I can start my 11k on 15amp without a softstart. Nothing else running of course. I think a 13.5 would start on 20. My old trailer had a 13.5 start on a 20amp breaker. ~ 20% of the time it would trip a breaker on start up.
If the breaker isn't tripped, it should try to start. If it needs more power, it will trip the breaker. Test and find out.. If its tripping the breaker, not something to do often as the constant brownout will degrade, eventually break electronics in the AC. Few times shouldn't hurt it. That's what a breaker is for..
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2018 Jayco Greyhawk 31FS
2023 Wrangler 392
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