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Rooftop solar panels are flooding California’s grid. That’s a problem. As electricity prices go negative, the Golden State is struggling to offload a glut of solar power (wapo.st)
submitted 6 months ago* (last edited 6 months ago) by silence7@slrpnk.net to c/energy@slrpnk.net
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I'll note that right now, this is a seasonal issue, associated with moderate springtime temperatures when there is a lot of sunshine available.

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[-] BastingChemina@slrpnk.net 4 points 6 months ago

There is a reason why energy based energy storage is not more developed right now (with the exception of Pumped-storage hydroelectricity). It's not very dense at all.

A 15 tons block of concrete that goes up 100m can only store 4kwh of energy. A 4.5kwh battery cost around 1600€.

Gravity based energy storage seem simple and elegant at first but you go into the details you realized that is far far les efficient than regular chemical battery. Unfortunately.

this post was submitted on 22 Apr 2024
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