And, also, likely lifestyle changes as well, would be my guess. I mean, My normal "house run rate" for electricity during this time of year, is somewhere between 24-35 kWh, but if I go into " High conservation mode" I can get that number lower... all the way down to basically just powering my 2 refrigerators and a few light or something like 12-15 kWh a day. Thats not using washing machine or dishwasher, or oven, etc.
I would want at least 50% more solar and 1-2 more batteries, along with a backup generator (just in case) if I was going to "try" to completely disconnect the grid, and that doesnt even account for the fact that I am fairly sure that I cant do that, even if I wanted to.