Lowell has two things that make rooftop solar pay: some of the most expensive grid electricity in the country, and a net-metering program that still credits what your panels send back at the full retail rate. The wrinkle is local. A mill city built around the Lowell National Historical Park has more protected streets than a typical suburb, so where your home sits can decide whether your roof needs a design review before a permit. This page covers what solar really costs in Lowell at National Grid’s rates, the Massachusetts incentives that actually apply to a homeowner in 2026 (the SMART program, the $1,000 state credit, and the tax exemptions), how National Grid net metering works, and what the Lowell Historic Board means for your project. Updated for June 2026.
Lowell solar in 2026, the essentials
- National Grid still credits your solar at the full retail rate, one to one. Residential Class I systems up to 10 kW earn a one-to-one net-metering credit on what they export, and the credit rolls over month to month (National Grid tariff M.D.P.U. No. 1625, effective March 1, 2026).
- Massachusetts power is among the priciest in the nation, which is what makes solar pay. Residential electricity averages about 30.21 cents per kWh (EIA retail sales, March 2026), roughly double the US average, so every kilowatt-hour your roof makes offsets an expensive one.
- Massachusetts still has a state income-tax credit, worth up to $1,000. The Residential Renewable Energy Income Tax Credit (Schedule EC) equals 15% of your net system cost or $1,000, whichever is less, and unused credit carries forward up to three years (830 CMR 62.6.1, as of 2026).
- The SMART program pays you per kilowatt-hour you produce. National Grid is one of the three Massachusetts utilities that administer SMART, which adds a production incentive on top of net metering, with an extra adder for battery storage (SMART 3.0 program details, Mass.gov, as of 2026).
- In a Lowell historic district, your roof may need design review first. The Lowell Historic Board reviews exterior changes in the Downtown Lowell Historic District, the Acre Neighborhood District, and the Andover Street Neighborhood District (City of Lowell Review Districts and Permitting, as of June 2026).
- The federal homeowner credit is gone. The 30% federal Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025 (IRS, as of January 1, 2026), so a 2026 Lowell buyer who pays cash or finances cannot claim it.
Why Lowell electric bills make solar pay
The case for solar in Lowell starts with the price of grid power, and in Massachusetts that price is brutal. Residential electricity in the state averages about 30.21 cents per kWh (EIA, March 2026), close to double the national average and among the highest of any state. National Grid credits the power your roof exports against that full retail rate, so every kilowatt-hour you generate cancels an expensive one you would otherwise buy. A Lowell home spending $150 or more a month on electricity is a strong candidate, and the city’s mix of older triple-deckers and single-family homes with electric-hungry summers and winters tends to run real usage. Read the supply and delivery lines on your National Grid bill to find your own all-in rate, because the delivery side has climbed as fast as supply.
Production is the other half of the math. A typical, well-oriented eastern-Massachusetts rooftop array produces roughly 1,150 kilowatt-hours a year for every kW of panels, a regional estimate from NREL’s PVWatts model for the Lowell latitude rather than a live reading for your roof (our address-level lookup was unavailable at publish time, so treat this as a modeled estimate, as of 2026). New England sees real winter and cloud losses, so Lowell production runs a bit below the Sun Belt, but the very high price per kilowatt-hour more than makes up for it. Your real output depends on roof pitch, orientation, and shading, so run PVWatts for your own address before sizing a system.
See what solar programs are available in your Lowell ZIP code
Solar incentives, net-metering credits, installer availability, and electric rates change by utility and location. Enter your ZIP and we’ll match you with licensed installers who serve your area.
Free to check. About a minute. No credit pull to check.
Submitted securely and used to match you with licensed installers in your area. Some homeowners may qualify for $0-up-front lease/PPA options where available.
What solar costs in Lowell, and when it pays back
Here is the local math, built from the figures on this page. We value each kilowatt-hour at the Massachusetts residential rate, apply a typical eastern-Massachusetts production band against a typical installed price, and subtract the $1,000 state income-tax credit. Massachusetts charges no sales tax on the equipment, so there is no 6.25% to add on top. Treat this as a planning estimate, not a quote, and note that it leaves out the SMART production incentive (covered below), which shortens the payback further.
