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Massachusetts homeowners and renters have two solar paths: install panels on your roof or subscribe to a community solar farm under SMART 3.0. With the residential ITC dead (25D expired Dec 31, 2025) and MA electricity rates above $0.35/kWh, the right choice depends on your living situation, roof condition, and budget. Use our calculator below to see your personalized comparison.
$0.36-$0.45
MA Electric Rate Range/kWh
$3.10/W
Avg Rooftop Solar Cost
10-15%
Community Solar Discount
$0
Federal ITC (25D Expired)
Rooftop solar saves 4-7x more money over 25 years. A cash-purchased rooftop system delivers $65,000-$95,000 in total value versus $6,500-$19,500 from community solar. Even without the federal tax credit (Section 25D expired December 31, 2025), Massachusetts offers 1:1 net metering, SMART 3.0 payments, ConnectedSolutions battery revenue, and generous state tax exemptions that make rooftop the dominant financial choice for homeowners with suitable roofs.
Community solar wins on accessibility. If you rent, own a condo, have a deteriorating roof, or cannot install panels for any reason, community solar under SMART 3.0 gives you 10% bill savings (20% for low-income) with zero upfront cost and zero installation. It is the only solar option for roughly 40% of Massachusetts households.
Use the calculator below to see your personalized comparison based on your monthly bill, roof condition, and utility company. The numbers update instantly.
Enter your monthly bill, roof condition, and utility to see a personalized side-by-side comparison. All calculations use real 2026 Massachusetts data.
Recommended: Rooftop Solar
With a good roof, rooftop solar is the clear winner. You will save $73k net over 25 years after system cost -- roughly 6x more than community solar.
Panels on your roof
25-Year Total Savings
$90,276
Net after system cost: $72,916
Pros
Cons
Subscribe to a solar farm
25-Year Total Savings
$9,995-$14,993
10-15% discount on electricity bill
Pros
Cons
Rooftop (Net of Cost)
$72,916
Community Solar
$14,993
Rooftop Advantage
5x more
Based on Eversource rate of $0.359/kWh, 5.6 kW system at $3.1/W, 90% bill offset, SMART 3.0 at $0.03/kWh for 20 years, 4% annual rate escalation. Federal 25D ITC expired -- $0 for cash/loan purchases. Community solar assumes 10-15% bill discount.
Rooftop solar means installing photovoltaic panels directly on your home. The system generates electricity from sunlight, powering your home first. Any excess electricity is exported to the grid, and you receive 1:1 retail-rate net metering credits on your Eversource, National Grid, or Unitil statement. Massachusetts is one of the few states where net metering credits equal the full retail rate for residential systems up to 25 kW (Class I), making rooftop solar exceptionally valuable.
In 2026, the average Massachusetts solar installation costs $3.00-$3.40 per watt. A typical 11 kW system runs $33,000-$37,400. The federal residential solar tax credit (Section 25D) expired December 31, 2025 under the One Big Beautiful Bill Act, so homeowners buying with cash or a loan receive $0 in federal credits. However, Massachusetts offers the strongest state-level incentive stack in the country.
Add a battery storage system and unlock ConnectedSolutions demand response revenue. You earn cash for discharging your battery during peak grid events.
ConnectedSolutions is only available to rooftop solar owners with physical battery storage. Community solar subscribers cannot participate. Unitil does not offer this program.
The rooftop solar installation process in Massachusetts typically takes 2-4 months from contract signing to grid interconnection. This includes site assessment, engineering design, permitting, installation (1-3 days of actual work), utility inspection, and meter swap. The SMART 3.0 enrollment process runs concurrently and activates once your system passes inspection. Once operational, a well-sized system offsets 80-100% of your electric bill.
