How to calculate battery run time. How long will my battery run this is a big question for many end users and even for some electronics engineer. The key is to use the watts you know to calculate the amps at the battery voltage. Next determine the power output.
We here come with a simple battery time calculator that will tell you how long your battery will run. Watt hours watts hours 250 watts 5 hours 1250 watt hours. Inefficiency caused by the peukert effect reduces the discharge time.
Watt hours watts hours 250 watts 5 hours 1250 watt hours. The key is to use the watts you know to calculate the amps at the battery voltage. This is the total energy storage the battery can hold in amp hours.
For example say you want to run a 250 watt 110vac light bulb from an inverter for 5 hours. This power output is also know as the usage rate and is measure in watts. Note that there are battery run time calculators on the web that are very wrong.
Actually watts is the fundamental unit of power and watt hours is the energy stored. Battery life battery capacity in mah load current in ma. For example say you want to run a 250 watt 110vac light bulb from an inverter for 5 hours.
We recommend recharging after four hours in these particular circumstances. That page teaches how to take into account battery lifetime peukart effect and end of life matters. We will say 50 watts for this.
Battery run time calculator. First determine the battery capacity. For this example we will say that value is.
Using our formula the calculation is 10 x 60 100 6 hours maximum run time. Actually watts is the fundamental unit of power and watt hours is the energy stored.
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