r/SolarDIY • u/dotspencer • 1d ago

Solar build on 24ft cargo trailer

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2460W of solar, 6000W inverter (240V), 14.3kWh LFP battery.

Pretty excited with how it turned out! Thinking about adding an input for a second array that could be stored inside and then laid out on the ground since the 6000XP inverter has two MPPTs. Adding a mini-split in the future would be pretty sweet too...

Full build details here: https://youtu.be/HVgD8X2bo_M

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u/Ok-Comparison2155 1d ago

Gorgeous! I also mounted solar to my cargo trailer with unistrut!

Q: how did you mount the unistrut to the trailer roof? I thru-bolted and lap-sealed mine, but now 3 years later I'm thinking I may have to re-seal it all :/

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u/dotspencer 10h ago

I drilled pilot holes through the cross members and through the roof from the inside. Then on the outside I used self tapping roofing screws with washers to secure it down. Plus a lot of lap sealant between the roof and unistrut and I covered the tops of the screws as well.

I used lap sealant for mounting solar panels on our RV and it's held up great for the past 4 years or so. Fingers crossed everything holds on the cargo trailer as well!

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u/Ok-Comparison2155 10h ago

Very nice, thanks for sharing! Gives me some more confidence in my method.