Maverick's trucks.

Can answer 5 and it kinda goes with 6.
Newer maverick trucks (20s i know) have the opti-idle.
They epu will cool cab and when batteries get so low, have the opti idle set and the truck will start and run for a bit and charge batteries then shut truck down, kinda like a reefer.
Takes some getting used too.

 

Probably irrelevant information now, but my first truck as an owner operator was an ex CFI , T2000, 2001 model.

Well maintained at 900k, served me well.

 

I don't know what kind of trucks Maverick uses, I think its those purplish reddish Cascadias. I've used the same Cascadia for another company so:

1. Loaded with what? Loaded to 80k? You'd be lucky to get 7.

2. 9 or so

3. About 8 but it depends what you haul.

4. Depends on how its equipped but most weigh about 18K

5. No. I had a battery APU and at full power for AC it ran about 4 hours before it was dead

6. Depends on how good your batteries are. Usually about 2 hours