[jillesvangurp]

No, they are doing that because they have a ten year head start on the rest of the world. The US & EU not having done their homework is entirely on them. The US is choosing to pump a lot of funding into fossil fuels instead. You could say that China is simply spending smarter.

The rest is just economics. We might suck at making batteries. But we suck even more at making new gas/coal plants or fueling those cost effectively.

Anyway, this stuff is being deployed by the hundreds of gwh per year now. Much of it in China but some non trivial amounts in places like Texas and California as well. As a result, the grid is actually getting more stable, not less stable.