You’re correct I had misremembered and had to revisit my sources. I was not able to find sufficient data support my claim that batteries have any inherent delay.

However, In Australia which gets relatively consistent wind and solar I think it is more beneficial to invest in batteries.

Conversely in North America where the efficacy of wind and solar vary significantly by season and local climate, it is necessary to oversize generation and use batteries needed in order to ensure grid stability during periods of high demand and low supply.

This is attainable on the small scale and absolutely could be used to stabilize a grid with a steady backbone provided by something like nuclear or natural gas.

However without the stabilization of another steady source the cost quickly becomes unfavorable if you wish to maintain absolute grid stability as excessive over building is necessary with the highly volatile production.

I do think this is shifting more in the favor of battery storage with every new advancement.

My apologies for my previous misinformation it has been a long time since I’ve visited this topic.