Sunforce solar panels are a great way to save money and the environment. Sunforce solar products provide a clean source of energy, by controlling energy from the sun and converting it to usable power! You can save hundred's on your electricity bill while reducing your carbon footprint when you use a Sunforce solar panel and charge controller. A Solar Charge controller regulates the voltage and current or amperage coming from the solar panels going to the battery and prevents the solar panel from overcharging 12V batteries. It also prevents reverse currents to panels during the night and regulates the voltage that comes from the solar panel which can vary with the sun conditions.