Resealing Solar PV Frames

If you clean the surfaces carefully silicone might be a good
choice for resealing the frame. I suggest you use a good grade
of marine silicone, and make sure it is approved for use with the
frame material.

Silicone often fails and then you have a mess worse than you
started with. The way of preventing that is using quality
silicone that is approved for the application.


Also consider if you need to provide some ventilation as well as
weep holes on the back, bottom of the panels, and that the panels
don't get splashes up from the mounting surface into such holes.

I've noticed that in certain climates a lot of moist air gets
sucked into panels as the evening turns cold, condenses, and
accumulates over time. If there is air circulation the daytime
heat should evaporate the moisture back out.