Instapark&reg; MPPT-2010 12V/24V 20 Amp Solar Power Charge Controller, 240W/480W MPPT (Maximum Power Point Tracking) technology maximizes solar panels efficiency for any given weather condition and protects battery from over-charging and excessive discharging. 4-LED battery status LED indicator Suitable for both sealed and flooded lead-acid batteries & automatic voltage detection, 12 volts or 24 volts Maximum 20 amp under load, compatible with Instapark&#0153; solar panels and many other manufacturers CE & RoHS Certified with a standard 2-year manufacturers warranty