Net Metering in Massachusetts: How It Works in 2026
Net metering in Massachusetts is a state-regulated billing program that allows solar panel owners to earn credits for excess electricity sent to the grid. In 2026, homeowners and businesses with eligible solar panel systems can receive near retail-rate net metering credits that are applied directly to future electric bills, reducing overall energy costs.
Massachusetts net metering is administered by utilities like Eversource, National Grid, and Unitil under rules set by the Massachusetts Department of Public Utilities. Most residential solar systems qualify, and net metering credits do not expire, making it one of the most valuable solar incentives in the state.
This guide explains exactly how net metering works in Massachusetts, who qualifies, how credits are calculated, current caps and limits, and how the program compares to other incentives like the SMART program.
Key Takeaways
Net metering allows customers to earn bill credits for excess solar electricity sent to the grid
Massachusetts utilities like Eversource, National Grid, and Unitil all participate
Credits are based on the net metering tariff and vary slightly by utility
Net metering credits never expire and can offset future bills
The SMART program works alongside net metering to increase solar savings
There are caps and eligibility rules depending on system size and municipality
What is solar net metering in Massachusetts?
Net metering in Massachusetts is a billing system that credits solar panel system owners for excess electricity they send to the electric grid.
Net metering allows customers to offset their energy use by applying those credits to future bills. When your rooftop system produces more power than your on-site load needs, the extra energy flows back to the grid and earns a net metering credit.
This program is governed by the Massachusetts Department of Public Utilities, often referred to as the DPU. The DPU sets the rules and regulations for how net metering works, including the net metering tariff and eligibility requirements.
Who qualifies for net metering?
Most residential solar customers in Massachusetts qualify for net metering, but there are specific requirements.
To be eligible to net meter, you must install a solar panel system that is properly interconnected with your utility and sized appropriately for your energy usage. This process is called interconnection and must be approved before you can participate in net metering.
There are different categories of net metering host customers. Residential solar typically falls under smaller system classifications, while larger commercial or public entity systems may fall under different cap allocation categories.
Utilities like Eversource, National Grid, and Unitil all administer the program, but the eligibility rules are consistent statewide under DPU oversight.
How are net metering credits calculated?
Net metering credits are based on the value of electricity you send back to the grid.
In Massachusetts, most residential solar customers receive credits close to the full retail electricity rate. That includes supply charges and some delivery charges, depending on the net metering tariff.
When your system produces solar electricity, your meter tracks both the energy you use and the energy you export. The difference determines your billing for that period.
If you produce more than you use, the extra becomes net metering credits to offset future bills. These credits accumulate and roll forward, allowing customers to balance seasonal energy production and consumption.
What are the net metering caps and limits?
Massachusetts uses a cap system to limit how much solar can participate in net metering.
There are two main caps. A public cap for government and public entity systems, and a private cap for residential and commercial customers. Each utility tracks available capacity within each municipality.
For most residential solar systems, cap availability is not a major issue. However, larger projects may need to check cap allocation before installation.
The Massachusetts Department of Public Utilities provides information on net metering caps and maintains oversight of how utilities manage them.
If a cap is reached in your area, you may still be able to install solar, but the financial structure may change.
How do utilities handle net metering?
Utilities play a central role in solar net metering.
Companies like Eversource and National Grid handle billing, track energy usage, and apply net metering credits to your account.
Once your system is interconnected, your utility installs or updates your meter to measure both incoming and outgoing electricity. This ensures accurate billing and credit tracking.
Utilities also manage the application process for interconnection and net metering enrollment. Your solar installer typically coordinates this process, but final approval comes from the utility.
How does net metering affect your electric bill?
Net metering can significantly reduce your electric bill.
When your solar panel system produces electricity, you use that power first. This reduces the amount of electricity you need to buy from your utility. If you produce excess, you earn credits.
These net metering credits are applied to future bills, helping offset times when your system produces less, such as during winter months or cloudy periods.
In many cases, homeowners with properly sized systems can reduce their net electricity costs dramatically. Some even reach near-zero electric bills over the course of a year.
How does net metering compare to other Massachusetts solar incentives?
Net metering is one piece of the overall solar picture in Massachusetts.
The other major program is the SMART program. While net metering offsets your electric bill, SMART pays you based on how much electricity your system produces. It is a performance-based incentive, so the more your system generates, the more you earn over time.
Massachusetts also offers a state solar tax credit, which helps reduce upfront costs. Homeowners can claim a credit equal to 15% of their system cost, up to a maximum of $1,000. It is not massive, but it does help lower the initial investment when you install a new solar panel system.
These programs work together in different ways. Net metering reduces what you owe each month. SMART provides ongoing payments tied to production. The state tax credit helps on the front end.
When you stack everything together, the value is still strong. Lower monthly bills, performance payments, and a small upfront tax break all contribute to long-term savings on solar energy.
FAQs About Net Metering in Massachusetts
Is net metering still available in Massachusetts in 2026?
Yes, net metering is still available in Massachusetts in 2026. The program continues to be administered by utilities and regulated by the DPU. It remains a key part of the state’s clean energy strategy.
Do all solar systems qualify for net metering?
No, not all solar systems automatically qualify. Systems must meet interconnection requirements, sizing guidelines, and utility approval standards. Most residential rooftop systems are eligible, but larger or unusual systems may require additional review.
Can net metering credits expire or be transferred?
Net metering credits never expire in Massachusetts. They continue to roll forward on your account indefinitely. In some cases, credits can also be allocated to other accounts, depending on utility rules and system classification.
How long does approval for net metering take?
Approval timelines vary but typically take several weeks to a few months. The process includes interconnection review, utility approval, and final inspection. Your installer usually manages most of this process.
What happens if I produce more electricity than I use?
You receive net metering credits for the excess electricity. These credits are applied to future bills and help offset times when your system produces less energy. Over time, this balances your overall energy usage.
Do I need battery storage for net metering?
No, battery storage is not required for net metering. The grid effectively acts as your storage system by allowing you to send excess electricity out and receive credits. However, batteries can provide backup power and additional energy independence.
Net metering rules, utility tariffs, solar incentives, and eligibility requirements can change over time and may vary based on your utility, system size, location, and project type. This article is for general informational purposes only and should not be considered legal, financial, tax, or utility-specific advice. Before making decisions about a solar installation, confirm current program details with your solar installer, utility provider, the Massachusetts Department of Public Utilities, and a qualified tax or financial professional.