It's certainly true that a 50A RV circuit is designed for and can deliver 12K watts. But it would be a rare RV that actually used that much power.
One cold evening I returned to the prior rig and used 62A from 2 heat pumps, 2 ceramic heaters and some other loads. Perhaps I could challenge myself on the current rig and use 80A with 3 heat pumps and 3 ceramic heaters.
You can't include the inverter wattage in the AC load; it runs on batteries and its load is subtracted from the AC line.
Your dryer uses about 30A total. AC's about 15A each IF they are all 15K BTU units. 10K genset is good for about 80A. And you are in the 1-2% of class A's that use that much power.
The inverter runs on batteries when the coach is unplugged - it charges the batteries, and conditions the A/C when it's plugged in. ALL the plugs run through it, see the list of that side of the circuit which is one leg of the 50a incoming power.
Oxygen Machine 5
Coffee Maker 9
TV's & Misc 2
Hyro-Hot Elec Heat 13.75
INVERTER SIDE 61.55
The dryer is 240V - so if the dryer was on you could add another 15amps to that.
3A/C's and the fan motors for them - this is the other leg from the power box - actually from the spec sheet 17.4 each. So if all 3 were running on high that's 52.2 just for the A/C's. The WASHER, the other side of the dryer, and a few other sundry items also run on that side. so that side also can pop over the 50AMP mark if you run everything at once. Turn all 3 airs on and start the dryer - pop!
One never has EVERYTHING running at once, which is why you can put that much potential load on the system.
On the 1-2% comment - it used to be we were the only tag axle in our home park 90% of the time. Today - there are 5 other tag axles in here and every one of them could probably blow a 50A circuit if they turned everything on at once. The number of big rigs is growing and as more and more of the baby boomers turn into fulltimers or even snow birds we'll continue to see that number grow.
2007 Allegro Bus 42QRP ("TisIt")
2006 Heritage Softail/HydraLift ("Ruby")
2006 Hummer toad ("MLOYL") www.jandse.com
What goes around comes around - always treat others the way you'd like them to treat you.