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Product Information

Model Part No. Battery Bank
Voltage (Volts DC)
Max Current Output
Per Controller
Morningstar SunGuard SG-4 Charge Controller360004112VDC VDC4.5


The SunGuard 4 12 volt controller offers most of the same features of the ProStar line, but without the battery status LED's, automatic equalization or the optional LCD display. The SunGuard 4 is a PWM controller and can control up to 4.5 array amps (can be paralleled for 40 amps or more). The SunSaver's advanced design delivers outstanding performance and value.

SunSaver's low cost is made possible by Morningstar's unique approach to design and manufacturing: automated production, latest power electronic power technologies, latest control and logic technologies, and high volume manufacturing.


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Features & Attributes

  • 100% Solid State
  • True 0 to 100% PWM duty cycle
  • Setpoint accuracy to 35mV
  • Marine rated terminals/ anodized case
  • Rated to 20% overloads
  • Fully encapsulated in epoxy potting
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Morningstar SunGuard SG-4 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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