Westport CEA is an electricity supply program organized by the town of Westport to provide residents and businesses with new, town-vetted options for electricity supply. The delivery of electricity, and billing for use, is still completed by your utility, so customers continue to receive one bill from the utility.
More Ways to Save! Discounts are available if you are a low-income customer. You can also reduce your bill through heat pump discounts. Learn more below.
Discounts are available if you are a low-income customer. You can also reduce your bill through heat pump discounts. Learn more below.
The Community Electricity Aggregation program has been renewed, with new prices for the period November 2025 until November 2028. Most current participants do not need to take any action to remain in the CEA program and receive the new pricing. Please be on the lookout for a notification letter arriving late September. You can see a copy of the letter with the details in the resources section down below.
Electricity Options
In addition to the standard electricity supply product, the Program also offers an option with 100% total energy from renewable energy certificates. You can sign up for either option, return to the default or leave the program at any time. You can also check the sample bill in the Resources section for an illustration of a simple way to tell if you a part of the CEA program.
| Program Options Until November 2025 | |
 Standard Product (community default) |
 Plus |
|
15.784 ¢/kWh All Rate Classes |
17.372 ¢/kWh All Rate Classes |
|
No additional renewable energy (63% in 2025) |
Adds renewable energy to total 100% (100% in 2025) |
| 23 Months: December 2023 until November 2025 Meter Reads | |
| Program Options Starting November 2025 | |
|
Standard Product (community default) |
Plus |
|
14.346 ¢/kWh All Rate Classes |
15.475 ¢/kWh All Rate Classes |
|
No additional renewable energy (63% in 2025) |
Adds renewable energy to total 100% (100% in 2025) |
| 36 Months: Novmeber 2025 until November 2028 Meter Reads | |
Please note: Prices for all products in the program include a 0.1 ¢/kWh administration fee. Program prices apply only to the electricity supply portion of your electric bill. Delivery charges on your electric bill are not affected by the program.
If you are a new medium, large or very large business customer, or if you have previously opted out of the Program, the supplier has the option to offer a market price. Market prices will be offered by the electricity supplier in writing or phone, and you will not be enrolled in that price unless you affirmatively accept.
RECs are the accepted legal instrument used to track renewable energy generation and to substantiate claims of renewable energy use.
See Eversource Basic Service supply prices for residential customers here and for business customers here.
See National Grid Basic Service supply prices for residential customers here and for business customers here.
*Disclaimer: A goal of the CEA program is to produce savings for customers, but savings cannot be guaranteed compared to the utility’s Basic Service rate which changes every three months for industrial customers and every six months for residential and small commercial customers. The aggregation program seeks to provide price stability and average savings over the full term of the program, but because future Basic Service rates are not known, there is no guarantee of savings
Enroll or Change Option in Westport CEA
If you’re already participating in the Community Electricity Aggregation program, you can also use this form to sign up for additional renewable electricity with 50% Local Green or 100% Local Green.
Opting Up to 100% Local Green is a powerful way to combat climate change!
If you are not participating in the Community Electricity Aggregation program, you can use the online form below to enroll in one of the Community Electricity Aggregation options. Once enrolled and service has begun, your choice will be reflected on your following month’s electricity bill for the previous month’s service. Please note that based on your meter read date, it may take up to two billing cycles to be enrolled.
If you are currently a customer of a competitive supplier, you may be subject to penalties or early termination fees from your supplier if you switch from the competitive supplier to the program during the term of your contract. There is no charge for leaving Basic Service, however, industrial customers leaving fixed-price Basic Service may receive a billing adjustment that may be a credit or a charge.
Please be sure to use the name and address associated with your account.
Renewable Energy in the Westport Community Electricity Aggregation Program
| Year | Required MA Class I | Required Other Renewables | Voluntary Renewables added by Community Electricity Program | Total Renewables | |
|
Standard (automatic) |
2024 | 24% | 38% | – | 62% |
| 2025 | 27% | 36% | – | 63% | |
| Plus | 2024 | 24% | 38% | 38% | 100% |
| 2025 | 27% | 36% | 37% | 100% | |
|
Utility Basic Service if you opt out |
2024 | 24% | 38% | – | 62% |
| 2025 | 27% | 36% | – | 63% |
With the Plus product the CEA Program presents a unique opportunity for us to influence the development of renewable energy resources by going above and beyond the requirements in Massachusetts, i.e., voluntarily purchasing additional renewable energy. See the Massachusetts’ renewable energy requirements.
In the CEA, all purchases of renewable electricity will be certified by purchasing and retiring Renewable Energy Certificates (RECs), the accepted legal instrument used to track renewable energy generation and to substantiate claims of renewable energy use. Read more about why we need RECs.
All of the additional renewable energy in the Plus Product will come from sources designated as MA Class I. These sources must be physically part of our New England electricity grid. This stands in contrast to some electricity supplies that obtain their renewable energy from national sources (e.g., Texas) that are not physically connected to our New England electricity grid. While those sources provide very cheap electricity, you get what you pay for; including them in the electricity mix does not move our region away from fossil fuels.
