Note: This calculator doesn't function in some browsers. Works fine in IE.

To determine the approximate power drain on your battery you will want to estimate the reserve power (amp/hour) and the amps the inverter will require to meet the continuous load demands of the appliance.

Battery Capacity

choose your battery voltage and

enter amps/hrs of your battery and wattage of your appliance.

battery

amp/hrs

total hrs

  

or

  

   wattage

total min: