@Willis I’m no expert but having dealt with a few installers recently the info I’ve received from them regarding battery size is that your battery should be at least that of your daily consumption. Mine is about 15kwh per day since I started charging my plug-in hybrid but if I put in an Heat Pump it will be much more. With regards to solar I would go for as big an array as possible, or you can afford. Solar panels are as cheap now as they have ever been so now would be a good time to get them.
The only person who got all his work done by Friday was Robinson Crusoe.
Anything i post over three lines long please assume it is an article lol.