It's best to have a large solar panel array AND and large LiFePO4 battery bank...AND run efficient items like the solar refrigerators/freezers I got, they are energy stingy.
Build your system so that you can get by even if EVERY day from now on will be overcast... you only get 10-20% of your panel rating in such conditions and only for perhaps 6hrs a day at most so OVERBUILD. 20kw of panels will give you 2-4kw for 4-6hrs a day 20kw of panels are selling for roughly 12,000 dollars currently (Amazon) 100kw of panels for roughly 60,000.. Of course you need to live on a farm or something to put out so many panels.. I have 40 acres.
If you don't build for the worst possible case of every day being overcast you will be disappointed with your results.
And if you get clear bright days an overbuilt system can really get you some power... say 20kw+ on a bright day, you can run a clothes dryer during such times... but I'd still rather store the extra and hang the clothes out :-)
Be aware that the copper wiring for a large system is pretty costly.. 2 aught copper ain't cheap and it's best to run a 48VDC system so you can use smaller/cheaper wiring :-/
Also get enough AC charge capability so if your power from the grid is intermittent you can top up your battery bank... but don't depend on that, again.. OVERBUILD!
These are the panels I am now buying to put in storage.. unconnected in case of EMP, they should survive if not connected to wiring... I have diodes to replace those if the ones on the panel were to blow.
I have about 100 of these and more coming... here they are, it's a good buy for 100watt 9bb monocrystalline panels with free shipping.
