Comment by sanderjd

I don't know how that utilization rate and electricity share is being calculated, but my guess is that this is because nearly all current batteries are 2-hour or less, so even if they fully discharge each day, there is a pretty low upper bound on their utilization.

But they don't shine in that sustained discharge use case. They are most useful for helping manage small fluctuations, and for time shifting energy to the daily peaks.

So I just think utilization is a less useful way to think about battery storage. Unless you're comparing them to gas peakers specifically. (That is, separating out the peakers from base load gas.)