Magnum Energy MS2812 MS Series 2800 Watt, 12V Inverter/125 Amp PFC Charger, Input battery voltage range 9 - 17 VDC, Nominal AC output voltage 120 VAC, Output frequency and accuracy 60 Hz +/- 0.04%, Rated input battery current 267 ADC, Inverter efficiency (peak) 88%, Transfer time 16 msecs, No load (120 VAC output) 30 watts (MS-2812 MS 2812)