The key appears to be to install Power Saver (high efficiency) air conditioners when planning to run two units on 30-Amp and/or 4,000-watt generator.
Power Saver 11,000 BTU/hr A/Cs draw under 10 Amps each, and the 13,500 just over 10 Amps at standard conditions. Based on specs the main advantage to 11,000 Power Saver is that they draw less start-up current. As I've mentioned before, Jayco installs two 11,000 units on some larger/medium-size motorhomes with 30-Amp and 4K Onan.
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