What Size Battery for a Dometic Fridge?

Quick estimate

A Dometic-style fridge may average 300-700Wh per day depending on size, ambient temperature, set temperature, ventilation, and how often it is opened. A 100Ah LiFePO4 battery gives roughly 1,100-1,200Wh usable.

Recommendation

For one fridge, lights, and phone charging, 100Ah is a good minimum. For hot weather, two-day no-drive trips, laptops, Starlink, or winter accessories, 200Ah is a better target.

Size my fridge battery