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A comment on Electricity stored as temperature difference. Parent comment

Re:Electricity stored as temperature difference by pslam on Friday November 21, 2014 @09:16PM (#8644462)
That's got to be a typo, or this story is burying the lead. Is pumped hydro really 30% more inefficient than even that figure? Because that would mean it's almost entirely a waste of money for anyone to store energy by this or other means.

If it's $103/GWh, on the other hand, then we're talking about only ~10% overhead on costs.

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Re:Electricity stored as temperature difference by al_bundling on Friday November 21, 2014 @10:29PM (#8644619)
> Is pumped hydro really 30% more inefficient than even that figure?

The article states 30% cheaper, not 30% more efficient.

> If it's $103/GWh, on the other hand, then we're talking about only ~10% overhead on costs.

The article states $103/kWh, not per GWh. To calculate overhead costs you would need to know life cycle costs which were not disclosed.

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