My particular setup has space for 2 more panels and then I’m done.
My conclusions is this:
- There is limited to no evidence of vertical turbines doing anything meaningful. Theoretically they cannot ever be as efficient as horizontal ones anyway.
- Vertical turbines are quiet, and horizontal ones less so.
- Not sure if horizontal ones can fit inside 1m which is a by law in Cape Town at least.
Thus wind is not an option in dense areas where the noise from a horizontal turbine might cause issues. I think it may be great and relatively good as add on where wind is present (and clouds are an issue), and there is no noise issues (see the ~$450 mentioned by heavy accent guy above). I would of course start with solar in SA.