Magnum MMS1012, 1000 Watt 12 Volt DC Pure Sine Wave Inverter/ChargerCondition:* New Surplus Stock, No OEM Packaging. As Pictured.. Additional Notes:* Uses less energy from a generator than a standard charger .5 Amps per 50 Amps versus 12.5 Amps used by standard chargers* The MMS Series is ETL Listed to the stringent requirements of UL/cUL 458 and CSA C22.2 #107.1-01 for mobile use.* The standard 20 Amp transfer relay will pass AC power through the inverter when using shore or generator power.* If your battery voltage reaches below 10 Volt DC or above 15.5 Volt DC, the MMS Series will automatically shut down.Magnum MMS1012