This presentation suggests that BESS is used to keep the frequency stable, and remove huge price spikes: https://cigre.org.uk/web-cont1001/uploads/Integrating-

This presentation suggests that BESS is used to keep the frequency stable, and remove huge price spikes: https://cigre.org.uk/web-cont1001/uploads/Integrating-Grid-Forming-and-Grid-Following-Battery-Energy-Storage-Systems-into-Power-Markets.pdf https://cigre.org.uk/web-cont1001/uploads/Integrating-Grid-F... This suggests that there is evidence for these sort of issues somewhere else on the web.