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Battery Runtime Calculator

Complete the following input data to calculate runtime based on load and known battery rating.

The Battery Size selector table provides part numbers for several popular battery sizes from different manufacturers. Runtime is based on published manufacturer data. Using batteries of similar rating from other manufacturers should provide similar results.

Kw Load:   

Inv Eff %:   

Number Of Batt In String:          

Number Of Parallel Batt Strings:

Battery Size:  


Battery Runtime = 
   Minutes

Battery Power =       Watts Per Battery

Battery Power =       Watts Per Cell

Battery Current =    Amps


*Battery runtime calculation assumes 1.67 volts/cell cutoff
*Actual battery performance may vary from calculated values due to age and condition of the battery, operating temperature and other factors

Battery Size Calculator

Complete the following input data to calculate the required battery size to achieve the desired runtime

Kw Load:   

Inv Eff %:   

Number Of Batt In String:          

Number Of Parallel Batt Strings:

Desired Runtime Minutes:          



Battery Rating =    Watts

Battery Power =    Watts Per Battery

Battery Power =    Watts Per Cell

Battery Current =  Amps



*Battery size calculation assumes 1.67 volts / cell cutoff
*Actual battery performance may vary from calculated values due to condition of the battery, operating temperature, and other factors