Model # SC12

Internet #203493066

US Sunlight SunFan Solar Controller for Solar Powered Attic Fans

Discontinued US Sunlight

SunFan Solar Controller for Solar Powered Attic Fans

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Product Overview

Run your US Sunlight Solar Fan into the evening, monitor temperature and humidity, and monitor fan operating status with the award winning Solar Controller. Addition of the Solar Controller with Dual Mode Technology will enable your US Sunlight Solar Powered Attic Fan or All Purpose Ventilator to run after sunset, or when there is no light available from the sun. Solar Controller is designed to work only with US Sunlight Corporation ventilation products.

  • Built-in Temperature Sensor monitors the attic temperature and will turn on the fan when the temperature reaches 80 degrees and will turn off the fan when the temperature dips below 77 degrees
  • Built-in humidistat monitors the attic humidity and will turn on the fan if the attic air reaches 75% relative humidity and will turn it off at 65% relative humidity
  • Estimated annual operating cost to be less than $5 per-year
  • Remote control unit displays the current attic temperature and relative humidity
  • Lets you know at any time if your fan is running and if the power source is from the solar panel or house electricity
  • Power your U.S. Sunlight Solar Attic Fan when sunlight is not available, using house power on an intermittent cycle – 15 minutes on, 15 minutes off for up to 10 hours or until solar power becomes available again
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Name 365 CFM Mill Finish 5 Watt Solar Powered Roof Mounted Exhaust Attic Fan 365 CFM Green Powder Coated 5 Watt Solar Powered Roof Mounted Exhaust Attic Fan 365 CFM Weatherwood Powder Coated 5 Watt Solar Powered Roof Mounted Exhaust Attic Fan SunFan Solar Controller for Solar Powered Attic Fans
Brand Active Ventilation Active Ventilation Active Ventilation US Sunlight
Ratings (10) (4) (7) (5)
Power Type Solar Solar Solar Solar
Wildlife Guard Yes Yes Yes No
Ventilation Type Exhaust Exhaust Exhaust Other
Material Aluminum Aluminum Aluminum Resin
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Cut-Out Diameter (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Color Family
Color/Finish Family
Power Type
Product Weight (lb.)
Recommended Sq. Ft.
Thermostat Controlled
Ventilation Type
Voltage (volts)
Wattage (watts)
Wildlife Guard

Warranty / Certifications

Manufacturer Warranty
1-Year warranty

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Customer Questions & Answers

AC required?

Do you have to run this off AC or not?
Asked by: tom
AC is required if you want the fan to run after sundown, which is the whole point of using this controller. It is not a solar battery charger, and does not store solar energy itself.
Answered by: Bob
Date published: 2015-11-01

Which solar attic fan models of US Sunlight are compatible with this specific and particular unit?

I have read product overview and specifications of US Sunlight's all solar attic fans' and solar controllers. One person (thekid143) asked a question about particular this unit model # SC12. And there is a answer from someone (CommunityAnswer) that it can be use with any fan. How it could be possible? Most of US Sunlight's solar attic fans' motor need 38 DC Volts and this unit release 12 (DC) Volts & 18 Watts output. I think and understand that Watts can be different, but Volts should be the same in amount & type. This is all from as my knowledge & understanding. It could be wrong too. But there is big surprise that there is no any single answer from US Sunlight.
Asked by: Gem
If you're buying a US Sunlight fan, you simply have to contact them and they'll tell you which models are compatible with this controller. If you ask about other manufacturers' fans, they'll just tell you none are compatible, which isn't exactly the case. US Sunlight doesn't make it easy, as they are totally tight-lipped with regard to their products' technical specifications. But I can tell you that the SC10, SC12, and SC20 will work with virtually all fans sold for solar use; you just have to make sure you have the polarity correct so the fan pulls air out of the attic. These fans generally have motors rated for 38V, but they still work at lower voltages. The SC20, however, uses an 18V AC adapter instead of the others' 12V adapters, so the fan will spin faster on intermittent mode. In the same way, these controllers can be used with solar panels other than ones sold by US Sunlight. The SC10 and SC12 require panels rated 10W or higher. The SC20, however, requires panels 20W or higher -- if you hook up a lower-wattage panel, its solar function will not work. Again, if you're mixing and matching components, keep an eye on polarity.
Answered by: Bob
Date published: 2015-11-01

can this item be added to any solar panel attic fan or does it only work with some models

Asked by: thekid143
This can be used with any fan.
Answered by: CommunityAnswer
Date published: 2015-09-20
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Customer Reviews

SunFan Solar Controller for Solar Powered Attic Fans is rated 4.2 out of 5 by 5.
Rated 2 out of 5 by from Too sensitive to cloudcover on bright days. Without the controller the fan would continue to run, albeit at a lower speed. This is much preferred to the fan being stopped by the controller and going into a intermittent mode where the fan is not running but every 15 minutes. It should be left on solar power until it dark not in the middle of the day with some cloud cover! I have been giving thought of bypassing controller and seeing if by nightfall if the extra run time that the controller provides is even needed.
Date published: 2013-07-30
Rated 5 out of 5 by from WORKS AS DESCRIBED Nice to monitor activity remotely. is not a remote control.
Date published: 2013-08-23
Rated 5 out of 5 by from Best Price on WEB! Shipped as advertised, price was the cheapest on web.
Date published: 2015-06-02
Rated 4 out of 5 by from good only draw back is that if solar is not avaliable the fan will run off of electricity for a interuppted amount of time. after that time is done the fan will be off for 12 hrs. so hopefully it runs all day long on solar and then at night turns on and off til the timer is up.
Date published: 2013-07-07
Rated 5 out of 5 by from DYS-Install easy,units work excellent Parts arrived in 3 days, Home Depot on line excellent. Would recommend. 5- star.
Date published: 2013-05-21
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