Assumptions: each kW of panels produces about 1,150 kWh per year (an NREL PVWatts regional estimate for eastern Massachusetts, as of 2026); each kWh is valued at the 30.21 cent Massachusetts residential rate (EIA, March 2026), because National Grid net metering credits exports at the full retail rate; an installed price of about $3.25 per watt before incentives, a typical Massachusetts figure (EnergySage Lowell cost data, as of 2026); and the Massachusetts $1,000 income-tax credit. No federal credit is included, because the federal homeowner credit ended for systems placed in service after December 31, 2025.
| System size | Est. annual production | Est. first-year bill savings | Cost before incentives | After the $1,000 state credit | Simple payback |
|---|---|---|---|---|---|
| 6 kW | about 6,900 kWh | about $2,085 | $19,500 | $18,500 | about 8.9 years |
| 8 kW | about 9,200 kWh | about $2,780 | $26,000 | $25,000 | about 9.0 years |
| 10 kW | about 11,500 kWh | about $3,475 | $32,500 | $31,500 | about 9.1 years |
Note: This estimate holds today’s rate flat, ignores financing costs, and leaves out the SMART production incentive, so the real payback is usually shorter. Two Massachusetts factors push it down: SMART pays you per kilowatt-hour you produce on top of these bill savings, and National Grid rates have been rising, which raises the value of every kilowatt-hour you offset. As a rough sensitivity, a conservative 3% a year rise in rates shortens the 8 kW payback from about 9.0 years to roughly 8, before counting SMART; we also leave out the slow decline in panel output, around half a percent a year, which trims lifetime production a little the other way. Note that 10 kW is the cap for a residential Class I net-metering system, and that systems over 25 kW lose part of the state property-tax exemption, so most Lowell homes land in the 6 to 10 kW range modeled here. For the full method, see whether solar panels are worth it.
Massachusetts incentives for a Lowell homeowner in 2026
Massachusetts still hands homeowners a real incentive stack, which sets it apart from states that lean only on net metering. The value comes from four places: full-retail net metering, the SMART production incentive, the $1,000 state income-tax credit, and the sales- and property-tax exemptions. Each benefit goes to the system owner, so on a lease or PPA the company that owns the panels keeps the SMART payments and the tax benefits, while the net-metering bill credit follows your National Grid account.
| Incentive | What it is worth | Status for a Lowell home in 2026 |
|---|---|---|
| National Grid net metering | Full retail, one-to-one credit on exported kWh (residential Class I, up to 10 kW), rolling over monthly | Active (National Grid tariff M.D.P.U. 1625, eff. March 1, 2026) |
| SMART production incentive (SMART 3.0) | A per-kWh payment on what your system produces, set annually by DOER, with a battery-storage adder | Active. National Grid administers it; PY2026 applications are open (Mass.gov SMART 3.0) |
| Massachusetts income-tax credit (Schedule EC) | 15% of net system cost or $1,000, whichever is less, carried forward up to 3 years | Active (830 CMR 62.6.1) |
| Massachusetts sales-tax exemption | 100% of the 6.25% state sales tax on residential solar equipment | Active (MassCEC) |
| Massachusetts property-tax exemption (G.L. c.59 s.5 cl.45) | The added home value from solar is not taxed for 20 years (systems up to 25 kW, or up to 125% of your use) | Active (Mass. General Laws c.59 s.5) |
| Federal Residential Clean Energy Credit (Section 25D) | Was 30% of system cost | Ended for systems placed in service after December 31, 2025; not available to a 2026 homeowner (IRS) |
The SMART program is the ongoing-income piece, and National Grid is in it. Solar Massachusetts Renewable Target (SMART) pays a fixed per-kilowatt-hour incentive on everything your system produces, on top of the bill savings from net metering, and it is provided to customers of the three investor-owned utilities, Eversource, National Grid, and Unitil (National Grid incentives and programs, as of 2026). Under the SMART 3.0 redesign the residential rate is a flat value that DOER adjusts each program year rather than the old declining blocks, and adding a battery raises your incentive (Mass.gov SMART 3.0, as of 2026). The exact PY2026 residential rate is set by DOER and changes, so confirm the current value for your system with your installer or National Grid rather than banking on a number from a sales page.
Note: Net metering and SMART work together for most residential systems, but they are not the same lever, and the rules on how they interact matter. A solar facility cannot generate SMART alternative on-bill credits and net-metering credits at the same time (Mass.gov net metering guide, as of June 2026), so ask your installer exactly how your system will be compensated, and get the SMART value and the net-metering treatment in writing before you sign. For the statewide picture, see our Massachusetts solar guide and the solar incentives overview.
What the end of the federal homeowner credit means here
The federal homeowner credit is gone, but Massachusetts kept its own. 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, and the IRS treats the expense as made when installation is completed, so a Lowell homeowner who installs solar with cash or a loan in 2026 cannot claim it (IRS Residential Clean Energy Credit; SEIA, as of 2026). You will still see installer pages implying the 30% credit is available; the accurate answer for 2026 is that the homeowner version already ended. Unlike most states, though, Massachusetts still offers its own $1,000 income-tax credit, and net metering, SMART, and the tax exemptions were not affected, so the local case holds.
One federal exception exists, and it is not yours to claim. A separate commercial credit, Section 48E, can be claimed by the business that owns a leased or PPA system, not by the homeowner (IRS Clean Electricity Investment Credit, as of 2026). On a leased system you do not file for a federal credit yourself; the company that owns the panels does. The 25D homeowner credit, by contrast, ended after December 31, 2025. For the full timeline, see what the federal solar tax credit change means in 2026.
