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Product Information

Model Part No. Battery Bank
Voltage (Volts DC)
Max Current Output
Per Controller
Morningstar SunSaver Duo SSD-25RM Charge Controller368042212VDC VDC25


Morningstar’s SunSaver Duo is an advanced PWM two battery controller for RV’s, caravans, boats and cottages. This product will charge two separate and isolated batteries at the same time, such as a “house” and an engine battery, based on user selectable priorities. 

The SunSaver Duo employs Morningstar’s legendary SunSaver controller technology, whose long-term track record for high reliability and improved battery charging is well-recognized in the solar industry. This controller also includes a backlit remote meter which may be mounted in or on a wall, and displays digital and pictorial status information about the solar power system. 

The SunSaver Duo is epoxy encapsulated for environmental protection, is user adjustable via DIP switch or connection to a personal computer, and has an optional remote temperature sensor.

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Features & Attributes

  • Two Battery Charging
  • Provides Useful Information
  • Lower Cost
  • Easy to Install
  • Longer Battery Life
  • Extensive Electronic Protections
  • Highly Reliable
  • Epoxy encapsulation protects the controller against dust and high humidity.
  • Efficient electronics and a conservative thermal design allow the controller to operate reliably at high temperatures.
  • Five year warranty and estimated 15 year life.
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Morningstar SunSaver Duo SSD-25RM Charge Controller

Product Manual
Spec. Sheet
Country of Origin Certification Letter
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About Morningstar

Morningstar Corporation is a world-leading manufacturer and supplier of solar charge controllers and inverters. Since their inception in 1993, over 2.5 million Morningstar units have been installed in over 112 countries around the world. Morningstar controllers and inverters have set new standards in performance, quality, reliability and innovative features, and global solar markets have consistently recognized Morningstar's products as the industry's best overall customer value.

Manufacturing is conducted in a fully-automated, world-class ISO 9001 facility, and quality control includes 100% functional testing on every product, using the latest computerized test equipment and processes.

For over 20 years, Morningstar has preserved its ownership, management and strategy, which has allowed the company to build trusted, long-term relationships with its employees, customers and suppliers.

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