PWM Solar Charge Controller 12/24V 20A

PWM Solar Charge Controller offer an efficient, safe, multi-stage recharging process that prolongs battery life and assures peak performance from a solar array.



  • 12V/ 24 V system voltages are automatically recognized.
  • An upgraded 3-stage PWM charging algorithm is adopted. Application of an equalizing charging to the battery periodically or when over discharged, can effectively prevent the battery from non-equalization and sulfuration, thus extending the battery’s service life.
  • With temperature compensation employed, charging parameters can be automatically adjusted.
  • A wide range of load working modes facilitate the product’s application to different types of load.
  • The product provides overcharge, over-discharge, overload protection, as well as short-circuit protection.
  • By virtue of an advanced load starting method, large-capacitance loads can be started smoothly.
  • The product provides a dot matrix graphic LCD screen and a human-machine interface with a key.
  • The user-friendly design of browser and dynamic interfaces ensure convenient and intuitive operations.
  • TVS lighting protection is adopted.



Model HP2420
Rated current 20A
current display function  No
System voltage Automatic recognition of 12 V/ 24 V
No-load loss < 10mA/12V;< 12mA/24V
Max. Solar energy input voltage <55V
Max. voltage <35V
at the battery end
Overvoltage protection 17.0V;×2/24V;
Equalizing charging 14.6V;×2/24V;
Boost charging voltage 14.4V;×2/24V;
Floating charging voltage 13.8V;×2/24V;
Charging recovery voltage 13.2V;×2/24V;
Over-discharge recovery voltage 12.6V;×2/24V;
Over-discharge voltage 11.1V;×2/24V;
Equalizing charging interval 30days
Equalizing charging time 1H
Boost charging time 2H
Temperature -3.0mV/℃/2V
Light control voltage Light control on 5V, ×2/24V;
light control off 6V, ×2/24V;
Light control 1minute
judgment time
Operating temperature -25℃ to +55℃;
IP protection degree IP30
Net  weight 160g
Protection functions Solar panel short circuit and reverse-connection protection
Over-temperature, overload and short circuit protection
Dimensions 130×75×38 (mm)


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