Christopher Mims for Quartz:
All this will encourage yet more homeowners, businesses and communities to buy solar panels as power from the grid gets more expensive. You can see where this is going: The EEI says it could become a feedback loop that eventually wrecks the whole US utility industry, or at least greatly diminishes it.
Eventually, people will only be using the grid as a backup, combining ever-cheaper solar panels with ever more affordable batteries to store the power for when the sun isn’t shining. That’s called an energy transition.
The gist is that as solar panels continue to get cheaper, more people will install and use them. This, in turn, will cause the traditional electric companies to jack up rates to offset the decreased usage (they have pay off long-term plant investments). And that, in turn, will cause more people to buy solar panels.