... 1,long life 2,high quality 3,competitive price 2011 NEW DC to AC power inverter,300W Inverter Detailed Product Description ... load shutdown,,output short shutdown,input polarity reverse shutdown 1 year warranty Specification Item No. SPI-300M12SPI-300M24OutputAC Voltage100/110/120VAC ... condition is removed.Input Polarity ReverseFuse burnt,replace with a new fuse.