MA Class I is the Massachusetts term for new, local renewable energy. The renewable energy can come from the sources shown in the figure below and must:
- Have started operation after 1997
- Be located within New England, New York or Eastern Canada
2022 Sources of MA Class I for RPS Compliance
What Are RECs and Why We Need Them
When electricity generated by renewable sources – such as solar and wind – is put onto our regional electricity grid, it becomes mixed in with and indistinguishable from the other electricity on the grid. It is not possible to physically separate out renewable electricity from the grid mix for your individual consumption.
As a result, a tracking system, called Renewable Energy Certificates (RECs), has been created to enable the purchase and use of renewable electricity. For every one megawatt-hour of renewable electricity generated, one REC is created. In order to use renewable electricity, one must purchase a quantity of RECs equal to the amount of electricity purchased from the grid. Once used, a REC is retired so that no one else can purchase that same REC or claim to use it.
How big is our impact?
All 25 of the municipalities participating in the MASS CEA buying group, of which your community is one, offer a 100% renewable energy as an optional product. If just four percent of residential households opt up to the 100% renewable Plus product, it would result in extra demand equivalent to more than 10 typical onshore wind turbines (1.5 MW each).Â
Those 10 wind turbines could power over 6,000 homes with clean energy and could displace over 45,000 MWh with clean electricity, avoiding:
- 29 million pounds of carbon dioxide, equivalent to taking over 2,800 vehicles off the road for one year
- 3,600 pounds of sulfur dioxide
- 6,750 pounds of nitrous oxide
Calculations based on ISO-New England emissions factors for 2017.
Support & Information for Westport CEA
If you have questions about your participation, contact the electricity supplier, Constellation at (833) 461-0813, or by email at vst@constellation.com. For general program questions you can reach Good Energy, the consultant that manages the Program, by submitting an inquiry or comment by completing the Contact Us form.
Use our bill calculator to compare the monthly costs of the CEA program and utility Basic Service.
Westport CEA is overseen by the Town Administrator’s Office.
More Ways to Save
- Low-Income Discount: National Grid in Massachusetts has transitioned to a tiered low-income discount rate, replacing the previous flat 32% discount. Discounts now range from 32% to 71% based on income level and apply to the entire bill, including the cost of Westport CEA supply. National Grid customers can use this page to enroll. Eversource in Massachusetts provides a 42% discount to low-income customers that apply to the entire bill, including the cost of Westport CEA supply. Eversource customers can use this page to enroll.
- Heat Pump Discount Rate: Starting November 1, 2025, most electricity customers with heat pumps will receive a discount through National Grid and Eversource’s ‘heat pump’ delivery rate. This discount applies only to the delivery portion of electric bills, so customers in this community’s aggregation program remain eligible and can enjoy added savings.
- Key details:
- Automatic enrollment: Customers with Mass Save®-supported heat pumps installed on or after Jan 1, 2019 will be automatically enrolled starting Nov 1, 2025 — no action needed.
- Winter discount: Reduced delivery rates apply Nov 1 – Apr 30 each year.
- Estimated savings: About $540 per winter (Mass. DPU).
- No impact on supply: Only affects delivery charges; aggregation supply rates stay the same.
- Non-heat-pump customers: Remain on standard delivery rates.
- Enrollment notices: Sent prior to the November 1, 2025 enrollment date.
- Manual enrollment: All other customers need to reach out to National Grid or Eversource to enroll.
- Key details:
Check National Grid’s heat pump rate page or Eversource’s heat pump rate page to find more information about signing up. For more information on heat pumps, check out this helpful FAQ from Mass Save.
How to Leave the Program
If you do not wish to participate in the CEA program, you may submit the opt-out form below or contact the current program supplier, Constellation at (833) 461-0813.
Compare Rates for the Westport CEA Program with Your Utility
(choose the calculator that matches your utility provider)
| ENTER MONTHLY KWH: | ||
|
COMMUNITY ELECTRICITY AGGREGATION RATES (December 2023 until November 2025 Meter Reads) |
||
| Product | Rate | Monthly Supply Cost |
| STANDARD Adds 10% Renewable |
$0.15784 | $ |
| PLUS Adds Renewable Energy to Total 100% |
$0.17372 | $ |
|
NATIONAL GRID RATES (Aug. 1, 2025 – Jan. 31, 2026) |
||
| Rate Class | Rate | Monthly Supply Cost |
| RESIDENTIAL | $0.15484 | $ |
| COMMERCIAL | $0.14411 | $ |
|
INDUSTRIAL(NEMA) (Aug. 1 – Oct. 31, 2025) |
$0.10792 | $ |
|
INDUSTRIAL (SEMA) (Aug. 1 – Oct. 31, 2025) |
$0.11065 | $ |
|
INDUSTRIAL (WCMA) (Aug 1 – Oct. 31, 2025) |
$0.10725 | $ |
Disclaimer: A goal of the CEA program is to produce savings for customers, but savings cannot be guaranteed compared to the utility’s Basic Service rate which changes every three months for industrial customers and every six months for residential and small commercial customers.
