RioRand (TM) MPPT RR2210RN Solar Charge Controller Regulator 12/24V INPUT 20A 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; The entire I-V curve; 4- Stage charge with MPPT output; Temperature compensation function? Temperatures up to 45 degree; Sealed, Gel, Flooded battery type optional; Dusk to dawn,1-15h timer Diversified load control: Manual, Dusk to Dawn, Dual timer, TEST;