RioRand (TM) MPPT RR3215RN 0A 12V 24V EP Solar Charge Controller RioRand MPPT technology; Excellent thermal design and nature air cooling; CE certificate; Peak conversion efficiency of 97 %; High Tracking efficiency of 99%; Several seconds tracking speed; Very fast Sweeping of the entire I-V curve; 4- Stage charge with PWM output; Temperature compensation function Full power output in ambient temperatures up to 45 degree; Sealed, Gel, Flooded battery type optional; ON/OFF, Dusk to dawn, 1-15h timer Diversified load control: Manual, Dusk to Dawn, Dual timer, TEST;