Instapark PRS Series PWM 12V/24V Solar Power Charge Controller (10A) PWM (Pulse Width Modulation) technology with temperature compensation protects battery from over-charging and excessive discharging. 4-LED Battery charge status LED indicators Suitable for both sealed and flooded lead-acid batteries & automatic voltage detection, 12 volts or 24 volts. Maximum 30 amp under load, compatible with Instapark&#0153; solar panels and many other manufacturers CE & RoHS Certified with a standard 2-year manufacturers warranty