One Jack Rickard, RIP, who was quite an opinionated jerk imho, coined the concept of "selfish solar." The idea was that solar was on its way to becoming so cheap that one should just install enough panels and batteries such that you basically never use the grid, it's just a backup for uncommon events. Basically grid use drops to that 1 or 10% of the time the sun doesn't shine for days. I think we are there on the panel side, and will be there soon on the battery side. Selfish solar could make sense but it would change the economics of solar and electric grids substantially. If everyone went selfish solar, grid electricity and infrastructure would become prohibitively expensive. We are decades away from that or at least one decade (IMHO), but we need thoughtful regulation on this point. Will we get it? I suppose time will tell.
That might work in southern latitudes where the seasonal change in solar irradiation isn't much different. In the North, like in Canada, there's just not enough solar in the winter. We really need a way to store excess solar from the summer into the winter. Like on the scale of a 500 gallon propane tank.
doing fine @ 45°north thank you, and know people living and making all of there income from solar
even further north, with I might add equipment that is now outdated, but was much more expensive
than what is availible now, which has almost doubled in efficiency, and is less than half the price, retail, with palet loads becoming bizarly
cheap.
When combined with a new build semi passive solar house, conventional heating systems can be omited
entirely.
There is a comming "solar divide" ....those who pay energy bills, and those that dont.
