Stealth • 5m
I actually did something similar for a portable offgrid workspace setup. Used a 2000 BTU 12V Nomadic Air portable AC powered by 300W solar + 300Ah lithium batteries. Stayed cool even in desert conditions, though batteries needed recharging every few days. The key was using rigid foam insulation boards for all surfaces, thick rubber gaskets on openings, and radiant barrier coatings. Got the cooling load down to where a tiny AC could handle it. You're on the right track thinking insulation-first.
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