... 50Hz/60Hz 5.high quality 400w DC AC Inverter 12V/24V to 220V Power Inverter 1. Efficiency:>85%2 ... people on the power off situation.Can be used in many occasion, such as in cars,in trucks,at boat,with solar system, ... .150W:laptop, PDAS , 8" TV, Halogen light buld, CD , Mini stereo ,etc.300W: 20TV ,VCR Combo ,computer ,printer ,Fax ,etc ... ? 400W dc to ac inverter 12/24V to 220V used in car and house.ect