This portable power bank has been fantastic and is super flexible. It runs that big ole fridge easily, with more than enough power for other goodies too. Stay tuned for a more in-depth build video, but to get you started, here are the main components I used:

Battery: https://amzn.to/3bU1SsP
DCDC Charger: https://amzn.to/3P9A6qn
Terminal Blocks: https://amzn.to/3RdpQzf
Fuses: https://amzn.to/3yIC4sp
12V outlet: https://amzn.to/3utGBN7
ARB/Dometic Fridge outlet: https://amzn.to/3ym6Jur

BONUS: Here's the Dometic fridge I'm running: https://amzn.to/3NMozMX
and the 100W solar panel: https://amzn.to/3anUC81

Don't hesitate to let me know what questions I can help you with if you're building your own!