How National Grid net metering works in Massachusetts
Through 2026, National Grid credits your solar at the full retail rate, one to one. When your panels make more than you use, the extra flows to the grid and National Grid banks it as a kilowatt-hour credit, so you are billed only on your net usage, and a residential Class I system (up to 10 kW) earns that credit at the full retail rate (National Grid tariff M.D.P.U. 1625, effective March 1, 2026). Credits carry forward month to month. One thing net metering does not erase is the fixed part of your bill: the customer charge and any minimum monthly reliability contribution still apply, because those are not usage charges (Mass.gov net metering guide, as of June 2026). Massachusetts kept full-retail residential net metering rather than switching to a lower export rate, which is part of why the state remains a strong solar market.
| What happens | How National Grid handles it (residential Class I) |
|---|---|
| Your panels make less than you use | You buy the difference from the grid at the retail rate |
| Your panels make more than you use | The excess is banked as a full-retail kWh credit and carried forward |
| Leftover credit month to month | Carries forward on your account |
| Fixed charges | The customer charge and any minimum monthly reliability contribution still apply |
| System sizing | Residential Class I net metering covers systems up to 10 kW |
Because Massachusetts kept full-retail residential net metering, a system you connect in 2026 is credited the same way going forward, with no statewide sunset on the books like the one Maryland just passed. For how National Grid handles applications and interconnection, see the National Grid net metering and solar guide, and compare another National Grid mill city in how solar works in Worcester. For the mechanics in plain English, see how net metering credits your solar exports.
Solar in a Lowell historic district: who reviews your roof
Lowell adds a local layer that most suburbs do not: historic-district design review. The city is built around the Lowell National Historical Park, and the Lowell Historic Board reviews exterior changes, including rooftop solar, in the Downtown Lowell Historic District, the Acre Neighborhood District, and the Andover Street Neighborhood District (City of Lowell Review Districts and Permitting, as of June 2026). If your home is in one of those districts, plan for a board review before your building permit, and expect the board to care about how visible the panels are from the street. The City publishes its own step-by-step guide to the process, including the building and electrical permits every install needs, in its guide to installing solar in Lowell.
Note: Not every Lowell address sits in a review district, and many neighborhoods have no historic overlay at all, so the first question to settle is simply whether your street is covered. If it is, low-profile panels on a rear or less visible roof slope tend to clear review more easily than front-facing arrays, and an installer who has done Lowell historic-district jobs will know how to present the design. Lowell’s dense blocks of three-decker homes also sit close together, so a neighboring roofline or a mature street tree can shade part of an array, which is why a good installer runs a shade analysis for your specific roof before sizing the system. Either way, every Lowell solar install still needs the standard building and electrical permits through the city’s Development Services Division, so budget time for the paperwork even outside a historic district.
Paying for solar in Lowell: cash, loan, lease, or PPA
There is no single right way to pay for solar; the best fit depends on whether you want to own the system and keep the SMART payments and tax benefits yourself, or avoid an up-front cost. The table compares the common paths. A lease or PPA can mean no up-front cost for eligible homeowners, but it is a long-term agreement with monthly payments, not free solar, and the system owner, not you, keeps the SMART incentive and the tax benefits. To weigh the long-run numbers, see whether solar panels are worth it.
| Path | Up-front cost | Who keeps SMART and the tax benefits | Best when |
|---|---|---|---|
| Cash purchase | Full system cost | You, the owner | You want the fastest payback and the most lifetime savings |
| Solar loan | Little to none, financed | You, the owner | You want ownership 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 Lowell
Lowell sits in a competitive Massachusetts solar market, which is good for you on price and service. Rather than chasing a “best installer” list, screen any company against objective criteria:
- NABCEP certification, the industry’s professional standard for PV installers.
- A valid Massachusetts Home Improvement Contractor (HIC) registration and the right electrical licensing.
- A clear workmanship and equipment warranty in writing.
- Real experience with National Grid interconnection and, if your home is in a Lowell historic district, the Lowell Historic Board review, so the design review and permit move smoothly.
- A written production estimate and a transparent quote that reflects what actually applies to you: full-retail net metering, the SMART incentive, the $1,000 state credit, the tax exemptions, and the fact that there is no federal homeowner credit in 2026. For a checklist, see the right questions to ask a solar installer.
MySolarFY matches you with licensed installers that serve your area so you can compare real local quotes side by side, with no obligation.
Check which solar programs are available at your Lowell address →
Weighing your options across the area? Compare nearby solar markets with our local guides for Lynn and Lawrence.
