You will need a charge controller to be able to use the power generated by your wind turbine.
Since, it seems like lots of people are confused by the charge controller, we’ll give a short and to the point explanation about what it is, and where it comes into play with the system as a whole.
What a charge controller is and why you need one
Picture your wind turbine spinning away producing watt after watt of electricity to the battery bank, sounds great right. Not so fast, if you don’t have a charge controller in place, all you will end up with is a bunch of overcharged batteries that will begin to burn out one by one, since they can’t handle being overcharged.
This is the inside of a charge controller for a wind turbine.
Now, lets take a look at what the controller will do to help prevent this from happening.
You now have your wind generator up and have run the wires toward the battery bank, stop right there. You first need to hook those wires into the controller, and then the battery bank.
The charge controller will monitor the amount of power being fed to the batteries and before the batteries ever have a chance to overcharge, the controller will cut the power being fed to the batteries and dump the excess power, thus saving your batteries.
There is one more little part needed between the batteries and the wind generator, and that is a blocking diode (very cheap and easy to install). All a blocking diode will do is keep the batteries from sending the power back to the wind turbine causing the motor to turn.
This is a blocking diode for a wind generator.
That is really all there is to a charge controller and a blocking diode.
If your still not quite comfortable don’t worry too much since all this is covered in a quality set of plans.