I'm planning to install 4000 watts of solar panels on a ground mount and noticed the manufacturer requires gaps between each panel for thermal expansion. My idea is to fill these gaps with foam backer rod and then caulk over them, which would let me use the area underneath the array as a mostly dry shed. However, I'm wondering if there are any major issues I might be overlooking with this setup?
3 Answers
Just a heads up—if you ever need to replace a panel, you’d have to remove all that caulk, which could make maintenance tricky. Plus, keep in mind that solar panels can be fragile, so that’s something to consider too. I think those sealing strips made for panel installation might do a better job than caulk!
Have you thought about installing a gutter system underneath the gaps to catch any water that might come through? It could help manage any potential leaks while still allowing for proper expansion.
I actually use solar panels for the roof of my carport, and while it's not completely waterproof because of the gaps, it does keep things a lot drier than just out in the rain. So there's definitely some benefit to having them as a roof! Just don't expect it to be totally watertight.
That's a good point! I hadn’t considered the maintenance hassle, and I definitely want to avoid damage. Thanks!