http://reneweconomy.com.au/2015/batt...d-parity-33238
Germany hit grid parity with solar in 2011 and PV + battery storage is almost at parity now. Parity in the US is behind in most places because power is cheaper, and it is quite a bit more varied as solar resources and power costs vary widely. But, thanks to modest investments in terms of the size of the industries involved, renewables + storage parity will spreading to more an more locations.
At this point I don't really feel the need at all to argue for it because it's unstoppable. As soon as I clear my slate a little bit, I'm going to push to go into this. It will probably take 5+ years for the market to be more than a niche here, but that's fine. There's less competition and a bigger barrier to entry as it's more complicated.