Power inverter convert DC voltage into conventional AC voltage that you can use to operate all kinds of devices like electric lights, kitchen appliances, microwaves, power tools, TVs, radios, computers, to name just a few. You just connect the inverter to a battery, and plug your AC devices into the inverter ... and you've got portable power ... whenever and wherever you need it. The inverter draws its power from a 12 Volt battery (preferably deep-cycle), or several batteries wired in parallel. The battery needs to be recharge as the power is consume by the inverter. The battery recharged can be by running the automobile motor or a gas generator, solar panels, wind-mills. Or you can use a battery charger plugged into an AC outlet to recharge the battery. Genius™ Genius lightweight, high efficiency 100% solid-state inverters feature low battery alarm, low battery shut down, overload and short circuit protection, thermal protection and a cooling fan. The high surge current capability starts difficult loads such as motors and other inductive loads. All models: 120VAC, 60Hz output. Battery cables included. UL listed, CAS approved and CE certified. 90% efficiency and one year warranty. Models for export voltage also available - 230, 50Hz, 200, 60Hz. Note: Tare loss is less than 1 watt with switch "off".