ISO-NE Website
As the RTO for New England, ISO-NE is responsible for operating wholesale power markets that trade electricity, capacity, transmission congestion contracts and related products, in addition to administering auctions for the sale of capacity. ISO-NE operates New England’s high-voltage transmission network and performs long-term planning for the New England system. ISO-NE serves six New England states: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont. New England’s all-time peak load was 28 GW in summer 2006. ISO-NE is interconnected with the New York Independent System Operator (NYISO), TransEnergie (Québec) and the New Brunswick System Operator. ISO-NE imports around 17 percent of its annual energy needs from Québec, NYISO, and New Brunswick. In ISO-NE’s annual Forward Capacity Auction (FCA), both generator and demand resources offer capacity three years in advance of the period for which capacity will be supplied. The three-year lead time is intended to encourage participation by new resources and allow the market to adapt to resources leaving the market. ISO-NE relies primarily on natural gas-fired and nuclear generation, accounting for 49% and 31% of the systems supply in 2016, respectively.
List of Orders Click on the categories below to view additional information.
Docket No. Date Issued Company Title EL26-45-000 09/10/2026 ISO New England Order on Show Cause Proceeding and Directing Compliance Filing EL26-72-000 06/18/2026 ISO New England Order Instituting Proceeding Under Section 206 of the Federal Power Act | News Release | Fact Sheet | Presentation EL25-106-000 01/22/2026 New England Power Generators Association v. ISO New England Order Granting Complaint in Part and Denying in Part
Docket No. Date Issued Company Title ER20-2054-000 09/18/25 ISO New England Inc. Order on Formal Challenge
Docket No. Date Issued Company Title EL23-16-000 12/19/24 ISO New England Order on Complaint ER24-2584-000 11/21/24 ISO New England Inc. Order Accepting Tariff Revisions, Terminating Show Cause Proceeding, And Directing Informational Filing ER24-138-000 07/25/24 ISO New England Inc. Order on Compliance Filing
Docket No. Date Issued Company Title ER23-739-000 10/19/23 ISO New England Inc. Order Accepting Tariff Revisions EL22-63-000 09/21/23 ISO New England Inc. Order on Show Cause Proceeding EL23-89-000 09/21/23 Brookfield Renewable Trading and Marketing LP v. ISO New England Inc. Order Granting Complaint ER22-2467-000 06/15/23 ISO New England Inc. Order on Compliance Filing ER22-2357-000 06/15/23 ISO New England Inc. Order on Compliance Filing EL22-42-000 02/16/23 RENEW Northeast, Inc. and the American Clean Power Association v. ISO New England Inc. Order Dismissing Complaint
Docket No. Date Issued Company Title EL22-31-000 07/28/22 Northern Maine Independent System Administrator, Inc. v. ISO New England Participating Transmission Owners Administrative Committee Order on Complaint ER22-707-001 06/16/22 ISO New England Inc. New England Power Company d/b/a National Grid Order Addressing Arguments Raised on Rehearing
2021
Docket No.
Date Issued
Company
Title
ER21-787-003 09/23/21
ISO New England Inc. Rehearing Work
Order Addressing Arguments Raised on Rehearing
ER18-619-002 02/18/21
ISO New England Inc.
Order Rejecting Rehearing Request
2020
Docket No.
Date Issued
Company
Title
ER18-619-001 11/19/20
ISO New England Inc.
Order Addressing Arguments Raised on Rehearing
ER20-739-002 09/17/2020
ISO New England Inc.
Order Addressing Arguments Raised on Rehearing
ER19-1428-003 06/18/20
ISO New England Inc.
Order Accepting Tariff Revisions
EL19-90-000 06/18/20
ISO New England Inc.
Order on Section 206 Investigation
ER19-470-003 04/16/20
ISO New England Inc.
Order on Rehearing
ER19-1952-000 03/19/20
ISO New England Inc.
Order Accepting Tariff Revisions
ER19-1951-000 03/19/20
ISO New England Inc. and Participating Transmission Owners Administrative Committee
Order on Compliance
ER20-308-000 02/20/20
ISO New England Inc.
Order Accepting Informational Filing
2019
Docket No.
Date Issued
Company
Title
ER19-470-000 11/21/19
ISO New England Inc.
Order on Compliance Filing
EL19-90-000 10/17/19
ISO New England Inc.
Order Instituting Section 206 Proceeding
2018
Docket No.
Date Issued
Company
Title
ER19-169-000 12/20/18
ISO New England, Inc.
Order Accepting Tariff Revisions
ER14-1409-000 09/20/18
ISO New England Inc.
Order Dismissing Amended Protest
EL16-120-002 09/20/18
New England Power Generators Association, Inc.
Order Denying Motion for Clarification and Accepting Compliance Filing
ER18-619-000 03/09/18
ISO New England Inc.
Order on Tariff Filing
2017
Docket No.
Date Issued
Company
Title
ER17-2110-000 10/19/17
ISO New England Inc.
Order Accepting Filing and Granting Waiver
EL16-120-000 01/19/17
New England Power Generators Association, Inc.
Order Granting Complaint In Part and Setting Complaint for Hearing and Settlement Judge Procedures In Part
ER16-1904-001 01/19/17
ISO New England Inc.
Order Denying Rehearing
2016
Docket No.
Date Issued
Company
Title
EL16-38-001 10/20/16
Dominion Energy Marketing, Inc.
Order Denying Rehearing
ER16-1041-000 06/16/16
ISO New England Inc.
Order Accepting Forward Capacity Auction Results Filing
EL16-48-000 06/16/16
NextEra Energy Power Marketing, LLC and Northeast Energy Associates, a Limited Partnership
Order On Complaint
ER08-633-003 05/19/16
ISO New England Inc.
Order Directing Resettlements
2015
Docket No.
Date Issued
Company
Title
EL14-23-000 11/19/15
ISO New England Inc.
Order On Compliance Filing
EL15-25-001 11/19/15
New England Power Generators Association, Inc.
Order Denying Rehearing
ER14-2419-003 and EL14-52-002 11/19/15
ISO New England Inc.
Order Denying Rehearing
ER14-1050-002 and EL14-52-001 11/19/15
ISO New England Inc.
Order Denying Rehearing
EL15-57-000 07/16/15
GenOn Energy Management, LLC
Order Denying Complaint
ER15-1137-000 06/18/15
ISO New England Inc.
Order Accepting Forward Capacity Auction Results Filing
