alt Hacker NewsScaling is a problem.
How many batteries do you need to power, say, entire Scandinavia during winter? That would be a lot of lithium, btw.
"Dunkelflaute" periods when it is dark and no wind to run the wind turbines are common in northern winters, IIRC the longest one a few years ago was 12 days long.
Which means that in order to have a reasonable buffer against it, you would need enough batteries to supply the entire region for three weeks. Not going to happen, unless we discover some much more efficient class of batteries.
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That 12 day event was a regional event in Germany, there was still lots of wind in the North Sea. And sun & wind didn't drop to 0, it dropped below 10%.
Dunkelflaute's are a German phenomenon: the standard pattern in most of the world is that the high pressure systems that suppress winds are generally sunny. And the high elevation areas in Germany are sunny during a dunkelflaute.
IOW, batteries aren't the only answer required to cover a dunkelflaute.
boy am i tired of hearing that Dunkelflaute word as if its some kind of gotcha. Even ignoring the fact that you can continue to source power from other geographies during a localized phenomenon..... Just burn gas in peaker plants for the few days a year that this happens. That small amount of emissions wont matter for the next 50 years of decarbonization, after which we'll likely have plenty of other options.
The absolutism in all these arguments is so tiring, as if its not 100% perfect solution for 100% of every imaginable scenario than its no good. 95% reduction over a year would be astounding, we would have won the climate battle.
Fission reactors in multiple European countries had to shut down due to heatwaves. And in Scandinavia (Sweden), they are "routinely" stopped for scheduled and most importantly unscheduled maintenance.
But those don't have scary sounding German names, I guess.
Sodium batteries are cheaper for storage and does not require any rate/expensive minerals, just scaling up production. Then in Scandinavia the main problem in winter is heating and using heated water as a battery is already a thing. Then producing amonia or even carbon fuel from atmosphere for energy-dense storage will be viable option in 10-20 years. And of cause Norway and Sweden can have massive hydro for energy storage.