It's interesting to note...
... that as many states are making their plans to mandate renewable usage, many of America's "visionary" corporate leaders are planning for self-contained redundant power supplies for their facilities. Clearly, they don't have as much confidence in this paradigm as Chris does.
As I've said before, we're putting the cart before the ox; we need to be investing in R&D on storage technologies before plunging large portions of our country into darkness.