ISO New England will update the EMS / Power System & Market Model on Tuesday, May 19, 2026. The update is scheduled for approximately 13:20-15:45 Hrs. During this time period, participants can expect the loss of 5-minute Real Time LMP and RCP postings to the ISO's website, and stale DDP signals to their Electronic Dispatch RTUs. Updated DDPs will resume upon completion of the EMS outage at approximately 15:45 Hrs. External market applications will remain open during the outage.
