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Photonic Universe

Morningstar SunSaver 20A 12V solar charge controller for motorhomes, boats, marine, oil and gas, telecom and instrumentation

Morningstar SunSaver 20A 12V solar charge controller for motorhomes, boats, marine, oil and gas, telecom and instrumentation

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20A 12V solar charge controller for use with solar panels up to 320W - ideal for harsh environments and hazardous locations

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.



As an official distribution partner of Morningstar products across the globe, we are proud to offer solar charge controllers from this world-leading supplier. Innovative design from years of dedicated research and superior build quality enable these top-of-the-range solar charge controllers to extend battery capacity and life, maximise energy production, and consistently achieve high performance standards.

This high quality Morningstar SunSaver 20A 12V solar charge controller is a third generation of the famous SunSaver range of solar charge controllers, with over 1 million units installed in over 73 countries for various applications, such as motorhomes and caravans, boats, yachts and marine, oil and gas, telecom and instrumentation, and household solar systems.

The controller is designed to protect batteries whilst charging them, providing automatic cut off to prevent over-charging and deep discharge. It comes with a full range of protection functions: overload, short circuit, high voltage, reverse polarity, high temperature, lightning and transient surges, reverse current at night.

Epoxy encapsulated for protection against humidity and dust ingress, the controller comes in an anodized aluminium case with marine rated terminals to prevent corrosion. With the working temperature range from –40°C to +60°C and certification for hazardous locations (e.g. oil and gas), this controller is a perfect choice for harsh environments.

Other key features of this controller include:

  • Extremely high reliability, with a failure rate of less than 0.1% and a long 5 year warranty
  • Dead battery recovery function which allows the controller to resume charging even if the battery gets discharged
  • Specific settings, such as slow switching charging mode for sensitive loads and instrumentation devices (e.g. telecommunications)
  • Automatic load control function depending on the battery condition
  • Easy to install and use, with factory pre-sets, fully automatic operation and fault recovery


This controller can work with sealed and flooded batteries. Its charging algorithm is compatible with lead-acid or NiCd batteries.

Click on the Details and Specifications tab for more information about this product.

Details & Specification


Controller specifications:

  • Certified for use in hazardous locations (Class 1, Division 2, Groups A,B,C,D)
  • Nominal battery voltage: 12V
  • Rated charging and load current: 20A
  • Solar input voltage up to 30V and power up to 320W
  • 3 pairs of terminals (input, battery, output), plus another terminal for the battery jumper
  • Multi-colour LEDs to indicate charging and battery status
  • Temperature sensor for automatic compensation (-30mV/C/12V) operating between -30°C and +60°C
  • Dead battery recovery minimum voltage: 1V
  • Self-consumption: < 8mA
  • Working temperature: -40°C to +60°C
  • Humidity: 100% non-condensing
  • Enclosure: IP10 (indoor)
  • Size: 152 x 55 x 32 mm
  • Weight: 230 g
  • Mounting holes for ease of installation


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




The product comes with an instruction manual (see the 'Documents' tab for a download link) which explains connections and operations.

If you need help with installation or have any technical questions we can provide FREE support - please contact us by email or phone (see Contact Us page for more information).


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