if the same solar also had enough battery capacity, sure. But they do not, they still need to buy at out of solar peak and that just causes problems for both sides.

I think grid should start moving into selling storage as a service. Just put a bunch of bulk storage at every transformer station and buy solar from consumers at solar peak, sell them back say 80% of it (or whatever margin is required to pay for it) off peak.

That way utility no longer have to haul megawatts all the way from the power plant all the time, any peak can be hauled from the batteries and let the other types of power plant more time to spool up, and the grid is more resilient to outages (assuming you were lucky and battery bank local to you still had some charge

LFP chemistries are approaching ~$50/kWh, and CATL's sodium chemistry is supposed to be ~$40/kWh (per CATL); soon it will be more expensive to ship the battery storage than the storage itself.

"Watershed moment:" Big battery storage prices hit record low in China auction - https://news.ycombinator.com/item?id=44504630 - July 2025 (4 comments)

IEA: The battery industry has entered a new phase - https://www.iea.org/commentaries/the-battery-industry-has-en... - March 5th, 2025

Naxtra Battery Breakthrough & Dual-Power Architecture: CATL Pioneers the Multi-Power Era - https://www.catl.com/en/news/6401.html - April 21st, 2025

China Already Makes as Many Batteries as the Entire World Wants - https://about.bnef.com/insights/clean-transport/china-alread... - April 19th, 2024