alt Hacker News> BTW, it's about 7 units of wind energy to 1 unit of solar energy plus significant overcapacity plus increase of the grid transmission capacity plus additional measures for grid stabilization (like synchronous condensers) to get to a "fairly modest amount of storage."
No it doesn't. You install 12 hours worth of batteries at the factory and "there is no solar at night" is solved, and doing that is already cost competitive with coal on the majority of days.
The problem comes when generation is low not because it's night but because it's cloudy for an extended period of time. But that only happens a small minority of the time, and doesn't require you to burn fossil fuels the other 90% of the time.
You also don't need things like synchronous condensers when you're using a non-trivial amount of nuclear or hydro, neither of which is coal.
> Yeah, it's because of the above points.
Then how do so many other industrialized countries do it without that amount of coal?
Canada and Spain are each only ~22% fossil fuels. France is <5%. The UK is 31% and only 0.1% of that is coal.
> You install 12 hours worth of batteries at the factory
I literally laughed out loud, sorry. Providing baseload with BESS alone? That's rich. Literally. Extremely expensive. In addition to impractical amount of batteries it requires impractical overcapacity to compensate for seasonal variation.
> Then why is no other country burning that amount of coal?
China does about 30% of the world's industrial production and 40% of metal production, while having around 50% of world's coal power plants. They are working on it though. Many of their new coal plants are peaker plants.