WirthCo 23122 Battery Doctor 12V 10 Amp Solar Regulator Maintains and regulates 12 Volt batteries from overcharging and discharging and keeps them in a fully charged state Provides maintenance-free protection of your solar panel and batteries Handles up to 10 amperes/120 watts of array current Small, compact and easy to mount For use with gel-cell, AGM, deep cycle and all lead-acid 12 Volt batteries