I am curious to know how this analysis factors in the need for storage of wind/solar for periods when it is not windy/sunny. When I looked through the report, I only saw this.<p>> <i>We are already seeing combined renewables-plus-storage plants win competitive solicitations and capture some of this value in high solar-and wind-potential regions (empirically, this appears to add roughly $4-8/MWh to renewable energy costs). We expect the trend to continue as battery prices slide down the learning curve.</i><p>My interpretation is that wind/solar plus storage is more expensive, which undercuts competitiveness outside of the most windy/sunny locations. I am as excited as anyone about new developments in storage technology, but it seems like it's still a significant challenge.<p>Was it discussed elsewhere, or is anyone else aware of other information regarding the combined cost? It seems like this one statement somewhat undermines the conclusion, unless I'm missing something.