Solar in Medford, MA: National Grid Net Metering, Shading, and Real 2026 Costs

Updated for 2026.

Medford is a leafy inner-Boston suburb of about 59,354 people on 8.1 square miles at the northern edge of the Mystic River, a mix of single-family homes and classic New England two-families that climbs into real hills around Pine Hill and the 2,200-acre Middlesex Fells Reservation (Census Reporter, 2020 Census; Mass.gov DCR, as of 2026). That geography is the whole story for rooftop solar here: the money works because Medford sits on high Massachusetts rates, near-retail net metering, and the state SMART payment, but the hills, the mature tree canopy, and roof orientation decide how much sun a given roof actually gets. This guide covers what solar panels in Medford, MA actually cost, who your utility is and how it pays you, how shading and pitch change the math near the Fells, the Tufts-area two-family and rental question, the City of Medford permit step and its 2019 solar ordinance, the Massachusetts incentives that still apply even though the 30% federal homeowner tax credit (Section 25D) ended after December 31, 2025, and how to screen an installer. Then you can check your address in about a minute.

What a Medford roof earns, and what decides it, in 2026

Short version: a Medford roof earns strong Massachusetts money, but shading and roof shape decide whether you can capture it. High rates, near-retail net metering, and the 20-year SMART payment make the economics work, while Medford’s hills, heavy tree cover, and mix of single-family and two-family roofs decide how much a specific roof produces. Here is what drives both.

• Medford is greener and hillier than the dense cities next door, which shapes every solar decision here. The city sits at about 7,359 people per square mile, well below neighboring Somerville, and climbs into Pine Hill and the 2,200-acre Middlesex Fells Reservation, so mature trees and slope, not lot density, are the main variables (Census Reporter; Mass.gov DCR, as of 2026).
• Most Medford homes are owner-occupied, so more residents actually control their roof. About 54.1% of Medford homes are owner-occupied (Data USA, U.S. Census ACS, as of 2024), the opposite of renter-majority Somerville next door, which means a single homeowner can usually make the call, except around the Tufts campus where two-families and rentals are common.
• Your power is expensive, which is what makes solar pay. Massachusetts residential electricity averages about 30.21 cents per kWh all-in (EIA, as of March 2026), nearly double the national average, so every kilowatt-hour your roof makes offsets an expensive one.
• National Grid runs your net metering, not Eversource. Medford is National Grid (Massachusetts Electric Company) electric territory, unlike Somerville, Cambridge, and Boston next door, which are Eversource (Mass.gov Find My Electric Company, as of 2026). Residential solar is Class I and is credited near full retail value under state net-metering rules (Mass.gov net-metering guide, as of 2026).
• SMART pays you per kWh for 20 years, and more if you qualify. Massachusetts pays the system owner a per-kWh production incentive locked for a 20-year term, at a higher rate for income-eligible households (Mass.gov SMART 3.0, as of 2026).
• The City of Medford permits your install, and it has its own solar rules. Rooftop solar needs a building and electrical permit through the City of Medford Building Department at City Hall, and Medford passed a 2019 solar ordinance that applies to large new construction, not to a standard home retrofit (City of Medford Building Department; City of Medford solar ordinance, as of 2026).
• The 30% federal homeowner credit (Section 25D) ended after December 31, 2025 (IRS, as of January 1, 2026), so a Medford homeowner who buys solar in 2026 cannot claim it.

Is solar worth it in Medford in 2026?

For most Medford homes with a sunny, unshaded roof, yes. The Massachusetts money is strong, and Medford has more homeowners who can act on it than the renter-heavy cities next door. Massachusetts residential electricity averages about 30.21 cents per kWh all-in (EIA, as of March 2026), among the highest rates in the country. National Grid net metering credits your exports near full retail value, and the SMART program adds a separate per-kWh payment on top for 20 years. In Medford the real question is usually the roof itself: a south-facing roof clear of the tree line does well, while a roof shaded by the Fells canopy or a steep hillside lot needs a closer look.

