It's more or less a 12 volt system, but it's AC not DC. Also, if I remember correctly, the lighting coils only put out 35 Watts, which is what the stock headlight uses. Adding a tail light will mean you need more power. I'm in the process of adding a regulator/rectifier and 12v 4AH Gel battery to mine. That way the coils in the motor will charge the battery while the lights are off and the battery will provide a steady DC current to keep all my lights nice and bright no matter how low my RPMs are..:thumbsup: