Charges, maintains and regulates 12 volt batteries from overcharging and discharging. LED indicators show four levels of charging status. Easily mounted. Handles up to 30 Amps of array current and up to 500 watts of solar power. Continuously displays the charging current or battery voltage on the LCD digital meter. Automatically indicates the charged condition of your battery on the LED bar graph. For use with gel-cell and lead-acid 12 volt batteries.