I think solar set-up is just about perfect, and by augmenting it with your generator it will be even better. I’m am very impressed that the power-bank would be able to run your fridge for 3 full days,24 hours a day before running out of juice. If you put a frozen litre bottle or two, of water in the fridge you could probably get 7-8 days by running the power bank just 12 hours a day instead of 24. Thats the sort of thing I do in hurricanes.