Winter solstice in Edinburgh.

Sunrise was at 8:42am: Sunset is due at 3:39pm, for a total of 6 hours and 57 minutes of daylight.

(Meanwhile, over on my blog comments earnest Australians keep trying to convince me that solar power is the solution to all our energy needs. Hint: up here, demand peaks at night—for heating—not during daylight hours for cooling.)

@cstross I think giant batteries to stick the wind into are more immediately interesting.

These guys seem to have the best tech for municipal container batteries:

https://cleantechnica.com/2022/09/28/ess-flow-battery-to-supply-200mw-2gwh-of-energy-storage-to-california-utility/

It's iron, road salt, water, and vinegar in a bunch of PVC pipes. It's all 1970s tech. Their patents are all around special filters (clever but still pool/aquarium level of complexity) that take it from a few hundred cycles to "the plumbing wears out long before the chemistry does".

@landley @cstross

Do you have perchance a source for that that strives to be more precise? (I am somewhat doubtful of this one given they say things like "positively charged liquid".) A cursory search yielded the company's statements and various news about some deployments in various stages.

@robryk @cstross does an hour-long interview with the CEO talking about the technology count? https://youtu.be/LPm3fgxbgg8

@landley @cstross

It might count for what I asked for, but not for what I meant: I wanted an independent source. Sorry for being imprecise.