RICH SOLAR 20 Amp PWM Solar Charge Controller Positive Ground



  • 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.
  • Boasting an industrial grade design, the product can function well in various tough conditions.
  • TVS lighting protection is adopted.



  1. SKU: SOL-PWM20 
  2. Model: HP2420
  3. Rated Current: 20A
  4. System Voltage: Automatic recognition of 12V / 24V
  5. No-Load Loss: < 10mA/12V; < 12mA/24V
  6. Max. Solar Energy Input Voltage: < 55V
  7. Max. Voltage At The Battery End: < 35V
  8. Overvoltage Protection: 17.0V; x 2/24V;
  9. Equalizing Charging Voltage: 14.6V; x 2/24V;
  10. Boost Charging Voltage: 14.4V; x 2/24V;
  11. Floating Charging Voltage: 13.8V; x 2/24V;
  12. Charging Recovery Voltage: 13.2V; x 2/24V;;
  13. Over-Discharge Recovery Voltage: 12.6V; x 2/24V;
  14. Over-Discharge Voltage: 11.1V; x 2/24V;
  15. Equalizing Charging Interval: 30 days
  16. Equalizing Charging Time: 1H
  17. Boost Charging Time: 2H
  18. Temperature Compensation: -3.0mV/°C/2V
  19. Light Control Voltage: Light control on 5V, x2/24V; light control off 6V, x2/24V;
  20. Light Control Judgment Time: 1minute
  21. Operating Temperature: -25°C to +55°C;
  22. IP Protection Degree: IP30
  23. Net Weight 0.35 lbs (160 g)
  24. Protection Functions: solar panel short circuit and reverse-connection protection, over-temperature, overload and short circuit protection
  25. Dimensions: 51.2 x 30.0 x 15.0 inches (130 x 75 x 38 mm)


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