Quote:
Originally Posted by ZenGum
There is a difference, in that with hydrogen, we put the energy in there deliberately, but with the others it was there already, but ... so what?
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The fuel used, and pollution created, to store energy in the form of hydrogen, is higher than if that fuel was used to do the work in the first place. Using hydrogen as a storage medium for photovoltic might work out someday, but rfn it's not practical and not done. Don't forget you need a hellatious compressor to concentrate that hydrogen, and compressors are super energy hogs.