Energy Time Shifting - Phases of Energy Storage Development

The first market where we're already seen battery s and other technologies being deployed is for operating reserves. And then as we get more solar on the grid, the solar tends to narrow the afternoon peaks in the us. So those narrower peaks are more attractive for batteries because the durations are shorter. The last phase is malti day seasonal capacity, beyond ten or 12 hours of duration out to hundreds hours of duration. That's a little unclear what the size of that market is. In the paper, we said be anywhere from zero to hundreds af gigowats.