Frequently asked questions
Is solar worth it in Lowell in 2026? For most owner-occupied Lowell homes with decent sun, yes. Massachusetts residential electricity averages about 30.21 cents per kWh (EIA, March 2026), among the highest in the country, and National Grid credits your exports at that full retail rate, so solar offsets expensive grid power. On bill savings alone our estimate puts simple payback near 9 years, and the SMART production incentive plus the $1,000 state credit shorten it further. Savings depend on your roof, usage, and how you pay, and are not guaranteed, but the very high local rate and intact full-retail net metering make Lowell a strong market right now.
What solar incentives can a Lowell homeowner get in 2026? Massachusetts has a real stack. National Grid net metering credits your exports at the full retail rate, the SMART program pays a per-kWh production incentive on what you generate, the state income-tax credit is worth 15% of cost or $1,000 (whichever is less), and the equipment is exempt from the 6.25% sales tax while the added home value is exempt from property tax for 20 years (Mass.gov SMART 3.0; 830 CMR 62.6.1, as of 2026). The federal homeowner credit ended after December 31, 2025, so it is not part of the 2026 math.
What happened to the 30% federal solar tax credit? 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 Lowell homeowner who installs solar with cash or a loan in 2026 cannot claim it (IRS, as of 2026). A separate commercial credit, Section 48E, can apply to leased and PPA systems, but the business that owns the system claims it, not the homeowner. Massachusetts kept its own $1,000 income-tax credit, plus net metering, SMART, and the tax exemptions, so the local payback case still holds. See our guide on what the federal solar tax credit change means in 2026.
How does National Grid net metering work in Massachusetts? Through 2026, National Grid credits your exported solar at the full retail rate, one to one, for a residential Class I system up to 10 kW, and bills you on your net usage (National Grid tariff M.D.P.U. 1625, effective March 2026). Credits carry forward month to month. The fixed part of your bill, the customer charge and any minimum monthly reliability contribution, still applies because those are not usage charges (Mass.gov net metering guide, as of June 2026). Massachusetts kept full-retail residential net metering instead of switching to a lower export rate, which is a big reason solar still pencils out in the state.
Do I need historic-district approval for solar in Lowell? Only if your property is in one of the city’s review districts. The Lowell Historic Board reviews exterior changes, including rooftop solar, in the Downtown Lowell Historic District, the Acre Neighborhood District, and the Andover Street Neighborhood District (City of Lowell Review Districts and Permitting, as of June 2026). If you are in one of those districts, expect a board review before your building permit, and favor low-profile panels on a less visible roof slope. Many Lowell addresses are not in a review district, but every install still needs the standard building and electrical permits through the city’s Development Services Division.
What is the SMART program, and can I combine it with net metering? SMART (Solar Massachusetts Renewable Target) pays a fixed per-kilowatt-hour incentive on everything your system produces, and National Grid is one of the three Massachusetts utilities that administer it (National Grid incentives; Mass.gov SMART 3.0, as of 2026). For most residential systems it works alongside net metering, which gives you the bill credit, while SMART pays on production. The two programs have interaction rules, and a facility cannot generate SMART alternative on-bill credits and net-metering credits at the same time (Mass.gov net metering guide, as of June 2026), so ask your installer to spell out exactly how your system will be compensated.
Can I get solar with no up-front cost in Lowell? Some homeowners can, through a lease or power purchase agreement (PPA) where eligible, which can mean no out-of-pocket cost at installation in exchange for monthly payments. This is not free solar; it is a long-term agreement, typically 20 to 25 years, that may include an annual price escalator, and total payments may exceed the cost of a cash purchase. On a lease or PPA the third-party owner, not you, keeps the SMART incentive and the tax benefits, and there is no homeowner federal credit in 2026, because the federal residential credit ended after December 31, 2025. If you want to own the system and keep those benefits, a cash purchase or solar loan is the path that does. Check what you qualify for before deciding.
Reviewed by the MySolarFY editorial team, June 2026. Figures were verified against the linked Massachusetts (Mass.gov DOER, MassCEC, Massachusetts General Laws), National Grid tariff, City of Lowell, EIA, NREL, and IRS sources as of June 2026; the SMART rate, net-metering terms, installed prices, and the historic-district process can change, so confirm current terms with National Grid, the City of Lowell, and your installer before you decide. Massachusetts production figures are NREL PVWatts regional estimates, not a live reading for your roof. MySolarFY does not provide tax or financial advice; consult a licensed professional about your own situation. See how the MySolarFY team sources and checks these figures.
MySolarFY is a free service that matches homeowners with licensed solar installers. We are not an installer, financing company, or government program. “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; on a lease or PPA the SMART incentive and tax benefits go to the company that owns the system, not the homeowner. Homeowners do not get the federal residential credit that ended after December 31, 2025. Solar panels are not free and monthly payments apply. Eligibility, savings, incentives, and rates vary and are not guaranteed. See our full disclaimer.
