The ProStar 30 mid-range solar controller for both professional and consumer applications. Longer battery life, and constant voltage PWM series regulation using a 4-stage charging algorithm. With built-in temperature compensation and adjustable setpoints for 3 battery types (flooded, AGM and gels). Includes three battery level LED indicators. Extensive electronic protections to avoid use of mechanical fuses. Electronic protection for short-circuit, overload,reverse polarity, high voltage and temperature, and reverse current at night.