have you looked at the mini split units by EG4 that take MC4 connectors straight in from a bank of PVs? it might be cheaper than you think.
Refrigerator is an almost ideal use case because newer ones are inverter-drive and run around the clock. And inverter drive means it runs off DC at some level.
A fridge is the one thing I really want to have work at some degree in a grid outage. Everything else I can work around pretty well.