How fast can a CEP mini wind turbine charge my battery?

How fast can a CEP mini wind turbine charge my battery?

This is a very difficult question to answer because every wind turbine installation (even mini turbine installations) has so many variables.

It really comes down to 2 major things to calculate battery charge times: wind speed and the size of the battery.

Here is an example:


  • 15W max Cutting Edge Power mini wind turbine with 12.5" high performance blade.
  • No wind-blocking structures around, such as trees, buildings, etc.
  • 12V lead acid battery at 80% charge.

Assuming you have a lot of wind and the mini turbine is generating about 10W of power, this would be equivalent to 0.8 amps (when charging at 12.5V). 

The math: 10W ÷ 12.5V = 0.8A

One hour of this charging would be considered 0.8 amp-hours.  If you have a 100 amp-hour battery that is at 80%, you could charge it to 100% in about 24 hours of these conditions.  Our cyclone turbine would double the power output because it has a larger, 33W max, generator.

The math: 100% full charge - 80% charge = 20% charge needed

20% x 100 amp hours = 20 amp hours needed

20 amp hours ÷ 0.8 amp hours = 25 hours

If you're having trouble with charge times, or charge voltages, we strongly recommend you measure your wind speed with an anemometer.  Many times when you use a weather app to report wind speeds it ends up being inaccurate.  This is because the weather app's anemometer is 30-50 feet high at the top of a weather station, with no buildings or trees in sight.  Measuring the wind speed yourself takes a lot of the guesswork out of it.

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