS for computers.An inverter, charger and switching box can be replaced with a single Home series unit These are for essentially computer type loads where the back up required may be 30 min to four hours. As a major Sine Wave UPS manufacturer, the capacities available with us are 500VA(12V),and 3kVA(48V).