I see the issue. You are relying on information that is many years out of date. Your upper span is soon a magnitude out of date.

https://www.ess-news.com/2025/06/26/china-energy-engineering...

Also please give a source as to why the US grid would need 5 TWh of battery storage. So we know it is not simply a number you invented out of thin air to say ”impossible!!!!”