Morningstar SG-4 Sunguard 4.5 Amp 12 Volt Solar Charge Controller
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Temperature compensation High level of lightning protection Computerized production testing Ambient temperatures of 40C to +60C 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
Wire Size AWG/mm2
#16 / 2
3 / 0.09
SunGuard can be mounted in any position. It is best to mount to a vertical surface and allow space for air flow through the controller.
First connect the Battery BLACK wire (negative) to the battery. Use either black wire since they are connected together inside the controller.
Connect the RED Battery positive wire to the battery.
Connect the Solar array using the other BLACK wire and the YELLOW Solar positive wire. Be very careful not to short circuit the solar array, or the controller will be damaged.
SunGuard prevents reverse current leakage at night, so a blocking diode is not required in the system.
A negative earth ground at the battery is recommended for most effective lightning protection.
SunGuard can be mounted outdoors. Do not expose to ambient temperatures above 60°C. Make sure that water will drain from inside the case.
Free ShippingFree shipping is only available for orders shipped within the 48 contiguous United States. A shipping fee will be calculated and invoiced on orders shipping outside this area. The shipping fee must be paid before an order ships.