Magnum Energy MS4024 MS Series 4000 Watt, 24V Inverter/105 Amp PFC Charger, Input battery voltage range 18 - 34 VDC, Nominal AC output voltage 120 VAC, Output frequency and accuracy 60 Hz +/- 0.04%, Rated input battery current 204 ADC, Inverter efficiency (peak) 87%, Transfer time 16 msecs, No load (120 VAC output) 25 watts (MS-4024 MS 4024)