Morningstar SunGuard™ SG-4 PWM Solar Controller 12v 4.5A - Not compatible with Lithium

Max. Solar Currant: 4.5A

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


  • 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
System Voltage 12v
Max. Solar Voltage 30v
Max. Solar Current 4.5A
Max. Solar Current (5 Min.) 5.5A
Min. Battery Voltage 6v*
Regulation Voltage 14.1v
Accuracy 60 mV
Self-consumption 6 mA
Ambient temperature -40°C to +60°C
Storage temperature -55°C to +80°C
Humidity 100% non-condensing
Tropicalization Epoxy encapsulation, Marine rated terminals, Anodized aluminum case
Dimensions 6.4 x 5.1 x 3.8 cm
Weight 0.09kg

*In periods following excessive battery drain, provided the controller is not power cycled, the controller can self-recover from a battery voltage of 1V and provide intermittent charging operation up to 6V at which normal operation will resume.

Barcode # SG-4
Brand Morningstar
Shipping Weight 0.1500kg
Shipping Width 0.120m
Shipping Height 0.070m
Shipping Length 0.090m
Shipping Cubic 0.000756000m3

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