South or West is best, but not mandatory. SunRise solar attic fans have solar panels that are very responsive to ambient sunlight. Unlike others on the market, our solar powered attic fans do not have to be oriented with a compass, or tilted toward the sun. If the roof location doesn’t have all-day sun exposure, SunRise Solar offers a Remote Panel Unit which has a remote solar panel that can be mounted anywhere you can find sun on the roof! On a north-facing roof slope, the remote panel can be placed over the ridge on the south side, allowing the solar panel to catch the most direct sun. Our 30 Watt SunRise 1600 attic fans are available with a tilting solar panel for that hard to find sunny spot.