I see that the hornet wind generator here
http://www.hydrogenappliances.com/Hornet.html is unregulated and puts a lot more voltage in to a battery than its holding capacity
the 24 volt version the HT 24 puts out 62 volts at 30mph wind speed and 92 volts at 60mph as seen in this chart http://www.geocities.com/eraser1.geo/hornetcharttwo.jpg
how can a 24volt battery pack handle this type of voltage???
the generator does not use a regulator ,they use a regulator on the batterys to dump extra power to a load.