These are very interesting discussions. One day I had the idea to take the fantastic vent cover, replace or modify it with a small array of solar cells, then hook this up to a very small "computer" fan that was attached to the Fantastic vent arms that hold the motor. I don't think the solar cells could ever produce enough power to run the stock motor, but a small second motor, run only on solar, could vent the camper when the sun is out. Crank the cover, moisture away!
What do you guys think?
Dave