Welcome Digger
You can either build a power system or get a so-called solar power station. There are advantages to both. Something like a Bluetti or Jackery is basically a self contained system including a battery charge controler and inverter. They are a bit expensive. You can make your own power system for much cheaper. Also with a Bluetti/Jackery if one component goes bad, the whole thing must be replaced. If you built your own system, then you could replace just the component that went bad.
I went to a camping store and told them my goal was to be able to run a small air fryer and a 12v refrigerator, not at the same time They suggested a 2000w sine inverter and use it while the vehicle is running. I have only basic electric comprehension. I thought it was an attainable goal, but the more
Many passenger cars do not have a large enough capacity alternator and battery setup to make this a viable solution. What happens is that doing that will wear out your alternator long before it’s normal wear cycle. . I know one car meachanic I met recently who does that in his Honda Element to recharge his household items. After his first alternator died he replaced it with one from an auto parts store chain that sold an alternator with a lifetime warranty. His alternators continue to wear out early and he continues to replace the alternator. But here is the catch to that scheme, he is a professional auto mechanic so it cost him nothing but his time to swap alternators. He is not stuck by the side of the road needing a tow and he is not facing labor charges to replace the alternator. So kiddies..do not try this trick without adult supervision! Meaning if you do not have the ability to swap out an alternator find some other way to cook your food besides using the alternator in a passenger car.
