Morningstar SG-4 Charge Controller

Morningstar SG-4 Charge Controller

Morningstar SG-4 Charge Controller

Regular price $32.50
Tax included.

SunGuard is a single module, compact solar charge controller for small systems, ideal for both professional and consumer use. Featuring the same components, charging circuit, and build quality of Morningstar’s industry-leading SunSaver controllers, SunGuard is easily the most compact, advanced and economical solar charge controller on the market today. With SunGuard, there’s no reason not to insist on Morningstar quality with any system design—no matter how small.

  • Rugged design—100% solid state, epoxy encapsulated; rated for 25% overcurrents (no need to de-rate)
  • Longer battery life—series design PWM charging (instead of shunt) with temperature compensation, low self-consumption
  • Easy to install—outdoor rated connecting wires make a waterproof connection to the solar module and battery


Warranty - 5 years

• ISO 9002 quality programs
• Series design (not shunt)
• 100% solid state (no relays)
• True 0 to 100% PWM duty cycle
• Setpoint accuracy to 60 mV
• Temperature compensation
• Rated for 25% overcurrents
• Rated for 100% continuous duty
• Includes 1500W of lightning surge protection
• Self-consumption is 6 mA
• Fully encapsulated in epoxy potting
• ABS plastic, impact-resistant case
• Outdoor rated, Hypalon connecting wires


Mechanical Specifications
Wire size #16 AWG
ABS plastic case
Epoxy encapsulated
Weight is 3 oz (0.09 kg)
Dimensions: 6.4 x 5.1 x 3.8 cm / 2.5 x 2.0 x 1.5 in
Electronic Specifications 
Rated Solar Input 4.5 Amps
Max. Input (5 min.) 5.5 Amps
System Voltage 12 Volts
Max. Solar Voltage 30 Volts
Regulation Voltage 14.1 Volts
Accuracy 60 mV
Self-consumption 6 mA
Temp. Compensation -28 mV/oC
Operating Temperature –40 to +60°C




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