Running ac off of generator while driving.

jfskeet wrote:
Has anyone noticed much of a difference with running house air over chassis air while driving. Is the power gain noticeable with house air generator combo? . Around the campfire last weekend was a few different opinions. with fuel use and power gain/ loss.


We all had A gassers.
What did you see in the difference?

Jeff

The difference that I see is about .5mpg. With no AC I average 8.7 mpg(over 90k miles) with chassis AC mpg drops to 8.2, with 2 roof top AC's running from 5.5 kw genset mpg drops to 7.7. Having said all that on very hot days (90 degrees plus)the roof top AC's do not cool the front area very well without the chassis AC running also. Most of the time(70-85 degrees) I just run with the chassis AC. I made a curtain that goes in back of the seats that really keeps the front cool but have only had to use it a few times in 15 years. I look for ways to use the genset so I don't have to exercise it at home each month so running it while driving for an hr under AC load is good.