A typical fridge can consume around 350 watts on startup. That’s like having three athletes working for you. Continuous consumption is usually around 150 watts. You still need the equivalent of three people: one working at any given time while the other two are resting.

That’s why generating power for a fridge manually is completely impractical. This topic does not meet the bar for a productive discussion. I don’t think we can have a civil and and productive conversation here.

You are already aware of all the options: batteries, inverters, and solar panels. If you cannot place solar panels somewhere, then you will simply need more batteries. There is nothing anyone can really tell you beyond that. There are no hidden good ideas here.