Originally Posted by Danno
Originally Posted by OVERKILL
Originally Posted by Cujet
What percentage of need can the big battery store?
I believe 6 minutes IIRC.
If its only 6 minutes, what's the real story here?
It can step in quickly, locally, to correct deviations in frequency, which happen because of the amount of inertia that's been retired and replaced with wind/solar, which don't have any. So while a turbine will step in to make the correction, this unit can "snipe" corrections and contribute, quite briefly, until the other unit takes over.
When the large coal unit tripped and another one 1,000 miles away had to step in, the battery made a small correction (which got all sort of press) to frequency, which is what it is on contract for. It also depleted something like 60% of its capacity in that short window, meaning that immediately after, had their been another blip, it would have had basically no capacity to do anything.
