 Something to keep in mind
I am not an expert in wind power by any means. I am working on a small wind generator for my houseboat. 3' blades.
I am going to assume for this discussion that you are not doing net metering with this small turbine. Because the costs of setting up the disconnect and other requirements needed for net metering would put this way out of range.
Yes, you will need a charge controller (a charge controller is needed on ANY power system that recharges batteries, of any size) so that your batteries are not overcharged and burned out prematurley.
Here's where the major difference between solar generation and wind generation comes in. Most charge controllers simply shut off the power going to the batteries. Which is fine in a solar system. Any excess energy can be disapated as heat from the solar panel. No harm no foul.
In a wind generated system when the batteries are full and your charge controller turns the current off to the batteries, that power has to go somewhere.
If you do not have a directional diode in your line (I hope you have included a directional blocking diode, so that when the wind is not blowing it will not suck your batteries dry to turn your turbine). These diodes need to be in any type self generation system.
If you do not have a diode the energy will feed back to the turbine and turn it faster and faster until it burns the generator out. If you do have a diode it will generate as heat in your charge controller, until it burns it out.
Sorry, back on target. You will need to put a relay in at the charge controller and a dump load. This dump load (depending on the output of the turbine) can be anything from a light bulb to high energy heat sinks.
For my project I am putting a heat sink in the belly of my boat, I intend to use the extra heat to cut down on my energy consumption through the winter months. I'll figure something different out by summer for the dump load.
I am documenting the project as we work on it. Once completed I will post the documentation on my website.
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