The SP-EN40W SP-EN100W-24 and SP-EN200W are suitable for Charging 24V Battery System when using a PWM Controller. For Charging a 12V Battery System a MPPT Solar Controller MUST be used. Features Enerdrive solar panels are typically around 20+vdc open circuit and are well suited to 12v installations (or 24v by series connections of panels). Enerdrive has a range of Mono...