Here is a first-party production estimate for a Medford roof. By MySolarFY’s August 2026 estimate, a 6 kW rooftop system at a Medford ZIP (02155) produces about 7,817 kWh in its first year, based on NREL’s PVWatts model for that location (NREL PVWatts, as of 2026). Valued at the 30.21 cent Massachusetts average rate, that output is worth roughly $2,360 a year, or closer to $2,100 once you account for fixed charges net metering does not offset, before you add the SMART payment and the state tax credit (EIA; Mass.gov, as of 2026). That is an estimate from figures that change and a standard 6 kW system, not a quote for your roof, because real output in a hilly, tree-shaded city like Medford depends heavily on your pitch, shading, and direction, so confirm your own number with NREL’s free PVWatts calculator.

Medford solar economics (estimate, confirm with a quote)	Figure	Source
First-year production, 6 kW system at ZIP 02155	About 7,817 kWh (a MySolarFY estimate, August 2026)	NREL PVWatts, as of 2026
Estimated first-year value of that production	About $2,100 to $2,360, before SMART and the state tax credit	Computed from EIA, as of 2026
Average installed cost	About $2.96 per watt before incentives	EnergySage Massachusetts, as of 2026
Typical payback period	About 7 to 8 years, and Medford’s high local rate plus SMART can shorten it	EnergySage Massachusetts, as of 2026

A worked Medford payback, computed here. By MySolarFY’s August 2026 estimate, a 6 kW system at about $2.96 per watt runs roughly $17,760 before incentives, and the Massachusetts 15% credit trims $1,000 off, leaving about $16,760. Divided by the roughly $2,100 to $2,360 a year that its 7,817 kWh offsets at Medford’s rate, that is a payback of about 7 to 8 years before the SMART payment, which shortens it further (EnergySage; EIA, as of 2026). This is a MySolarFY estimate on a standard system, not a quote; see how we compute these estimates and confirm your own numbers with a local installer.

Medford’s hills, trees, and the Fells: what shading does to your roof

Shading is Medford’s defining solar variable, more than any single program. The city is hillier and more wooded than the flat cities next door. Medford climbs into real hills around Pine Hill and the 2,200-acre Middlesex Fells Reservation, and much of it sits under a mature tree canopy (Mass.gov DCR, as of 2026). Big trees and a north-facing or steeply pitched hillside roof can cut production well below the 7,817 kWh a clear 6 kW roof models at this ZIP, so in Medford the first question is usually how much unshaded, well-oriented roof you actually have.

What to do about it before you sign anything. A good Medford installer runs a shading analysis with a tool like a Solar Pathfinder or drone imagery, not just a satellite guess, because a single tall oak on the south side changes the array size and the payback. Trimming or removing a tree you own can help, though trees inside the Fells or on city land are protected, so plan the array around them. If your best roof faces east or west rather than south, panels still produce, just less, and the SMART payment and net metering still apply to every kilowatt-hour you make.

Not sure how much sun your Medford roof gets? Check your ZIP and compare local installers →

Tufts, two-families, and who controls the Medford roof

Most of Medford is owner-occupied, but the Tufts area is the exception. About 54.1% of Medford homes are owner-occupied (Data USA, U.S. Census ACS, as of 2024), higher than in renter-majority Somerville, so in much of the city a single homeowner can decide to go solar. The exception is the neighborhood around Tufts University, whose campus straddles the Medford and Somerville line, where two-family and multi-family homes are often rentals or owned by absentee landlords (Tufts University, as of 2026).

Match your situation to the path. If you own a single-family home or an owner-occupied two-family, your path is the standard one in this guide: National Grid net metering plus SMART plus the Massachusetts tax breaks. If you own a two-family or a unit you rent out near Tufts, you can still install, and you keep the SMART payment and the state tax credit as the owner, but factor the roof and the tenant into the plan. If you rent, you cannot install on someone else’s roof, but you can send this to your landlord, since the owner is the one who earns the SMART payment and the tax credit.

The City of Medford permit step, and its 2019 solar ordinance

Your install runs through the City of Medford Building Department. Rooftop solar in Medford needs a building permit and an electrical permit, filed with the City of Medford Building Department at City Hall, Room 115A, with applications submitted online (City of Medford Building Department, as of 2026). A good local installer handles this filing for you, but it is worth knowing the step exists so a quote that skips it stands out.

