Hamilton CCA, or Community Choice Aggregation, is a municipal electricity bulk-purchasing program operated by the town of Hamilton. With Hamilton CCA, National Grid continues to deliver electricity and manage all electricity billing. The only change is the source and cost of electricity supply, chosen by the town of Hamilton.
Anyone can get a lower supplier rate through Hamilton Basic. Discounts are available if you are a low-income customer. You can also reduce your bill through heat pump discounts. Learn more below.
Program Options
Hamilton CCA’s standard option has five percent more renewable energy content than required by state law. Participants in the program receive Local Green unless they affirmatively choose one of the other electricity options.
| Program Options Starting December 2025 | National Grid | ||
 Hamilton Standard (Community Default) |
 Hamilton Basic |
 Hamilton Plus |
Basic Service |
|
14.190 ¢/kWh All Rate Classes |
13.990 ¢/kWh All Rate Classes |
14.870 ¢/kWh All Rate Classes |
15.372 ¢/kWh Residential |
|
Adds 5% MA Class I RECs to required State standards (74% in 2026) |
Meets renewable energy standards (69% in 2026) |
Adds MA Class I RECs to required State standards to total 100% (100% in 2026) |
No additional renewable energy |
| 48 Months: December 2025 through December 2029 meter reads | February 1 - July 31, 2026 | ||
The additional renewable electricity qualifies for MA Class I designation and comes only from solar, wind, anaerobic digestion and low-impact hydro located within New England. RECs are the accepted legal instrument used to track renewable energy generation and to substantiate claims of renewable energy use. Learn more about the RECs that are included on the Renewable Energy page.
Future savings against National Grid’s fixed Basic Service rate cannot be guaranteed because National Grid’s rates change every six months for residential and commercial customers and every three months for industrial customers.
Goals of Hamilton CCA Program
Competitive, Stable Price
Using strategic purchasing, combined with the bulk purchasing power of thousands of households and businesses in the program, Hamilton CCA provides competitive, stable rates. Please note, savings compared to National Grid Basic Service cannot be guaranteed because Basic Service prices change every six months for residential and commercial customers and every three months for industrial customers.
Support Renewable Energy Sources
CCA’s standard product and optional products include more renewable energy than required by the Commonwealth. This means you can support the growth of renewable energy generation in our region. Learn more about our renewable energy options.
Increased Choice & Easy Participation
The program offers 4 different options for electricity supply so that everyone in Hamilton can find an option that fits their budget and climate goals.
Participants in CCE may leave the program at any time without penalty.
Solar Electricity Consumers will continue to receive their net metering credits while participating in the program.
Budget Plan or Eligible Low-Income delivery rate consumers will continue to receive those benefits from the utility.
More Ways to Save
- Opt-down to Hamilton Basic: Customers seeking greater financial relief can opt down to Hamilton Basic. Click here to enroll.
- 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 Malden Community Electricity 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.
How to Participate in Hamilton CCA
Most residents and businesses in Hamilton already participate in the CCA program. Check your electricity bill to see if you’re one of them: the Supplier should be listed as Dynegy – Hamilton CCA (click for a bill sample). If National Grid is still listed as your supplier, you may complete the enrollment form to sign up for Hamilton CCA. If a different supplier is listed, contact that supplier to check for penalties or termination fees that they may charge before you join the CCA program.
Participation in the Hamilton CCA program is voluntary: you can leave the program at any time without fee or penalty.
The program will periodically send Customer Notification letters to new or newly eligible electricity customers, which includes the program details, information about product prices, and renewable energy certificates. Customers who receive this letter and do not choose to opt out will be automatically enrolled. To enroll sooner, use our online form.
Questions & Support
Have questions or need help? Please visit the support page, which contains the contact information for the current program supplier and a form for comments.