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Charge Controllers arrow Morningstar SunKeeper SK-12 Controller 12V/12A

Morningstar SunKeeper SK-12 Controller 12V/12A

Price: $89.00


The SunKeeper is available in a 6 amp or 12 amp version (both at 12 volts DC). To withstand the high temperatures at the solar module, the controller has been designed using extremely efficient power electronics and is rated to 70C. The SunKeeper is also certified for use in Class 1, Division 2 hazardous locations, making it an ideal controller for solar powered oil/gas applications.

SunKeeper solar controller provides a low cost regulated output directly from the solar module to maximize battery life in small solar power applications. The SunKeeper is epoxy encapsulated and rated for outdoor use. By mounting directly to the module junction box and wiring through the junction box knockout, the connection is weather-proof. This eliminates the need for an additional housing for the controller.

Key Features and Benefits:

High Reliability

Rated to 70C to operate in high temperatures at the solar module.

More reliable than controllers mounted inside the junction box. Uses very low on-resistance power MOSFETs. No need to re-rate.

Outdoor Rated

ETL approved for outdoor use without an additional enclosure. Rugged IP65, UV resistant case. Epoxy encapsulated printed circuit board and watertight connection to the module junction box.

Extensive Electronic Protections

Fully protected against reverse polarity, short circuit, overcurrent, lightning and transient surges, high temperature and reverse current at night.

Longer Battery Life

Series PWM with 3 stage charging: bulk, PWM regulation and float. Includes temperature compensation at the controller or alternatively at the battery when using optional remote temperature sensor. Able to charge a zero voltage battery.

Rated for Hazardous Locations

Specifically designed for solar power systems in the oil/gas industry. Approved for use in Class 1, Division 2, Groups A,B,C,D.

More Information

Bi-color LED is easy to read from the ground when the solar module is pole-mounted. Indicates solar charging, regulation, normal nighttime operation and any controller or system faults.

Easy to Install

Fits standard half inch conduit knockout (PG 13.5, M20) in module junction box. Quickly fastens with included locknut. Wires have fork connectors for easy connection to solar module terminals. or

WARRANTY: Five year warranty period. Contact Morningstar or your authorized distributor for complete terms.

8.0 Technical Specifications


Nominal System Voltage 12 V

Maximum Solar Input Voltage 30 V

Rated Solar Input:

SK-6 6 A

SK-12 12 A

Self-consumption Current < 7.0 mA (charging)

~2.0 mA (night)

Battery Operating Range 0 15 V

Battery Charging Setpoints:

Regulation Voltage 14.10 V (@ 25C)

Float Voltage 13.70 V (@ 25C)

Temperature Compensation -30 mV / C

Maximum Charge Voltage Limit 15V


Power Wires (red-yellow-black) 2.0 mm2 / 14 AWG

RTS Wire Loop (blue) 0.13 mm2 / 22 AWG

Leads Conductor Material Copper

Weight 0.11 kg / 0.25 lbs

Dimensions 99x51x13 mm / 3.9x2.0x0.5 in

Knockout Size M20 / PG 13.5 /


Ambient Temperature Range -40 C / -40 F to 70C / 158 F

Storage Temperature Range -55C / -67 F to 85C / 185 F

Humidity 100 %

Oxygen Concentration < 21 % by vol.

Atmospheric Pressure 1 atm



Reverse Polarity Solar and Battery

Short Circuit Solar

Charging Over-current

High Temperature shut-down

Temperature Sensor Failure

Nighttime Reverse Current Leakage (no blocking diode needed)



UL 1604 and CSA 22.2 No. 213-M1987 for use in Class 1, Division

2, Groups A,B,C,D hazardous locations


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