It will almost certainly be necessary to significantly overprovision both panels and batteries in order to avoid running out of power or needing to add more later. Hopefully the cost decreases will reduce the financial headache of this... time will tell.
I think there is an unrealized business model out there where a company builds, installs, and then maintains (incl. emergency fixes) solar+battery installs for a monthly fee, just like what you pay to the electric utility today. Such a business would hopefully achieve some cost savings by buying parts in bulk and be able to quickly fix issues by using similar system designs. It would be a bit like the electric utility, but they wouldn't own any grid or power plants.
I think there is an unrealized business model out there where a company builds, installs, and then maintains (incl. emergency fixes) solar+battery installs for a monthly fee, just like what you pay to the electric utility today. Such a business would hopefully achieve some cost savings by buying parts in bulk and be able to quickly fix issues by using similar system designs. It would be a bit like the electric utility, but they wouldn't own any grid or power plants.