Your 30 amp service will not support a second AC, but you can still add it. I had a second AC put in our Gemini, tech wired it to a second 30 amp outlet on the side of the motorhome next to the existing one. I use a Y connector off the two 30 amp outlets on the coach, to a single 50 amp lead, and plug into 50 amp service. Works like a charm. You could also run two 30 amp leads, one plugged into 30 amp service, the other through an adaptor to the 50 amp service. We used both AC's in 97 degree heat, inside stayed a cool 71 degrees, and both AC's were still cycling. HUGE improvement.
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