Michael Ross said (in part):
> The grid is a super storage medium. If we were more interconnected
worldwide, then a series of large solar arrays could do it all. You just
need enough of them facing the sun at any given time and then batteries can
take their better place as mobile storage. This arrangement beats the heck
out of digging all the copper and cobalt needed for stationary storage.
Unfortunately not practical.  Transmission line losses if nothing else would 
rule it out.  There are other issues as well.
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