Can you warm up with food with no inverter?

Lots of 12 volt appliances available at some truck stops, or Amazon.
Burton Stove is one example.

 

Wrap tight in foil set on turbo wala

 

Wrap it in foil and put it on your turbo or on you exhaust when you do a regen.

 

There is always armpit heat.

 

I used to heat up my food on the manifold, then Burton came out with the lunchbox heater. That was like a dream come true.

 

I can vouch for Burton quality. Found at TA.
It will probably take long. But it will work. I’d say start it in the morning. Should be good at lunch.

 

The lunch box ovens work for that.

I've known a few people to keep a small grill in the truck. Steak, pork chops, brats, whatever, whenever you want. I've seen camping grills that use the small propane bottles, with a burner on the side so you can use pots or pans as needed.

 

I used a lunchbox oven for everything for years! They work great! I even used to make grilled cheese in it! Lol