An H2 filling station can be built in exactly the same way, all DC network, for a lot less cost. No storage battery needed, and H2 storage is 1/20th the cost of battery per kWh basis. The electrolyzer can put out up to 350 bar of pressure, meaning that only a single stage 2:1 compression will be needed to 700 bar standard pressure. Instead of parking spaces and charging sockets for 30 charging BEV's, only 1-2 H2 fillers (dispenser) will be needed, since a FCV will pull up and takes a few minutes to fillup and leave instead of having to park for much longer.

Good point, ai vin. However, look at each dedicated charger and meter and charging post per car per day...not cheap! What ever happened to just a single power cord or power socket per parking spot? Perhaps when that many cars are charged at one time, the power drain on a facility or on the RE infrastructure including battery storage is substantial, such that close monitoring is required.

By contrast, one single H2 filling post with one single nozzle can serve 100's of cars per day. Who could've predicted that BEV charging insfrastructure can potentially be more complicated and more costly than H2-filling infrastructure? Of course, I did, many years ago!

The buffering batteries can be recharged during very low consumption periods at lower cost.

So could H2 storage system.

Difficult to predict which technology will prevail for Extended range electricifed vehicles.

Both technologies could co-exist for a few décades.

BTW: Better late than never.
http://climatecrocks.com/2014/03/08/the-other-death-spiral-centralized-utilities-now-germanys-walking-dead/

"German energy giant RWE has taken a massive loss of €2.8 billion – it’s first loss in 60 years – after admitting it got its strategy wrong, and should have focused more on renewable and distributed energy rather than conventional fossil fuels.

RWE, like other major German utilities, has spent much of the past decade fighting against the country’s “energiewende”, the energy transition that is seeing it dump nuclear energy and transform the electricity system of Europe’s biggest manufacturing economy to one dominated by renewables.

Last night, Peter Terium, who has been CEO for less than two years, conceded that the company had got it wrong. He admitted that the change in electricity markets, which has seen earnings from conventional generation gutted by the impact of solar and wind energy, was “unstoppable”. It was now time to change strategy, and focus on what the electricity market will look like in the future."

New Battery Technology Could Provide Large-Scale Energy Storage for the Grid

The result is a battery that Cui and his colleagues claim is able to retain 83% of its charge after 40,000 cycles, which compares more than favorably to Li-ion batteries of 1,000 cycles.

http://spectrum.ieee.org/nanoclast/semiconductors/nanotechnology/new-battery-technology-could-provide-largescale-energy-storage-for-the-grid

However, no battery can provide the vast capacity for seasonal-scale energy storage like H2 can. This is because seasonal energy storage only goes thru 2-3 cycles/year, so the battery must be very cheap per kWh of capacity to do this. For example, H2 bulk storage using underground caverns only cost pennies per kWh of capacity that will last for decades if not centuries.

Let's say it costs 50 cents/kWh for bulk H2 storage, and one cycle per year for 50 years, then the storage cost per kWh of H2 will be only 1 cent. If 2 cycles/year over 50 years, then the storage cost per kWh of H2 will be 0.5 cent. No battery can be built for 50 cent to a dollar per kWh of capacity.