One local detail worth knowing: Medford has its own solar ordinance, but it is not aimed at your house. In October 2019 the city passed a solar ordinance that requires solar on large new construction and major rehab projects over 10,000 square feet or with 10 or more residential units, with a solar plan approved by the city’s Director of Planning, Development, and Sustainability (City of Medford solar ordinance, as of 2026). A standard single-family or two-family rooftop retrofit is not covered by that ordinance, so it does not add a step for most homeowners, but it signals a city that actively supports solar. Medford also runs a Community Electricity Aggregation program, which sets your default supply rate but does not change how net metering or SMART pay your panels.

Your Medford utility is National Grid, and how it credits your solar

Your electric utility in Medford is National Grid, not Eversource. National Grid (Massachusetts Electric Company) administers your net metering here. So your electricity and your solar credits run through National Grid even though neighboring Somerville, Cambridge, and Boston are Eversource (Mass.gov Find My Electric Company, as of 2026). When your panels make more than your home uses, the extra flows to the grid and National Grid credits your account in dollars, and those credits roll forward month to month for a standard residential system (Mass.gov net-metering guide, as of 2026). For the mechanics in general, see how net metering credits your solar exports, and for the utility-level detail, our National Grid Massachusetts net metering guide.

What a net-metering credit is worth here. Residential solar in Massachusetts is a Class I facility, and its net-metering credit is built from the retail bill components, basic service plus distribution plus transmission, so it lands near the full retail per-kWh value and excludes only fixed customer charges (Mass.gov net-metering guide, as of 2026). Small home systems sit well under the 25 kW cap-exemption threshold, so a normal Medford home is never shut out of net metering (Mass.gov, as of 2026). That near-retail credit is why a high-rate area like Medford is a strong place to export solar.

What you earn from a Medford system	How it is valued	Who receives it
Monthly net-metering credits	Near full retail value under the Class I net-metering rules	The National Grid account holder
Leftover credit balance	Rolls forward as a dollar credit month to month	The account holder
SMART payments	A per-kWh production incentive over a 20-year term	The system owner

How Massachusetts SMART pays a Medford system, with more for income-eligible homes

SMART pays you per kilowatt-hour you generate, on top of your bill savings. It is separate money from net metering, so your production earns twice. Massachusetts runs the SMART program (Solar Massachusetts Renewable Target), and new systems now enroll under the SMART 3.0 framework, with Program Year 2026 open and accepting residential applications (Mass.gov SMART 3.0, as of 2026). For a residential system, the per-kWh incentive is locked in for a 20-year term, paid by the utility as a check or a bill credit, with your installer filing the application. It stacks on top of net metering, so your production earns twice.

The income-eligible rate is higher, which can matter for Tufts-area rentals and two-families. SMART 3.0 pays an enhanced per-kWh incentive to income-eligible households on top of the standard residential rate (Mass.gov SMART 3.0, as of 2026). Medford’s median household income is high, near $129,540 (Data USA, as of 2024), so many owner-occupants will earn the standard rate, but a lower-income household or a qualifying rental can earn the enhanced one. The exact figure is reset each Program Year, so treat any specific number as a moving target and confirm the current Program Year 2026 value with your installer. For the statewide detail, see our Massachusetts net metering and SMART guide.

How Massachusetts pays your Medford solar	What it does	How it is paid	How long
National Grid net metering	Credits the grid power you offset and export	Dollar credit on your bill, near full retail	Ongoing, while you own the system
SMART, standard residential	Pays you per kWh you generate	Utility check or bill credit	Fixed 20-year term
SMART, income-eligible	A higher per-kWh production rate for qualifying households	Utility check or bill credit	Fixed 20-year term
Massachusetts income-tax credit	One-time credit on your state return	15% of net cost, up to $1,000	One time (3-year carryforward)

Massachusetts solar incentives on a Medford account

On top of net metering and SMART, Medford homeowners get the same statewide tax benefits, and they go to whoever owns the system. That ownership point matters if you lease, because then the leasing company keeps these benefits.

