Which is cheaper, a peaker plant after the transmission line hitting peak capacity, or increased transmission line capacity for a small percentage of the time?
Now it's just battery storage instead of natural gas peaker plants. You can still smooth out the transmission line capacity with downstream storage.
Or have we already done that to the max with peaker plants and now transmission lines are running at their capacity 90% of the time? I haven't read the numbers in a while, it used to be really bad!