More Ways to Save
- Low-Income Discount: National Grid in Massachusetts has transitioned to a tiered low-income discount rate, replacing the previous flat 32% discount. Discounts now range from 32% to 71% based on income level and apply to the entire bill, including the cost of the CEA supply. Go to this page to enroll.
- Heat Pump Discount Rate: Starting November 1, 2025, most electricity customers with heat pumps will receive a discount through National Grid’s ‘heat pump’ delivery rate. This discount applies only to the delivery portion of electric bills, so customers in this community’s aggregation program remain eligible and can enjoy added savings.
- Automatic enrollment: Customers with Mass Save®-supported heat pumps installed on or after Jan 1, 2019 will be automatically enrolled starting Nov 1, 2025 — no action needed.
- Winter discount: Reduced delivery rates apply Nov 1 – Apr 30 each year.
- Estimated savings: About $540 per winter (Mass. DPU).
- No impact on supply: Only affects delivery charges; aggregation supply rates stay the same.
- Non-heat-pump customers: Remain on standard delivery rates.
- Enrollment notices: Sent by late Oct 2025.
- Manual enrollment: All other customers need to reach out to National Grid to enroll.
Check National Grid’s heat pump rate page to find more information about signing up. For more information on heat pumps, check out this helpful FAQ from Mass Save.
| ENTER MONTHLY KWH: | ||
|
COMMUNITY ELECTRICITY AGGREGATION RATES (December 2023 until November 2025 Meter Reads) |
||
| Product | Rate | Monthly Supply Cost |
| STANDARD Adds 10% Renewable |
$0.15784 | $ |
| PLUS Adds Renewable Energy to Total 100% |
$0.17372 | $ |
|
EVERSOURCE RATES (Feb. 1-Jul. 31, 2025) |
||
| Rate Class | Rate | Monthly Supply Cost |
| RESIDENTIAL | $0.14884 | $ |
| SMALL BUSINESS & LIGHTING | $0.15150 | $ |
|
LARGE BUSINESS (NEMA) (November 1, 2025 – January 31, 2026) |
$0.18127 | $ |
|
LARGE BUSINESS (SEMA) (November 1, 2025 – January 31, 2026) |
$0.18037 | $ |
Disclaimer: A goal of the CEA program is to produce savings for customers, but savings cannot be guaranteed compared to the utility’s Basic Service rate which changes every three months for industrial customers and every six months for residential and small commercial customers. The aggregation program seeks to provide price stability and average savings over the full term of the program, but because future Basic Service rates are not known, there is no guarantee of savings.
Ways to Save
- Low-Income Discount: Eversource in Massachusetts provides a 42% discount to low-income customers that apply to the entire bill, including the cost of the CEA supply. Go to this page to enroll.Â
- Heat Pump Discount Rate: Starting November 1, 2025, most electricity customers with heat pumps will receive a discount through Eversource’s ‘heat pump’ delivery rate. This discount applies only to the delivery portion of electric bills, so customers in this community’s aggregation program remain eligible and can enjoy added savings.Â
- Automatic enrollment: Customers with Mass Save®-supported heat pumps installed on or after Jan 1, 2019 will be automatically enrolled starting Nov 1, 2025 — no action needed.
- Winter discount: Reduced delivery rates apply Nov 1 – Apr 30 each year.
- Estimated savings: About $540 per winter (Mass. DPU).
- No impact on supply: Only affects delivery charges; aggregation supply rates stay the same.
- Non-heat-pump customers: Remain on standard delivery rates.
- Enrollment notices: Will be sent prior to the November 1, 2025 enrollment date.
- Manual enrollment: All other customers need to reach out to Eversource to enroll.Â
Check Eversource’s heat pump rate page to find more information about signing up. For more information on heat pumps, check out this helpful FAQ from Mass Save.
Program Resources
View Westport’s Opt-Out Letter, Eversource for contract ending November 2025.
View Westport’s Opt-Out Letter, National Grid for contract ending November 2025.
View Westport’s Revised Aggregation Plan, available for public review December 9, 2024 to January 13, 2025, filed with Department of Public Utilities January 27, 2025.
Read through Westport’s approved Aggregation Plan, approved in 2015.
View historical Plan information in the Department of Public Utilities’ file room for docket 04-69 here.
Visit the Department of Public Utilities (D.P.U.) website and the Department of Energy Resources website on municipal aggregation
See Eversource Basic Service supply prices for residential customers here and for business customers here.
See National Grid Basic Service supply prices for residential customers here and for business customers here.
Return to the town of Westport website
2024 Program Documents
View Westport’s 2024 DPU Annual Report
View Westport’s Opt-Out Notification Letter for 2024: Eversource, National Grid
2023 Program Documents
View Westport’s 2023 DPU Annual Report
View Westport’s Opt-Out Notification Letter for 2023
View Westport’s Program Renewal Letter mailed October 2023