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Electric Information For New Hampshire Suppliers and Aggregators

Eversource welcomes the competitive electric market as well as the opportunity to meet and support energy suppliers and aggregators.

Residential Customer Service
Monday through Friday, 7 a.m. to 7 p.m.
800-346-9994 (Hearing Impaired TTY/TDD) 

Business Customer Service
Monday through Friday, 8 a.m. to 5 p.m.

Energy Suppliers and Brokers
New Hampshire Public Utilities Commission


Important Documents and Forms


New Hampshire Public Utilities Links

Numeric Profile Segments

The methodology used to estimate supplier loads is described in the Terms and Conditions for Energy Service Providers section of the currently effective Electric Delivery Service Tariff

In compliance with the terms and conditions, Eversource is providing the hourly load shapes for various customer classes which are used to estimate these supplier loads.

To download the average hourly data for a specific customer class, select the MS Excel file format and save the file to your hard drive. Once the file is saved, it can be imported into most spreadsheet programs.

Loss Factors

The loss factors below are utilized to calculate losses, which will then be added to actual or estimated load to arrive at total supplier assigned load. The loss factors below do not include transmission losses.

Rate TypeLoss Factors
Rate R - Residential7.75%
Rate G - Small Commercial, < 100KW7.75%
Rate GV - Customers between 100 KW - 1000 KW6.31%
Rate LG - Customers > 1000 KW4.42%
Rate OL & EOL - Outdoor Lighting7.72%

Capacity Unaccounted for Energy (UFE) Information

This daily Unaccounted for Energy (UFE) value reflects the difference between the day's sum of the individual Eversource customer coincident peak capacity values (inclusive of non-Pool Transmission Facility losses) and the total Eversource system peak load for the applicable capability year.

Effective May 15, 2024, the value is 1.09196.


Electronic Interchange (EDI) schedule

Daily Activity/EventApproximate Completion Time
Receive Supplier EDI Input00:00 - 15:00
Daily Billing Cycle Process16:00 - 08:00 (Upload readings, post cash billing)
Bills printed/inserted/mailedBy 18:00
Transmit EDI Output to Suppliers12:00 - 15:00

Holiday schedule for EDI

Eversource will not process or send Electronic Data Interchange (EDI) transactions on the holidays as listed in the Electric Delivery Service Tariff. EDI transactions will be processed and sent the following business day.

Meter reading (PDF)

Supplier training schedule

Supplier training sessions are offered to new suppliers just prior to moving to EDI production in the Eversource territory.