• A state income-tax credit worth 15% of the net system cost, capped at $1,000, with up to a 3-year carryforward of any unused amount, claimed on Schedule EC (Mass.gov residential energy credits; M.G.L. c.62 s.6(d), as of 2026). The $1,000 cap is a lifetime limit per principal residence.
• A 100% sales-tax exemption on qualifying solar equipment, off the state’s 6.25% rate (DSIRE Massachusetts, as of 2026).
• A 20-year property-tax exemption on the added home value from a qualifying system, under Clause 45, which matters in a high-value market like Medford where the median home is around $755,500 (M.G.L. c.59 s.5, Clause Forty-fifth; Data USA, as of 2026).

Because these benefits are statewide, we keep the full detail on our solar costs and incentives across Massachusetts guide and our how solar incentives work explainer rather than repeating all of it here.

What the end of the federal tax credit means for Medford

The federal homeowner credit is gone, but none of the Massachusetts programs are. The 30% federal Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, under the One Big Beautiful Bill Act. So a Medford homeowner who buys solar with cash or a loan in 2026 cannot claim that 30% federal credit (IRS Residential Clean Energy Credit; SEIA, as of 2026). You will still see installer pages asking whether the 30% credit is going away; the accurate answer for 2026 is that the homeowner version already ended after 2025. For the full picture, see what the federal solar tax credit change means in 2026.

One federal credit still exists, but it is not yours to claim. A separate commercial credit, Section 48E, is claimed by the business that owns a leased or PPA system, not by the homeowner (IRS Clean Electricity Investment Credit, as of 2026). So on a lease or PPA, the company that owns the panels takes that credit. The 25D homeowner credit, by contrast, ended after December 31, 2025. The good news for Medford is that the federal change did not touch National Grid net metering, the SMART payment, or the state tax benefits. MySolarFY does not provide tax advice; confirm your situation with a tax professional.

Paying for solar in Medford: cash, loan, lease, and PPA

How you pay decides who keeps the incentives. If you own the system with cash or a loan, the SMART payments and the Massachusetts tax benefits are yours. A lease or PPA can mean no up-front cost for eligible homeowners, but it is a long-term agreement with monthly payments, solar panels are not free, and the company that owns the panels keeps the SMART payment and the state tax credit. On a Tufts-area two-family you rent out, you are the owner, so ownership financing keeps those benefits with you.

Path	Up-front cost	Who keeps SMART + MA tax credit	Best when
Cash purchase	Full system cost	You, the owner	You want the fastest payback and the most lifetime value
Solar loan	Little to none, financed	You, the owner	You want ownership, and the income-eligible SMART rate, without paying cash up front
Lease or PPA	$0-up-front where eligible	The third-party owner	You prefer no up-front cost and a simpler, fixed monthly bill

How to choose a solar installer in Medford

In Medford, installer screening is partly about shading and the roof. Hilly lots, a heavy tree canopy, and older single-family and two-family roofs mean the first questions are how much unshaded roof you have, how a specific pitch and direction perform, and whether trees need work. Rather than chasing a “best installer” list, screen any company against objective criteria:

• NABCEP certification, the industry’s professional standard for solar installers.
• A valid Massachusetts Home Improvement Contractor (HIC) registration and the proper electrical licensing.
• Real experience with National Grid interconnection, the SMART application (including the income-eligible rate if you qualify), and City of Medford Building Department permitting.
• A site-specific shading study, not just a satellite outline, plus a clear roof-condition assessment and a written workmanship and equipment warranty, which matter on older, tree-shaded Medford roofs.
• A written production estimate and a transparent quote that uses today’s SMART value, not an old one, and does not count the federal homeowner credit that ended after December 31, 2025.

For a fuller checklist, see the right questions to ask a solar installer. MySolarFY matches you with licensed installers that serve the Medford area so you can compare real local quotes side by side, with no obligation. For nearby cases, our Woburn solar guide covers another National Grid city next door, while our Somerville solar guide and Cambridge solar guide cover the neighboring Eversource cities.

