i run my a/c with my champs
full throttle is not correct, constant 3600 rpm is correct
it will open the throttle and use more gas when the a/c is running
but unless it is only 80F my a/c doesn't cycle much
at 103F it doesn't cycle at all
either type generator will be using all the fuel needed for 'That Engine' to produce electrical power
and at this point the difference is 'quite' small around 10 percent fuel savings when running a constant a/c load for hours on end, say 6 hrs straight from 1pm to 7pm, there is NO cycling and NO extra 'low load' fan only power use
we full time, and i charge batteries and use the MW, year round
the inverter model gives us reduced noise level and reduced fuel use during the 6 months we don't need A/C
during the summer the advantages are not nearly as great , if we were hot year round, i probably would not bother with the extra cost of the inverter model