Our 5-45W Automatic Solar Controller allows you to convert an existing solar panel into a solar charger using our smart charging capabilities, which prevent overcharging or discharging your batteries.CAPACITYMax output of 3 ADC and max input voltage of 32 VDC 3-STAGE FUNCTIONBuilt with 3-stage charging; determines battery connection, voltage and charge level to automatically turn the output load on or off based on the selected battery voltage EASY TO USEFeatures a LED battery voltage and status indicator to easily track battery and solar panel status; capable of indicating error status SAFETY FEATURESFeatures protection against reverse connection, overvoltage, short circuit, and over temperature; compatible with 12 volt batteriesCalifornia Residents WARNING: Cancer and Reproductive Harm - P65Warnings.ca.gov