I run a 100ah LiFePO4 battery inside a trolling battery box. Installed on the surface of my battery box is a 500W Inverter with 2 AC outlets. On the side, I have it connected to a remote battery shunt that sits on my center console to monitor the state of charge, watts used, and how much is being charged/discharged under load/without load.
Has worked well for me for me as I only use 3 big items on it: Diesel Heater, Portable Freezer, and a 500W Bluetti Power Station.