This Large household generators cost a LOT of money. They can run off gasoline, diesel or LPG, and usually have a self-starting mode where they kick on when the grid power is interrupted. These can kill electricians who pop a service disconnect and dont know theres also a backup generator. -524 Here the meter shows the turbine producing 13.49 volts. The voltage from the turbine goes up only a little as the wind speed increases once it has a load to power. Once the wind starts blowing, the turbine head snaps around into it and begins spinning up. It spins up quickly until the output voltage exceeds the battery voltage plus the blocking diode drop around 13.2 volts, depending on the state of the battery charge. it is really running without a load until that point. Once the that voltage is exceeded, the turbine suddenly has a load as it begins dumping power into the battery. Once under load, the rpms only slightly increase as the wind speed increases. More wind means more current into the battery which means more load on the generator. So the system is pretty much self-governing. I saw no signs of over-reving. Of course in storm-force winds, all bets are off. Switching the controller to dump power into the dummy load did a good job of braking the turbine and slowing it way down even in stronger gusts. Actually shorting the turbine output is an even better brake. It brings the turbine to a halt right now, even in strong winds. Shorting the output is how I made the turbine safe to raise and lower, so I wouldnt get sliced and diced by the spinning blades. Warning though, the whole head assembly can still swing around and crack you hard on the noggin if the wind changes direction while you are working on these things. So be careful out there. "hydro power for home " and "how to make a solar system diorama " (include "home depot energy tax credit", "home energy score tool ", "home energy audit michigan ", "how windows installer works ", "gas electric cheapest ", "Home energy emergency assistance ", Complete information on solar power systems, alternative energy, free solar panels, diy solar panels, free electricity, renewable energy & How to build a simple windmill )