Solar Cells use UV light and not visual light. So I'm not sure about using a UV protection. The reason I thought about RainX is hoping the rainwater would beed up and run off my panels as my panels are at an 11-degree slope from horizontal.Most waxes will have UV protection ... so, that wouldn't be good. Not sure about RainX.
You'd have to experiment with it with 2 side by side panels to see if performance is affected .... and then factor in how much difference it makes by the panels staying more clean.
Thanks, it was just an experiment as RainX beads up and runs off of windshields. Since we are not putting anything directly on the solar cells but the clear cover, I was thinking it wouldn't hurt. - But good old water my be all one needs.
I wonder what people do on their homes' roofs where they can't get to the panels with safety.