Morningstar SG-4 Sunguard 4.5A Charge Controller

Regular Price: $51.00
ONLY: $39.00
Item Number: 020-01215

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The Morningstar SunGuard 4-12V, 12 volt, 4.5 amp charge

Morningstars SunGuard is the most advanced small, economical solar charge controller on the market today.

The MorningStar SunGuard is a fully epoxy encapsulated outdoor rated 4.5A "ice cube" sized 12V PWM charge controller. It has built-in temperature compensation, lightning protection and easy 4-wire hookup. The SunGuard's regulation voltage is set at 14.1 (best for sealed or gel batteries) and is not adjustable for battery type like MorningStar's other controllers. It's dimensions are 2.5" x 2.0" x 1.5" and it weighs just 3 oz.



  • ISO 9002 quality programs
  • Series design (not shunt)
  • 100% solid state
  • True 0 to 100% PWM duty cycle
  • Setpoint accuracy to 60 mV
  • Temperature compensation
  • Rated for 25% overloads
  • No need to derate
  • Lightning protected with 1500 W transorbs
  • Self-consumption is 6 mA
  • Fully encapsulated in epoxy potting
  • ABS plastic, impact-resistant case
  • Outdoor rated, Hypalon connecting wires


Standard Controller Features

  • Temperature compensation
  • High level of lightning protection
  • Computerized production testing
  • Ambient temperatures of -40° C to + 60° C
  • Expected 15 year life
  • Parallel capability for higher current ratings
  • Easy to use
  • Constant voltage, PWM series charging
  • Reverse current protection (at night)
  • ISO 9002 manufacturing
  • High efficiency, low self-consumption
  • Tropicalization: Epoxy or conformal coating
  • Five year warranty
  • No need to derate - 25% design margin

SunGuard's Technology Provides:

  • Exceptional Reliability
  • PWM Battery Charging
  • Consistent High Quality
  • Low Cost

The SunGuard is able to match the quality and performance of the world-leading SunSaver controllers because:

  • SunGuards are made on the same high speed, automated production lines
  • SunGuards use the same charging circuit
  • SunGuards use the same high quality components



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