The SunGuard™ is a single module, compact PWM solar charge controller for small systems, ideal for both professional and consumer use. With SunGuard, there’s no reason not to insist on Morningstar quality with any system design—no matter how small.

“Rock solid, potted so waterproof, long track-record…great charge controller for a small system”

Models: SG-4,

Specifications and Certifications by Model

Model SG-4
Charge Rating 4.5 amps
Max. PV Open Circuit Voltage (Voc) 30 volts
Nominal Battery Voltage 12V
Self-Consumption 6mA
Voltage Accuracy 60mV
Operating Temperature Range -40 C to +60C
Warranty 5 Years
CE and RoHS compliant Yes
Manufactured in a Certified ISO 9001 Facility Yes
Key Features and Benefits
  • 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