The weight of mine, per the yellow label, as it left the factory was 13,181. That includes, per the label, full propane and full gasoline in the tank for the generator. That does include my generator as well.
When I weighed it last year I had added my "stuff" and had about 1/3 of a tank of fresh water. I had also replaced the original 12v battery (single) with two Trojan T105's.
Remember, the balance of the total weight is on the truck (pin weight), but the weight on the trailer axles per my weight last spring was 11,850 as I reported earlier.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof