The calculator adds about 15% due to loss of efficiency so 14.1A is reasonable for the calculator. However you need average input not maximum. AC appliances draw a lot of Ah (amp hours). The high efficiency Samsung 18 cu ft refer uses 100+ Ah per day.
Basically if you are going to use significant AC usage for devices then you'll need a very large battery bank, a large solar array AND a generator for those cloudy days. This is the reason most RVs to use propane for HW, MW, stove, refer and NO ACs for boondocking. Even propane for coffee!
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