The important question is "How long can I run an UPS or an inverter on my battery bank?"

Three important values are:

1. The voltage of the battery bank.

2. The total Amps/H of the battery bank.

3. The combined Watt of your appliances.

Just enter the values below, click CALCULATE and the calculator gives you your answer.

Battery run time




Enter the voltage of your battery: V

Enter the total Amp/Hrs of the battery: Amp/H

Enter the combined Watt value: Watt