Champion has a great customer service dept and parts availably
The company is located in Santa Ana Calif
The Factory is in China
No it doesn't use twice the fuel of an inverter model the same size while running the a/c, it takes x amount of power to make y amount of electricity to run the a/c, and that means w amount of gas
A comparable size inverter model is a little more efficient and will save some gas, but Not 50 percent, maybe 10 or 15
The big savings of an inverter model over open frame of the same wattage
Is when charging batteries and watching TV , and it can coast along at low idle in Economy mode
Generally speaking an inverter model will have a smaller engine than the same size synchronus generator, where the engine always runs at the same speed, the small engine at low speed saves gas,
But when full power is needed it must run faster, typically over 4000rpm to produce the full output
An open frame synchronus generator has a bigger motor a bigger generator head and more startup surge ability , because of the weight an inertia of the mechanical parts and generator head
The 3600 will run your A/C, it will not run everything at the same time
A 1000w MW uses about 1500w input power, it and the a/c plus auxilary loads is an awful lot when it's 100f outside
Just turn off the a/c while using the MW
If you are going to be on private property, then you are not going to bother the sound police when using the 3600, yes it's louder than an inverter model
But it's not chain saw loud, ( like some would have you believe) the 68 db does meet national Park and forest legal sound restrictions
I used to have one and it served me very well, my current generator is the champion 3400w inverter model