Solar installed capacity has increased by ~40% year over year since 2009. Utility solar has gone up 55x from 893 GWh to 52,958 GWh while rooftop solar has gone up 36x from 2,092 GWh to 77,097 GWh. This trend has continued year over year even up through the first half of this year.
https://en.wikipedia.org/wiki/Solar_power_in_the_United_States
Correct me if I'm wrong, but if this +40% yearly cumulative increase continues, solar will be a quarter of our electricity generation by 2027, in just 9 years? It looks like this is being sorted out by the market plus some state level tax subsidies.
With the grid getting cleaned up fast, the major issue to address is getting people into electric cars.