I run a 460w worth of panels at my backup place, but something in the inverter or fridge conflicted and it roasted the compressor on the fridge and it is not that old. I have backup stuff that I have yet to assemble and am looking at around 2KW worth of panels ought to get a small place going OK.

Wind is sort of a bonus thing unless you have consistent wind. I found a wind turbine I want to try out someday, but it is not a high priority right now. I am thinking two 600w wind turbines ought to do a place pretty good.

That 20 batteries is a pretty big battery bank. I think you could run several days between generator charges, and the solar/wind might keep them up entirely depending on the weather.

You can always scale up to more panels if it seems like what you have is not enough.