New England Power Company Market-Based Rate Tariffs Accepted
Summary
FERC issued a letter order accepting New England Power Company and affiliated entities' revised market-based rate tariff filings under dockets ER26-871 et al. The accepted filing, originally submitted December 23, 2025 and amended March 2, 2026, adds authorization for sales of ancillary services at market-based rates in the applicable markets.
What changed
FERC's Office of Energy Market Regulation issued a delegated order accepting revised market-based rate tariff filings submitted by New England Power Company, Massachusetts Electric Company, Niagara Mohawk Power Corporation, National Grid Generation LLC, and National Grid-Port Jefferson Energy Center LLC. The accepted filing adds authorization for these affiliated entities to sell ancillary services at market-based rates in the relevant wholesale electricity markets.
Affected utilities and energy companies operating under these tariffs should update their market-based rate documentation and ensure compliance with the approved tariff terms. The acceptance authorizes these National Grid-affiliated entities to continue participating in wholesale electricity markets with ancillary services sales at market-based rates.
What to do next
- Monitor compliance with approved tariff terms
- Ensure accurate billing under new ancillary services rates
- Maintain market-based rate authority requirements
Archived snapshot
Apr 9, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Document Info for Accession Number: 20260409-3055
Details Document: 04/09/2026
Filed: 04/09/2026
Posted: 04/09/2026 01:31:05 PM
First Received Date: 04/09/2026 01:20:55 PM
Security Level: Public
Official: Yes
E-filing: No
Non-decisional: No
Category: Issuance
Library: Electric
Aperture: 0
File Type:
Description* :** Letter order accepting New England Power Company's et al. 12/23/2025, as amended on 03/02/2026, filing of revised market-based rate tariffs to add sales of ancillary services at market-based rates in the markets etc. under ER26-871 et al.
File List
| Docket | Sub-Docket | Type |
| --- | --- | --- |
| ER26-871 | 001 | On Document |
| ER26-872 | 001 | On Document |
| ER26-873 | 001 | On Document |
| ER26-875 | 001 | On Document |
| ER26-877 | 001 | On Document |
| Document Class | Document Type |
| --- | --- |
| Order/Opinion | Delegated Order |
| Correspondent | Last Name | First Name | MI | Role/Org |
| --- | --- | --- | --- | --- |
| AUTHOR | Poré | A | S | OFFICE OF ENERGY MARKET REGULATION |
| RECIPIENT | * | * | | NEW ENGLAND POWER COMPANY |
| RECIPIENT | * | * | | MASSACHUSETTS ELECTRIC COMPANY |
| RECIPIENT | * | * | | NIAGARA MOHAWK POWER CORPORATION |
| RECIPIENT | * | * | | NATIONAL GRID GENERATION LLC |
| RECIPIENT | * | * | | NATIONAL GRID-PORT JEFFERSON ENERGY CENTER LLC |
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