If you're looking for a complete solution, there are a decent number of small wind turbines designed for charging 12v batteries (car batteries) on yachts.
Here's the 1st company I found on google. I can't personally vouch for the product, but it should give you an idea of what's available.
https://www.leadingedgepower.com/le-450-wind-turbine-12-24-4...
Does anyone know what kind of generator setup you should get for charging a car battery? A link would be helpful. If used car generator is ok, how to get one from aftermarket?
The video is awesome, how it is made?