Victron Blue Solar Pro 12V/24V/20A PWM Charge Controller

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The PWM controller is in essence a switch that connects a solar array to the battery. The result is that the voltage of the array will be pulled down to near that of the battery. The MPPT controller is more sophisticated (and more expensive) it will adjust its input voltage to harvest the maximum power from the solar array and then transform this power to supply the varying voltage requirement of the battery plus load.Thus, essentially it decouples the array and battery voltages so that there can be, for example, a 12 volt battery on one side of the MPPT charge controller and panels wired in series to produce 36 volts on the other. It is generally accepted that MPPT will outperform PWM in a cold to temperate climate, while both controllers will show approximately the same performance in a subtropical to tropical climate. The BlueSolar PWM-Pro series is ready for use with its default settings. It also is fully programmable.




  • Lighting control function, fully programmable.
  • Three stage battery charging (bulk, absorption, float), fully programmable.
  • Integrated battery monitor function (Remote Panel needed to display state of charge).
  • Load output with low voltage disconnect and manual control (default setting).
  • Optional external temperature sensor.
  • Load output protected against over load and short circuit.
  • Protected against reverse polarity connection of the solar panels and/or battery.

Technical Specifications

  • Battery Voltage – 12/24V with automatic system voltage detection.
  • Rated charge current – 20A.
  • Automatic load disconnect – Yes.
  • Maximum solar voltage – 28V/55V (1).
  • Self – consumption – < 10mA.
  • Load output – Manual control + low voltage disconnect.
  • Protection – Battery reverse polarity (fuse)/Output short circuit/Over temperature.
  • Battery temperature sensor – Optional.
  • Temperature compensation – 30 mV / °C resp. – 60 mV / °C (if temperature sensor installed).
  • Remote panel – Optional.
  • Grounding – Common positive.
  • Operating temp. Range – (-20 to +50°C).
  • Humidity (non – condensing) – Max 98%.
  • Dimensions (H x L x w) – 160mm x 82mm x 48mm.
  • Weight – 0.3Kg.
  • Terminal – 4mm².
  • Protection Category – IP30.

Additional information

Weight 0.16 kg
Dimensions 4.8 × 8.2 × 16 cm


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