One of the big questions that consistently comes up in any discussion of converting the US to renewable energy usage is whether or not our grid is capable of supporting the transition. We are all well aware that both solar and wind power are intermittent and do not provide round the clock power, so is our grid, our technology and the relative costs of energy storage strong good enough to keep our energy grid consistently supplying us with power. The short answer is yes, and this nothing new. The National Renewable Energy Laboratory (NREL) published a study all the way back in 2012 concluding that the Grid was ready for prime time, since then the technology and the economics have only gotten better.
If you have the wherewithal to read the full report, then by all means, you can find it here. If you want a good summary and analysis of it without all the detail, then Jacques Leslie wrote an excellent opinion piece at Yale 360 The Energy Secretary Is Wrong The Grid is Ready for Renewables.