GED 20A 12V/24V DC MPPT Solar Charge Controller Tracer A 2210RN Advanced Maximum Power Point Tracking (MPPT) technology allows it to accurately track the maximum power point of PV array to obtain the maximum solar energy at any time, with tracking efficiency over 99.5% PV short circuit, over current, reverse polarity protection, battery over voltage, over discharge, over heating protection, load short circuit and overload protection, controller overheating protection. Multiple safety protections make it one of the safest controller in the market. LCD display shows system information including charging status, battery type, PV voltage and current, load voltage and current, etc.. It is programmable for battery types, load control, etc.. Works with 12V and 24V system, supports sealed, gel and flooded battery. Backed with 18-month warranty from a local US company