Another possibilty-
A voltage regulator is basically a zener diode, if I re,pmember my electronics classes well enough (I probably don't....). If you find an alternator that you can remove the factory regulator, or possibly an alternator with no factory regulator, you could basically make your own VR from something like this. This would be the 30 volt version, pretty close to what you'd need. I've got to think a 48v wouldn't be far off. Otherwise, aren't some golf carts and such 48v? Possibly run the charger off an alternator's AC power and let the charger convert the voltage?
Gems Single Channel Zener Barrier Shunt Diode 113000 250V 30VDC 330 ? Ohms New | eBay
A voltage regulator is basically a zener diode, if I re,pmember my electronics classes well enough (I probably don't....). If you find an alternator that you can remove the factory regulator, or possibly an alternator with no factory regulator, you could basically make your own VR from something like this. This would be the 30 volt version, pretty close to what you'd need. I've got to think a 48v wouldn't be far off. Otherwise, aren't some golf carts and such 48v? Possibly run the charger off an alternator's AC power and let the charger convert the voltage?
Gems Single Channel Zener Barrier Shunt Diode 113000 250V 30VDC 330 ? Ohms New | eBay
