>In fact, tiny amounts of storage may do the trick if the grid is
large enough -- and making the grid large enough is not that
expensive. We may already have in place what we need for a completely
renewable grid.
>The 75-hour figure came from studies of single, isolated wind farms.
But as you add wind farms, the odds of two wind farms being down -- or
low producers at the same time -- drops.
>I came across confirmation by accident: a Vehicle to Grid study (PDF)
that evaluated data from eight sites showed that storing just 36
minutes of nameplate capacity would allow the widely dispersed farms
to meet a firm power commitment ~90% of the time.
Read the rest on Grist:
http://gristmill.grist.org/story/2006/12/17/212637/60
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