I am interested in building a waterwheel generator capable of powering a typical home. My plan is to use a waterwheel to turn one or more DC motors to generate the power and power inverters to get usable power for home appliances. I am guessing I will probably need 2-4 kW. Because I have constant power being generated I have no need for batteries as with the standard solar panel setup and would like to avoid the cost of the batteries as well as maintenance associated with them thus the need for high currents being generated constantly with out regard to the load. My problem is what to do with the extra power. My initial thought is to bleed it off to ground but need a way to sense the load changes and switch the extra power to ground.