The problem with photovoltaics is they are very expensive to install and they will basically never offset the grid electricity costs in states like Texas, Oklahoma, Kansas, etc. My electricity cost is about $0.14/kWh max. And solar panels can easily get to a $50k+ project. It will take me over 20 years to get even with the grid. I'd better invest in some efficiency updates first. Of course, in Bay Area or HI, at over $0.30/kWh, solar panels start making a lot more sense.
My solar installation, 32 panels and two Powerwalls with associated electronics and installation cost, started making money for me on Day One. I sold some good solid, conservative, dividend-paying mutual funds to pay for everything. The income I lost by no longer having those funds is less than the reduction in my electric bill. I still pay $26.25/month to be connected to the grid, for load balancing. And even with that, my disposable income went up.
No twenty-year or thirty-year payoff period. Real money profit starting on Day One.
I just found out that there was a 5-hour power outage on my block the other day. Neighbors two houses down and two houses up from me experienced it. I didn't even notice! The bonus perk of having solar and Powerwall is that my home keeps running. And since I switched to fiber optic from cable, my internet no longer goes down when there's a power outage.
More and more people in places where the economics of solar are marginal will install it just to be insulated (pun intended!) from power outages. And that, too, will help the grid survive growing demand.
Not every place is suitable for solar. But just as there are not enough EVs being built for everybody to buy one tomorrow, so too not enough PVs are being built for everybody to put up PVs tomorrow. Both changes are gradual: The number of EVs grows as they are built and people with charging opportunity buy them, and the number of PV installations grows as people living in suitable places buy them. And meanwhile the infrastructure and the costs come down, more EVs are built and sold, more charging infrastructure is built, and PVs become cheaper and more efficient, making them available and feasible for more people.