Samlex EVO30AB Solar Charge ControllerControl the flow of current from your solar panel to your batteries. Prevents over charging and can extend the life of your batteries. Use as a stand alone charge controller or expand functionality by adding other EVO products. 30 Amp charging capacity 8 charge settings for different batteries Selectable battery equalization option Use with 12 24V batteries EVO RC PLUS Remote Display (Optional) Increased functionality when used with an EVO Series