running a fridge off vehicle battery

I'm planning an extended road trip this fall and want to go with an in-cab fridge instead of a cooler. Interested in your experiences hooking one up to the truck battery (or a secondary one) so it stays on. Any kits out there for doing this, or is it a fairly straightforward DIY thing? Any other thoughts? TIA

 

https://www.tacomaworld.com/threads/powering-a-fridge.758173/

 

If you are driving every day just plug it into a constant 12v power source, pretty much every portable fridge has voltage protection so it won't kill your battery over night. Now if you are parking your truck for a few days you will need a different source of power for the fridge.

I ran one of these to the bed of my truck and have run my fridge constantly on a 9 day trip just with the OEM truck battery but everyday I was driving at least 2-4 hours and that kept the battery charged.
https://www.genesisoffroad.com/products/12v-power-outlet

 

I’ve used a Dometic PLB40 LiFePo battery pack charging from in-cab 12V to run my ARB 37Qt fridge for trips lasting weeks.

The battery gives an “accumulation” of power that allows the fridge to keep running as needed for up to a couple of days in camp before the truck was on the move again to charge it up. Doesn’t stress the truck’s battery at all. Works great, although that battery ain’t cheap.

 

Get a small power station

something with 500wh should be fine for a single fridge, and can recharge easily off the 12v outlet

you would probably be fine with 250wh honestly
If you think you’d use it for more, go with a 1kwh system, they are very useful for power outages, etc
Stick with a lifepo4 battery, longer lasting and less dangerous
I like Ecoflow, but Bluetti, jackery and others are all good too