Just got a 100w panel and want to run a 12v 80w radiator fan, NO BATTERY. The panel is cranking out 23v do I need to put a controller in the middle. All controllers I look at have a battery hookup b...
I had a solar attic fan in a previous house. Pretty large fan and pretty small panel. No battery. Accomplished exactly what you want. Ran when the sun was out, passive when no sun. Even had a thermal switch you could loop in. It was rated for like 1500 CFM. Don't see why the same method would not work with your setup.
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