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A comment on How cheap does solar power need to get before it takes over the world?. Parent comment

Re:How cheap does solar power need to get before it takes ov... by rm445 on Tuesday April 19, 2016 @01:43AM (#11525099)
The potential energy of a mass m at height h is mgh.

Play with this and you'll immediately see it doesn't seem useful. e.g. storing a 50-tonne weight at 10m gives you less than 1.5 kWh of energy.

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Re:How cheap does solar power need to get before it takes ov... by Gustomaximus on Tuesday April 19, 2016 @02:47AM (#11525265)
So probably needs in excess of 750 ton. And more likely twice as a house would more likely have a 5m 'chimney'. Clearly not viable. Thanks.
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