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Hi,
They are working on using things like molten salts to store heat for a longer term buffer. Wind can blow all the time (in some places) and waves and geothermal are pretty darn constant. Biogas is easy to store, and easy to use for peak loads -- like they are doing in Germany.
Having the energy distributed over a wide area is actually a good thing, and all we really need is a better "smarter" grid.
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