I can understand using the wind power to run things at night. We do that with our solar when the sun shines. That leaves us with a limitation though. Our banks can't handle the big loads like the microwave without the solar boost. So when it is cloudy we either don't use the big items or need the generator.
So if you are going to NEED the wind power to make it through the night, you are going to run out of power when it is calm. I agree with more battery and let the solar recharge it during the day. Adding wind power may be beneficial but I wouldn't depend on it.