FYI, I used a 3-light tester to check my retractable power cord installation and found ALL 120VAC outlets reported HOT/NEUTRAL REVERSED when running on the generator. I connected to shore power and found all 120VAC outlets reported CORRECT! Contacted manufacturer to report this "Anomaly" Rig is going into the shop next week for a check-up!
The AC Line Tester is your Friend!!