There are no commercially viable ways to store grid scale energy. And that is what's holding the deployment of solar "in place of" coal. As a supplementary system, it's good. As a replacement, not yet.
New coal isn't commercially viable either - the $700M subsidy discussed in this thread is proof of that.
Other countries have already been successful in entirely replacing coal with renewables. America would be well advised to follow suit rather than wasting money on trying to hold back the tide.
Other countries have already been successful in entirely replacing coal with renewables. America would be well advised to follow suit rather than wasting money on trying to hold back the tide.