DC Battery Life Calc Free

Earth Gaming

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About this app

This is a simple tool to help calculate the estimated run-time* of your battery or battery bank under a given load. By entering the Rated Battery Capacity, measured in amp hours (symbol: Ah) and applied load i.e. Discharge Rate, measured in amperage or amps for short (symbol: A), you can calculate the Actual Battery Capacity at that load plus how much time it takes to discharge to the batteries to safe levels 25% - 50%, (green and yellow) and to the levels at which you may be damaging the battery (orange, red, deep red).

The calculator also takes into consideration PEUKERT'S Law.
If you happen to have the manufacturers Peukerts Number then you can enter it.
Otherwise it's set to 1.1

For a lead–acid battery, the value of is typically between 1.1 and 1.3.
For VRSLAB AGM batteries, it generally ranges from 1.05 to 1.15.
For GEL batteries from 1.1 to 1.25.
For Flooded batteries commonly known as sealed batteries, 1.2 to 1.6.

* Due to factors such as age, make and temperature please note that run-times are estimates.

Ratings and reviews

Works great, except it doesn't work. For instance my boat's propulsion bank of 8 6v 220ah golf cart batteries with a peukert exponent of 1.125 would give me a 50% SOC after 10hrs at the peukert neutral discharge current of 11a. This is borne out by my actual observations as well as the actual 20hr discharge rating of the batteries as stated by the maker. App says I only get 7.41 hours at 11a for a 50% SOC. Tried higher and lower rates. All wrong wrong wrong.

Handy little app for calculating estimated battery life for a given amp draw. Great if you are setting up a solar grid or have an electric vehicle that runs off of good 'ol lead batteries.

Calculations are retarded and have to hit home button to close

What's new

- Fixed icon.