Date: 2021-04-25 05:08 am (UTC)
andrewducker: (Default)
From: [personal profile] andrewducker
The amount of energy necessary to lift one ton by 1m is very close to that in a single AA battery.

You need to be moving tens of thousands of tons hundreds of metres to get a useful amount of energy. Dinorwig uses a lake with 9 million tons of water in it, and a 500m drop.

I'm sceptical that they can scale up to anything like the levels they need to to be useful.
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