Keep the refrigerator on your backup plan
A refrigerator compressor can draw extra power when it starts. The station can supply a brief 4,800W surge, then up to 2,400W continuously across its AC outlets.
Save the battery for the food you need to keep cold
Leave the refrigerator plugged into the station and add a low-draw LED lamp if you need light. Keeping high-draw appliances off the same battery leaves more energy for cooling.
