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      Electric Information For Suppliers & Aggregators

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

      Following is information for energy suppliers and aggregators in order to facilitate participation in the competitive energy market.

      Load Shape Profiles

      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.

      Rate Type Adobe PDF Microsoft Excel
      Residential Service (Rate R) PDF Excel
      General Service (Rate G) PDF Excel
      Primary General Service (Rate GV) PDF Excel
      Large General Service (Rate LG) PDF Excel
      Outdoor Lighting Service (Rate OL & EOL) PDF Excel

      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 Type Loss Factors
      Rate R - Residential 7.75%
      Rate G - Small Commercial, < 100KW 7.75%
      Rate GV - Customers between 100 KW - 1000 KW 6.31%
      Rate LG - Customers > 1000 KW 4.42%
      Rate OL & EOL - Outdoor Lighting 7.72%

      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 July 15, 2019, the value is 1.06240.

      Supplier Service Master Agreement

      Click here for our Supplier Services Master Agreement.


      Electronic Interchange (EDI) Schedule

      Daily Activity/Event Approximate Completion Time
      Receive Supplier EDI Input 00:00 - 13:30
      Daily Billing Cycle Process 16:00 - 08:00 (Upload readings, post cash billing)
      Bills printed/inserted/mailed By 16:00
      Transmit EDI Output to Suppliers 8:00 - 12:00 (12:00 noon is the latest time)

      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

      Supplier Training Schedule

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


      State Information

      For More Information

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

      Monday through Friday
      8 a.m. to 5 p.m.

      Energy Suppliers and Brokers