Hardwired inverter is designed to invert 12 VDC to 120 VAC. It is 87 to 92% efficient. Measures 7.9 inch height x 11.5 inch width x 13.2 inch length. It has 2500 Watt output rating and 7500 Watt surge rating. Features over voltage and under voltage protection, over-temperature protection, overload protection and short circuit protection. Includes transfer switch and battery temperature sensor.