From SustainableX.com
True Sinewave Inverters produce the same or better energy than a grid power supply. They convert your battery power to a more useable high quality AC mains electricity and create your own independent mains supply for your boat, caravan, motorhome or remote area power system. They are also suitable to power a wide range of every day appliances and increases the lifespan of your TVs, VCRs, stereo, computers, lights, fridges, ovens and other sensitive electrical devices. Simply connect a suitable 12/24 volts battery to the inverter. Other models have a feature of Automatic AC Transfer as an option to eliminate the need to manually switch your power source between inverter and generation. It automatically senses generator and inverter accordingly.