gallons per idle hour?

i could understand a heavier than normal Tripac burn rate in a Dallas summer under heavy 24/7 AC and hotel loads, but 0.33 gal/h is obscene for a Tripac...normal burn rate is projected closer 0.1 gal/hr, under constant AC and hotel loads maybe possibly edging close to 0.25 gal/h, but 0.33 gal/h sounds like it's just squirting diesel on the ground. The truck being a 12.8L inline 6, and it burns about ~1 gal/h idling... The Tripac is a Yanmar 0.57L 2-cylinder. How in tf would it burn 1/3 a gal/h unless something is wrong with it?

 

I should have said (about) 0.33 gph at full strength on a Tripac 2013 model. In most cases, of course, the APU will not run at full strength and will turn off once the desired temperature is reached, which usually happens to be at night. So I agree with Stevens Transport conclusion of 1 gallon every 4-6 hours, which translates to 0.17 to 0.25 gph on the Tripac (old model). The Tripac evolution is probably more fuel efficient.