See which licensed Medford installers serve your ZIP →

Frequently asked questions

Is solar worth it in Medford, Massachusetts? For most Medford homes with a sunny, unshaded roof, yes. Massachusetts residential electricity averages about 30.21 cents per kWh all-in (EIA, as of March 2026), among the highest in the country, so every kilowatt-hour your roof makes offsets an expensive grid one. By our August 2026 estimate, a 6 kW system at a Medford ZIP produces about 7,817 kWh in its first year (NREL PVWatts, as of 2026). National Grid net metering credits a home near full retail value, and SMART adds a per-kWh payment on top for 20 years. The main Medford variable is shading, since the city’s hills and tree canopy near the Middlesex Fells can cut what a given roof produces.

Who is my electric utility for solar in Medford? National Grid. Medford sits in National Grid’s (Massachusetts Electric Company) electric territory, so net metering for a Medford home is administered by National Grid, not Eversource, even though neighboring Somerville, Cambridge, and Boston are Eversource cities (Mass.gov Find My Electric Company, as of 2026). Your interconnection and your SMART payments both run through National Grid.

Do I need a permit to put solar on my Medford house? Yes. Rooftop solar in Medford needs a building permit and an electrical permit, filed with the City of Medford Building Department at City Hall, Room 115A, with applications submitted online (City of Medford Building Department, as of 2026). Medford also has a 2019 solar ordinance, but it applies to large new construction and major rehab projects, not to a standard single-family or two-family rooftop retrofit. A good local installer files the permit for you.

Do trees and the Middlesex Fells hurt solar in Medford? They can, which is why shading is the key question here. Medford is hillier and more wooded than the flat cities next door, climbing into Pine Hill and the 2,200-acre Middlesex Fells Reservation (Mass.gov DCR, as of 2026), so a roof shaded by tall trees or a steep north-facing pitch will produce less than the 7,817 kWh a clear 6 kW roof models at this ZIP. Panels still work on east or west roofs, just at lower output. Get a site-specific shading study before you compare quotes, because two homes on the same street can model very different production.

What is the SMART program and how much does it pay? SMART (Solar Massachusetts Renewable Target) is the state’s per-kWh solar production incentive, now running as SMART 3.0 with Program Year 2026 open (Mass.gov SMART 3.0, as of 2026). An eligible residential system earns a per-kWh payment locked for a 20-year term, paid as a utility check or bill credit, with your installer filing the application. It is separate from net metering, so you collect it on top of your bill credits. The state resets the rate each Program Year and income-eligible households earn a higher rate, so confirm the current value, and whether you qualify, with your installer before you sign.

Is the 30% federal solar tax credit gone for 2026? Yes, for homeowners. The 30% federal Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025 under the One Big Beautiful Bill Act, so a Medford homeowner who installs solar in 2026 cannot claim it (IRS; SEIA, as of 2026). You will see search results asking whether the credit is being taken away; the accurate answer is that the homeowner version already ended after 2025. A separate commercial credit, Section 48E, can apply to a leased or PPA system, but the business that owns it claims the credit, not you. Massachusetts net metering, SMART, and the state tax benefits were not affected. MySolarFY does not provide tax advice; confirm your situation with a tax professional.

Reviewed by SolarFY Editor, August 2026. Figures were verified against the linked EIA, Mass.gov (DOER/DPU/DCR), DSIRE, the U.S. Census Bureau, the City of Medford, NREL, and IRS sources as of August 2026; the SMART value and term, the income-eligible rate, net-metering credit values, and Medford permit details can change, so confirm current terms with National Grid, the state SMART program, the City of Medford, and your installer before you decide. MySolarFY does not provide tax or financial advice; consult a licensed professional about your own situation. Learn more about the MySolarFY editorial team and our data and methodology.

MySolarFY is a free service that matches homeowners with licensed solar installers. We are not an installer, financing company, tax advisor, or government program, and we do not provide tax advice. The federal residential solar tax credit (Section 25D) ended for systems placed in service after December 31, 2025, so homeowners who install solar in 2026 cannot claim it. “No up-front cost” refers to qualifying lease or PPA financing, where eligible homeowners may have no out-of-pocket cost at installation; lease and PPA terms typically run 20 to 25 years, may include an annual price escalator, and total payments may exceed the cost of a cash purchase, and on a lease or PPA the SMART payment and tax benefits go to the company that owns the system, not the homeowner. Solar panels are not free and monthly payments apply. Incentives, savings, and rates vary, change over time, and are not guaranteed. See our full disclaimer.