Back in 2015 I called Dometic customer service and asked about adding a Hard Start to my 15K and they said it was necessary because they now are already engineered for Hard Start. I've been running both my 15K and my 13.5K on generator multiple times and have experienced no issues. They seem to run fine. Once, when it was very hot and the 2 units had both cycled down, they attempted to both come back on at the same time. The generator shut down with overload. I restarted the gen, restarted the 15K, waited about a minute or 2 and restarted the 13.5k and they ran all the rest of the day just fine.
Most of the time, we only run 1 A/C at a time. Bedroom 13.5 while we are in the Living Room and then 15K Living Room while we are in the bedroom at night. This puts the noise furthest away.
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 16" E; Ride Rite AirBags w/AirLift 1 wireless compr; Adv.Folding 4 Cover Andersen Ultimate II Aluminum 5erhitch on Reese Flipball w/Curt 4" offset ball LCI Ground Control 3.0 4pt + 2pt Elec.Rear stabilizers; 3 Slidecovers; 10ft. Portabote 6000# Dexters; mor/Ryde CRE3000 w/HD Wetbolts; King Dish Tailgater; 5hp Outboard Dual A/C; Furrion 48 Rear Camera; Champion 3100 Inverter w/Extended Run