ok re the test, the information should be in the user manual anyway. Loweringthe tower could result in more stress on the turbine, due to greater air turbulence near the ground, but vertical axis turbines aren't as badly affected as horizontal. It should be ok, assuming the contruction quality is good.
Re the friction brake, it is probably best to use it to stop the turbine in very high winds, as it is likely to get very hot in sustained high wind.
By conductor, I was referring to the Copper, which is surrounded by insulation, rather than the overall diameter of wire including insulation. If you can measure the diameter, cross sectional area is easily calculated. I would expect it should be 6mm^2 or more in X-sectional area.
When you say low and high voltage of 24 and 28.8V respectively, do you mean for low and high voltage disconnect? What are your absorb and float voltage set at, and absorb time or end amps?
24V in the morning with no load suggests you are discharging the battery quite deeply, which will result in a much shorter life than you might expect.
What format is the controller file in?
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