On 9/1/21 10:20 AM, Peri Hartman via EV wrote:
It could be that the grid can't handle any significant generation of
PV energy. If it could, economics would dictate that excess PV energy
would be sold, not shut down.
The other possibility is this will produce an incentive to create
hydrogen storage for excess PV energy. In my opinion, that's an
excellent use for electrolysis plus either hydrogen turbines or fuel
cells. Note, for this application, the hydrogen does not need to be
compressed.
Speaking without great familiarity with storage costs, I think short
term battery storage is most likely to solve the problem. Battery stored
energy can get to the grid for only about a 20% loss while hydrogen, as
I understand, will be FAR less efficient.
Typically, over production of either wind or PV can be managed with
storage of well under 24 hours. We can look forward to continued
battery cost reductions, especially from Tesla.
For longer term storage, hydrogen might find a niche.
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