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Your present location:Home >> Products >> CK Series Solar Controller >> PWM 20A/30A >> CK20U/CK30U Solar Charge Controller
  • Name: CK20U/CK30U Solar Charge Controller
  • Added time: 2016-02-20
  • Views : 417


CK20U 10A/20A 12V24V auto work

CK30U 30A 12V24V auto work


  • Vivid LED indicators show system battery capacity, charging and discharging state of battery.
  • Protection functions such as overcharging, over discharging, overloadand reverse connection.
  • PWM charging increases charging efficiency by 3% to 6%, compared with non-PWM charging.
  • The parameters of charging and discharging are preset, so no need to adjust the parameters. (Special parameters need to be advised in advance.)
  • USB output function.
  • PV array short circuit protection
  • PV array over-voltage protection
  • PV array over-current protection
  • PV array polarity reverse connection protection 
  • Battery low voltage disconnection
  • Battery over-voltage disconnection
  • Battery polarity reverse connection protection
  • Over-load protection
  • Load short circuit protection


Technical Data


Model CK20U CK30U
System voltage 12V/24V (Auto)
Rated current 10A,20A 30A
No load loss ≤12.5mA (USB disconnect)
Charging mode PWM
Float charging voltage 13.8V/27.6V
Absorption charging voltage 14.4V/28.8V(lasting time: 2 hours)

Charge/Discharge circuit voltage drop

<0.22V (<0.12V)
Low voltage protection 10.7V/21.4V
Low voltage reconnecting 12.6V/25.2V
Overloading ≥1.2*rated current, 60s
≥1.5*rated current, 10s
≥1.8*rated current, 0.2s
USB output 5V, 1A
Installing cables size ≤6mm2
Working temperature -20℃~ 50℃
Dimension (L xW xH) 188mm x95mm x40mm
Net weight 340g 355g