When I last had a multi-day outage, we hooked our generator up to our freezer. We would run for one hour, then off for 3-4 hours. Also good schedule for making more coffee, charging phones, etc.

It’s likely, freezers don’t operate continuously.

It’s not a few hours. It’s all sunlight hours plus a few hours from the battery per day

TFA's system, yes, but OP just bought a battery and is now considering adding a solar system.