From the GA series of LPG and Natural Gas generators, the Pramac GA20000 20kVA 3-Phase is reliability economical thanks to the robust Generac G-Force engine. The Overhead Valve (OHV) engine produces 20kVA / 20 KW of power effortlessly and has been designed for residential backup use. Its best for powering the home where the use of medium to large appliances, heating, lights, and such is required. Plus, it can power sensitive electrical equipment too, using True Power™ Electrical Technology. Its compact size and low sound levels makes it a market leader in LPG and Natural Gas Generators POWER RATING OF THE PRAMAC GA20000 It has Standby power of [ESP] (Liquid Propane) VA 20000 / 20kVA and Standby power of [ESP] (Natural Gas) VA 17000 / 17kVA. Fuel consumption is surprising low at just 4.50 (m3/h) NG and 6.83 (kg/h) LPG @ 50% load. There is an optional 100 Amps Automated Transfer Switch (240V / 400V) to make the GA20000 fully automated. You will need this to ensure the generator starts automatically when there is a power outage (mains failure).