Ductless AC instead of roof mounted AC

Gulfcoast wrote:
I think a 115 volt mini-split is a great idea, but here's my question.
My 13,500 rooftop unit will not cool our 200 sf trailer at 90-degrees outside.
Will a 12,000 btu mini-split keep it comfortable? I'd hate to do all that work and still be hot.

You bring up a good point.
The roof ac coming off this Terry EXPO 24LZ (147 square ft) is a 13,500BTU unit too. The unit was DOA when I got the trailer and the previous owner said it did an ok job (hard to quantify).
The rub is above 12k BTU the units are all 220V.
That is why I questioned earlier about campsites with only 110v 30A available.
I have a 220v 30amp generator but don't want to run it in a campsite with shore power. The neighbors probably wouldn't like the noise either.
The Ductless mfg says it can cool 400 to 600 sq ft or about 2.7x to 4x the size of my camper.
The next step up is 18k BTU 220VAC

I'm currently replacing the roof and plan to replace the R6 insulation with R32. This should help some. I am also enclosing the bottom of the trailer with Corex material (the same stuff the political signs are made from, only thicker)purchased in 4x8 sheets. I would like to insulate too but am worried that it might hold water.I might try the bubble wrap stuff (r values are pretty low).

The sides of the trailer are insulated with 1/2 inch thick foam about R3.25, cant do much about this.