DEPARTMENT OF PUBLIC UTILITIES

NOTICE OF FILING AND REQUEST FOR COMMENTS

D.P.U. 26-59 May 15, 2026

Petition of NSTAR Electric Company d/b/a Eversource Energy for Approval of its 2026 Energy

Efficiency Reconciling Factors for effect July 1, 2026.

____________________________________________________________________________

On May 1, 2026, NSTAR Electric Company d/b/a Eversource Energy (“Company”) filed

with the Department of Public Utilities (“Department”) a petition seeking approval of its 2026

Energy Efficiency Reconciling Factors (“EERFs”) for effect July 1, 2026. The Department

docketed the Company’s petition as D.P.U. 26-59.

An EERF collects additional funds for approved energy efficiency programs when the

cost of implementing those programs exceeds other funding sources. See G.L. c. 25, § 19(a).

The Company proposes the following EERFs for effect July 1, 2026: (1) 2.042 cents per

kilowatt-hour (“kWh”) for residential customers, including low-income customers; and

(2) 1.139 cents per kWh for commercial and industrial (“C&I”) customers. The proposed EERFs

are designed to: (1) collect costs associated with the Company’s 2026 energy efficiency program

implementation in excess of other funding sources; and (2) reconcile expenses and revenues

from the previous year’s program implementation.

In addition, on April 3, 2026, the Company filed a request to change the effective date of

its EERFs from July 1 to September 1 each year, beginning with the instant EERFs. The

Department indicated that it would consider the Company’s request for a revised effective date

as part of its investigation of the instant EERFs in this proceeding. Hearing Officer

Memorandum at 1 (April 17, 2026). Pending the Department’s determination on the Company’s

request to modify the effective date, the instant EERF filing proceeds on the basis that the

proposed rates will take effect on July 1, 2026.

If the Department approves the 2026 EERFs as proposed, the Company states that

customers will experience the following bill impacts:

• a typical residential customer (R-1) in Eastern Massachusetts using 530 kWh of

electricity per month will experience a monthly bill decrease of $1.13

(or approximately 0.6 percent);

• a typical residential customer (R-1) in Western Massachusetts using 545 kWh of

electricity per month will experience a monthly bill decrease of $1.17

(or approximately 0.6 percent);

D.P.U. 26-59 Page 2

• a typical low-income residential customer (R-2) in Eastern Massachusetts using

475 kWh of electricity per month will experience a monthly bill decrease of $0.59 (or

approximately 0.6 percent);

• a typical low-income residential customer (R-2) in Western Massachusetts using

585 kWh of electricity per month will experience a monthly bill decrease of $0.72 (or

approximately 0.6 percent);

• a typical residential customer on a heat pump rate (R-1HP) in Eastern Massachusetts

will experience a monthly bill decrease of $3.67 (or approximately 0.8 percent) in

winter and a decrease of $1.29 (or approximately 0.6 percent) in summer;

• a typical residential customer on a heat pump rate (R-1HP) in Western Massachusetts

will experience a monthly bill decrease of $3.77 (or approximately 0.9 percent) in

winter and a decrease of $1.33 (or approximately 0.6 percent) in summer;

• a typical low-income residential customer on a heat pump rate (R-2HP) in Eastern

Massachusetts will experience a monthly bill decrease of $2.12 (or approximately

0.8 percent) in winter and a decrease of $0.75 (or approximately 0.6 percent) in

summer;

• a typical low-income residential customer on a heat pump rate (R-2HP) in Western

Massachusetts will experience a monthly bill decrease of $2.19 (or approximately

0.9 percent) in winter and a decrease of $0.77 (or approximately 0.6 percent) in

summer; and

• C&I customers will experience a range of bill impacts, from no change to an increase

of 1.5 percent, depending on rate class and usage. For specific bill impacts, these

customers should contact the Company as shown below.

Any person interested in commenting on this matter, including the Company’s request to

change the effective date of the EERF, may submit written comments no later than the close of

business (5:00 p.m.) on June 11, 2026. The Department strongly encourages members of the

public to submit comments by email in the manner described below. If, however, a member of

the public is unable to send written comments by email, a paper copy may be sent to Peter A.

Ray, Secretary, Department of Public Utilities, One South Station, Boston, Massachusetts,

02110.

All comments should be submitted to the Department in .pdf format by e-mail

attachment to dpu.efiling@mass.gov and krista.hawley@mass.gov. The text of the e-mail must

specify: (1) the docket number of the proceeding (D.P.U. 26-59); (2) the name of the person or

company submitting the filing; and (3) a brief descriptive title of the document. In addition, a

copy of all comments should be sent to the Company’s attorneys, John K. Habib, Esq. at

jhabib@keeganwerlin.com, and Ashley S. Marton, Esq. at amarton@keeganwerlin.com.

All documents submitted in electronic format will be posted on the Department’s website

through our online File Room as soon as practicable (enter “26-59”) at:

D.P.U. 26-59 Page 3

https://eeaonline.eea.state.ma.us/DPU/Fileroom/dockets/bynumber. Please note that in the

interest of transparency any comments will be posted to our website as received without

redacting personal information, such as addresses, telephone numbers, or email addresses.

Therefore, consider the extent of information you wish to share when submitting comments.

To request materials in accessible formats for people with disabilities (Braille, large print,

electronic files, audio format), contact the Department’s ADA coordinator at

eeadiversity@mass.gov or (617) 626-1282.

For further information regarding the Company’s filing, please contact the Company’s

attorneys, John K. Habib, Esq. at jhabib@keeganwerlin.com, and Ashley S. Marton, Esq. at

amarton@keeganwerlin.com, or (617) 951-1400. For further information regarding this Notice,

please contact Krista Hawley, Hearing Officer, Department of Public Utilities, at

krista.hawley@mass.gov.

D.P.U. 26-59 Page 4

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