IT Notices

ISO New England will be performing a maintenance outage of CROW Outage Scheduler in Production environment on Tuesday, September 15, 2026 between 13:00 to 19:00 hrs.

2026-09-14T18:16:09Z

When: Tuesday September 15, 2026 1:00 PM

ISO New England will be performing a maintenance outage of CROW Outage Scheduler in Production environment on Tuesday, September 15, 2026 between 13:00 to 19:00 hrs. During this time, Production CROW web application and web services will be intermittently unavailable.

ISO New England will be taking a maintenance outage of the NEXTT application on Friday, September 11, 2026, from 15:00 to 17:00 Hrs

2026-09-11T16:29:17Z

When: Friday September 11, 2026 3:00 PM

ISO New England will be taking a maintenance outage of the NEXTT application on Friday, September 11, 2026, from 15:00 to 17:00 Hrs. The NEXTT application will be intermittently unavailable during this time.

On Tuesday, September 15, 2026, power system conditions allowing, ISO New England will update the EMS/Market power system model.

2026-09-10T22:15:11Z

When: Tuesday September 15, 2026 1:20 PM

On Tuesday, September 15, 2026, power system conditions allowing, ISO New England will update the EMS/Market power system model.

The update is scheduled to start at approximately 13:20 and last until approximately 15:45.

Participants can expect a loss of 5-minute Real Time LMP and RCP postings to the ISO's website, and stale DDP signals to their Electronic Dispatch RTUs during this time period.

Updated DDPs will resume upon completion of the EMS outage at approximately 15:45.

External market applications will remain open during the outage

ISO New England will be performing a maintenance outage of the CROW Outage Scheduler Sandbox on Wednesday, September 9, 2026, from 11:00 to 14:00 Hrs

2026-09-08T22:29:52Z

When: Wednesday September 9, 2026 11:00 AM

ISO New England will be performing a maintenance outage of CROW Outage Scheduler in the Sandbox environment on Wednesday, September 9, 2026, from 11:00 to 14:00 Hrs. During this time, the CROW Sandbox web application and web services will be intermittently unavailable.

ISO New England will be performing a maintenance outage of CROW Outage Scheduler in Production and Sandbox environments on Wednesday, September 2, 2026 between 19:00 and 21:00 Hrs

2026-09-02T18:37:52Z

When: Wednesday September 2, 2026 7:00 PM

ISO New England will be performing a maintenance outage of CROW Outage Scheduler in Production and Sandbox environments on Wednesday, September 2, 2026, between 19:00 and 21:00 Hrs. During this time, the Production and Sandbox CROW web applications and web services will be intermittently unavailable.

ISO New England will be performing a series of software upgrades on the Limit Exchange Portal (LEP) Sandbox application from 9:00 on Monday, 08/31/2026 through 17:00 on Friday, 09/04/2026

2026-08-29T00:20:30Z

When: Monday August 31, 2026 9:00 AM

ISO New England will be performing a series of software upgrades on the Limit Exchange Portal (LEP) Sandbox application from 9:00 on Monday, 08/31/2026 through 17:00 on Friday, 09/04/2026. The LEP Sandbox application will be intermittently unavailable during this timeframe.

ISO-NE will be performing routine maintenance on the Foreword Capacity Tracking System, WPF and SPF System Environments and the eMarket, eFTR, DRMUI, Wind Integration, and WPF system Sandbox environments on from 14:00 to 16:00.

2026-08-27T00:00:18Z

When: Thursday August 27, 2026 2:00 PM

ISO-NE will be performing routine maintenance on the Foreword Capacity Tracking System, Wind Power Forecasting System Production, and Solar Power Forecasting System Environments on 8/27/26 from 14:00 to 15:00 and the eMarket, eFTR, DRMUI, Wind Integration, and Wind Power Forecasting system Sandbox environments on from 15:00 to 16:00. Foreword Capacity Tracking System, Wind Power Forecasting System Production environments, Solar Power Forecasting System production Environments and eMarket, eFTR, DRMUI, Wind Integration, WPF and SPF sandbox environments will not be available during this time.

ISO New England will be taking a maintenance outage of VAR Capability Tracking (VARCT) on Wednesday, August 26, 2026, from 18:30 to 19:30 Hrs.

2026-08-26T22:40:42Z

When: Wednesday August 26, 2026 6:30 PM

ISO New England will be taking a maintenance outage of VAR Capability Tracking (VARCT) on Wednesday, August 26, 2026, from 18:30 to 19:30 Hrs.

During the outage, users will have intermittent periods of being unable to connect to VARCT.

ISO New England will conduct an outage of Sandbox Settlement Applications from August 25, 2026 14:00 to August 26, 2026 23:59 hrs. for software maintenance.

2026-08-25T22:14:45Z

When: Tuesday August 25, 2026 2:00 PM

ISO New England will conduct an outage of Sandbox Settlement Applications from August 25, 2026 14:00 to August 26, 2026 23:59 hrs. for software maintenance.

During the outage users will not be able to connect to the following Sandbox SMD Applications: Internal Transactions, Submit Meter Reading, Submit Peak Contribution, Submit Monthly Regional Network Load, and Financial Assurance Management.

ISO New England will be performing maintenance of Unit Dispatch Scheduling software in Production and Sandbox environments on Wednesday, August 26, 2026, from 11:00 to 16:00 Hrs

2026-08-25T00:51:35Z

When: Wednesday August 26, 2026 11:00 AM

ISO New England will be performing maintenance of Unit Dispatch Scheduling software in Production and Sandbox environments on Wednesday, August 26, 2026, from 11:00 to 16:00 Hrs. During this window, there may be missing 5-minute locational marginal prices (LMPs) and Regulation Clearing Prices (RCPs), and generating units may receive stale DDPs/DNEs to the RTUs.