Are you looking to learn the basics of solar technology or perhaps get up to speed on Federal Tax Incentives for renewable energy? These links may be your source for helpful reading.
Charge Controller Sizing – PWM and MPPT
PWM Charge Controller Sizing Solar panels that are the same “nominal” voltage of your battery bank use PWM style charge controllers since the input voltage is close enough to that of your battery bank to allow proper charging without overcharging the cells. The short method for sizing a PWM style charge controller is to take