1,200W Power Inverter with 90% Efficiency, Used for Trailers and Mobile Homes OEM & Customization are ... x 6, standard auto blade fuse (external) Efficiency: 85 to 90% Thermal shutdown: 65 +/-5 Deg.C Cooling fan: yes auto ... serve customer with final product 1,200W Power Inverter with 90% Efficiency, Used for Trailers and Mobile Homes