Solar for Eversource (Massachusetts) Customers: Net Metering and Export Credits
How your utility credits the solar power you send back to the grid has a big effect on what solar is worth to you. Here's what official sources say for Eversource (Massachusetts) customers. Rules change, so confirm current terms with the utility before you sign.
About Eversource (Massachusetts)
The U.S. Energy Information Administration's Form EIA-861 data for 2024 lists 1,303,076 residential customers for NSTAR Electric Company (Massachusetts), ranking #26 among U.S. utilities in our tally of bundled plus delivery-only residential customers. Source: https://www.eia.gov/electricity/data/eia861/ (accessed 2026-10-20)
How Eversource (Massachusetts) credits home solar
- Eversource says its Massachusetts Market Net Metering Credit equals 60% of the distribution, transmission, transition, and Basic Service rates per kWh. A Class I net metering facility of 10 kW or less on a single-phase circuit (or 25 kW three-phase) is exempt from the Market Net Metering Credit. Source: https://www.eversource.com/residential/about/doing-business-with-us/interconnections/massachusetts/net-metering/faq (accessed 2026-10-20)
- Eversource says systems of 25 kW AC or less are exempt from the Cap Allocation requirement. Source: https://www.eversource.com/residential/about/doing-business-with-us/interconnections/massachusetts/net-metering/faq (accessed 2026-10-20)
A note on the federal tax credit
The federal residential clean energy credit (25D) doesn't apply to expenditures made after December 31, 2025. The IRS treats an expenditure as made when installation is completed. Source: https://www.irs.gov/newsroom/faqs-for-modification-of-sections-25c-25d-25e-30c-30d-45l-45w-and-179d-under-public-law-119-21-139-stat-72-july-4-2025-commonly-known-as-the-one-big-beautiful-bill-obbb (accessed 2026-10-20). This page isn't tax advice.
What this means for your quote
Savings depend on how much of your solar you use on site versus export, your rate plan, and your system size. We can't give a typical savings figure; it varies, and your quote should show the assumptions behind any estimate.
Questions for your installer
- Will my system get the standard or the market net metering credit?
- Is my system on a single-phase circuit?
- Will you handle the Eversource (Massachusetts) interconnection application?
Sources
- https://www.eversource.com/residential/about/doing-business-with-us/interconnections/massachusetts/net-metering/faq (accessed Oct 20, 2026)
- U.S. Energy Information Administration, Form EIA-861 (2024 data) — https://www.eia.gov/electricity/data/eia861/ (accessed Oct 20, 2026)
- IRS, "FAQs for modification of sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D under Public Law 119-21 (OBBB)" — https://www.irs.gov/newsroom/faqs-for-modification-of-sections-25c-25d-25e-30c-30d-45l-45w-and-179d-under-public-law-119-21-139-stat-72-july-4-2025-commonly-known-as-the-one-big-beautiful-bill-obbb (accessed Oct 20, 2026)
SolarMatchup is a free service: you submit one request and we match you with one installer. Their proposal is an estimate, not a guarantee — use this guide to read it carefully and ask questions before you sign. Savings, if any, depend on your usage, utility rates, and local rules.
Last reviewed 2026-10-20.
More for Massachusetts homeowners: state guide with utility rules, prices and city pages.
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