[johncolanduoni]

I’ve never seen anybody give an estimate for the cost of storage required to fully convert the grid of e.g. the US that wasn’t obviously astronomical and not something the utilities could afford the capital for. If you’ve seen different please share.

[triceratops]

I still don't see numbers. What is this "obviously astronomical" estimate? And how does it compare to nuclear, in any form?

[idiotsecant]

Battery storage ranges from $150 to $300 / kwH capacity. The entire grid would need something like 5twH of capacity for an 8 hour ride through. I want you to carefully consider those prefixes and the vast, vast Gulf of space between them.

[ericd]

Nah, you can buy retail packs for less than $300/kwh now, I installed some recently. Commercial installs in China are reportedly hitting like $60 installed.

Also, 4 hours is the target Jigar Shah talks about for getting solar to a load factor roughly equal to most thermal plants.

Also, I believe that’s 4 hours on the nameplate of the variable generation, not 4 hours on the entire grid load. People generally aren’t advocating for going fully variable generation.

[ViewTrick1002]

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 You are relying on information that is many years out of date. Your upper span is soon a magnitude out of date.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!!!!”