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Photonic Universe

20A 12V/24V solar charge controller with LCD display for motorhomes, boats, lighting or off-grid solar systems

20A 12V/24V solar charge controller with LCD display for motorhomes, boats, lighting or off-grid solar systems

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20A solar charge controller / regulator with an LCD display and programmable settings for solar panels up to 320W (12V battery) / 640W (24V battery) - designed and made in Italy

SPECIAL NOTICE : If you are purchasing this part for a self build project, please see our terms & conditions. FULFILLED BY PHOTONIC UNIVERSE : This product is fulfilled by Photonic Universe, our Solar partner.



This 20A 12V/24V solar charge controller has been designed and produced in Italy by one of the leading European solar technology manufacturers, in accordance with the highest quality standards.

This solar charge controller uses PWM (Pulse Width Modulation) technology to improve charge acceptance and extend the life of your battery. PWM technology can also recover some lost battery capacity.

Key features:

  • Complete electronic protection of your battery and system, e.g. prevention of: current back-flow, overcharge / discharge, overvoltage, overload, short circuit, and reverse polarity 
  • LCD display showing advanced system information, including: power, voltage and current for the solar panels and battery, energy counter, temperature, load work 
  • Pre-set programmes for several battery types (sealed, AGM, gel, flooded lead acid) and fully adjustable low-voltage battery protection 
  • 100% designed and made in Italy to the highest quality standards, with a 5 year manufacturer warranty


This unit is compatible with sealed, gel and flooded lead acid batteries. It has pre-set charging programmes for different battery types, and battery low voltage protection can be also configured according to your requirements. Load working modes can be programmed for many different applications; for example to set on/off timers for lighting/ fans/pumps. 

This controller is compatible with solar panels with a combined power of up to 320W (12V battery) / 640W (24V battery) and voltage of up to 55V, although this controller works most efficiently with solar panels with an operating voltage of 17V-20V (with a 12V battery) / 34V-40V (with a 24V battery).

Click on the Details and Specifications tab for more information


Details & Specification


Controller specifications:

  • Fully automated operation and auto 12V/24V selection
  • Rated charging and load current: 20A
  • Enhanced monitoring and charging / load work control
  • Maximum solar panel input voltage 55V
  • 3 pairs of terminals (input, battery, load) for wire up to 10mm2
  • Temperature sensor: built in
  • Full set of electronic protection functions
  • Self-consumption: 8mA
  • Working temperature: -10C to +60C
  • Size: 15 x 12 x 5 cm
  • Weight: 500 g
  • Multiple mounting holes for ease of installation


This product is covered by a 5 year manufacturer warranty. For more information please refer to our Terms and Conditions.



This controller is supplied with a detailed instruction manual which explains wiring and operations (see Documents tab).



The following documents are available to download:

User manual for 20A 12 / 24V solar charge controller (WREG20)

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