There may be a large current fuse in the line from the battery to the generator. 100 amp or so is not uncommon. If equipped, it's usually located near the battery. Type ANL fuses are often used, like the one shown below.
Dutch
2001 GBM Landau 34' Class A
F53 chassis, Triton V10, TST TPMS
Bigfoot Automatic Leveling System
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox baseplate