IP68 Waterproof Solar Charge Controller 1,Stree light solar controller 2,1 year warranty 3,PWM Control KM-5A, 10A, 15A,20A,30A light ... the first work period set 0h (h), the controller finds that the second and third periods of work are 0h (h). This ... diode circuit to reduce nearly half of fuzzy control using PWM charge, a substantial increase the charging efficiency, greatly increase working ...