The BIGGEST problem with clean energy

I'm glad you included the round trip efficiency numbers in your report, especially the one Toyota probably was likely not so keen on you revealing, that of hydrogen as a storage medium at 25-45%. nearly the worst of the systems you have covered here. Hydrogen storage in places where we now store natural gas brings to mind the year long leaks the SoCAlGas had in Porter Ranch CA. Hydrogen is the atomic great escape artist when it comes to containment, and hydrogen embrittlement of steel pipes makes it unsuitable as a direct natural gas replacement, I'm sure you know. And schemes that cost less than natural gas itself for the production of hydrogen are going to be fighting that battle to become viable in the marketplace.
 I do think you have so far missed what all the battery cars being sold today will yield in terms of storage. 
I mean home storage for that time fairly soon when the percentage of BE vehicles is high enough to utilize V to G. That shrinks the necessary amount of grid enhancement to localities where the increases in energy use from EVs will be coming. There will be some places for HFC being the right tech, and Toyota already has some in place. But the Mirai is not the answer for our highways. A mere doubling of the energy density of the lithium ion battery per kg and there will be not enough room for more COP vessels in the Mirai to match the range of a Tesla Model 3 Long Range like mine, which already has 350 miles of range to the Mirai's 400. My car can seat 5 and that third tank that gets it to 400 miles eliminates that seat in the equal sized Mirai.
 The hydrogen business model is far too close to that of the "energy" companies intimate to our economics at all levels of our present society.  I want the right mix of storage modes for the most rapid, but cost effective moving to renewables and away from fossil hydrocarbons as fuel that we burn,  and that may not be the one that saves the business of industry that got us to this state of affairs.