Tracer 3215RN 30A 12/24V MPPT Solar Charge Controller. Includes 2-year manufacturer's warranty. Finally, a high quality true MPPT charge controller Image Unavailable. Image not available for. Color: MPPT TRACER 3215RN Solar Charge Controller 30A 12V 24V EP. Roll over image to zoom in. Tracer. Professional MPPT controller is used to control the flow of energy from the solar panels or power source to batteries and appliances. DC Voltage: 12 / 24 V Array. (Isc) of the solar array should be less than 20A (Tracer-2210RN) or 40A The MPPT Charge Controller charging process has been optimized for long 12V / 24V auto recognition. Ex. 30A MPPT CC = 30A fuse from Controller to Battery.