Thanks for all the info and thanks to 2oldman for the links. I saw one those but it was dated so I asked the questions anyway.
I need to go over and check the specs on my a/c. It is on my storage lot. I am now leaning toward the 2400. A few dollars more and heavier but it may run my a/c if I need to. Then I can get rid of my really old Homelite 2000 that I have around the house for hurricane outages.
I think I have a manual for my a/c in the TT but just in case, Is there usually a spec plate on a TT a/c like a home a/c. Mine is on a 2007 718fd Aerolite.
Thks again...