For homeowners who want $0 down, the solar lease or PPA route remains viable in 2026. A third-party owner (TPO) installs and owns the system on your roof. The TPO claims the Section 48/48E commercial ITC (still available for projects beginning construction before July 4, 2026) and passes the savings to you as a lower fixed monthly payment. You pay less than your current utility bill from day one. While total savings over 25 years are lower than a cash purchase ($25,000-$40,000 vs $65,000-$95,000), the lease/PPA still delivers 2-4x more value than a community solar subscription.
If you own your home and have a suitable roof (south or west facing, good condition, minimal shade), rooftop solar is the highest-value solar option in Massachusetts. Cash purchase delivers the best 25-year ROI. Lease/PPA offers $0 down with still-strong savings. The only scenarios where rooftop does not make sense are rental housing, poor roof condition, heavy shading, or historic district restrictions. For more detail, see our full community solar vs rooftop comparison.
Community solar in Massachusetts operates under the SMART 3.0 Community Shared Solar program, administered by the Department of Energy Resources (DOER). Instead of installing panels on your property, you subscribe to a share of a local solar farm. That farm generates electricity and feeds it into the grid. Your portion of the production appears as a credit on your Eversource, National Grid, or Unitil bill each month.
The community solar developer charges you a subscription fee that is less than the value of the credits you receive, creating a net savings of 10% for market-rate subscribers and 20% for low-income qualified subscribers. You never see the solar farm -- it might be located miles away on agricultural land in Western Massachusetts, a capped landfill on the South Shore, or a commercial rooftop in Central Mass. All that matters is that the farm is within the same utility territory as your home.
Community solar in MA is growing rapidly. As of 2026, there are hundreds of operational community solar farms across the state, with the strongest availability in Eversource and National Grid territories. Unitil territory has fewer options due to the smaller service area around Fitchburg. Municipal light plant customers (Braintree, Wellesley MLP, Reading MLP, etc.) are generally not eligible for SMART community solar.
The financial mechanics are straightforward but important to understand. The community solar farm developer receives the SMART 3.0 Community Shared Solar Adder of $0.07/kWh plus any applicable bonus adders (low-income, storage, location-based, agricultural dual-use). The developer also claims the Section 48/48E commercial ITC and MACRS depreciation. All of these revenue streams go to the developer -- not the subscriber. Your savings come exclusively from the gap between the bill credits you receive and the subscription fee you pay. This is why community solar delivers a smaller total savings than rooftop: you are sharing the economics with the developer rather than capturing everything yourself.
Community solar subscribers do not receive SMART payments directly, cannot participate in ConnectedSolutions, do not receive the MA state tax credit or sales tax exemption, get no property tax exemption, and add zero equity to their home. These missing benefits are the primary reason rooftop solar delivers 4-7x more total value. Community solar is about access and convenience, not maximizing financial return. For a deeper dive, see our full MA community solar guide.
One requires a significant investment. The other requires nothing. But over 25 years, the investment pays back several times over.
Lease/PPA: $0 upfront. TPO claims 48E ITC and passes savings as lower monthly payment.
You pay a subscription fee but it is always less than the bill credits you receive. Net savings: 10% (market) or 20% (low-income).
Community solar costs nothing. Rooftop solar costs $30,000-$34,000 net (cash). But that investment generates $65,000-$95,000 in total value over 25 years -- a 2-3x return on your money. Community solar generates $6,500-$19,500 total. The question is not which costs less -- it is whether you are in a position to make the investment. If you can afford rooftop (or use a lease/PPA for $0 down), the math overwhelmingly favors it. For financing options, see our cash vs loan vs lease comparison.
Based on an 11 kW rooftop system, $200/month electric bill on Eversource, and 4% annual rate escalation. These numbers illustrate the typical difference.
Rooftop Solar (Cash)
$65K-$95K
Total 25-year value
Net metering savings + SMART income + tax benefits + ConnectedSolutions + home equity
Rooftop Solar (Lease/PPA)
$25K-$40K
Total 25-year value
$0 down. TPO claims 48E ITC. Savings passed as lower monthly payment. Day-one benefit.
Community Solar
$6.5K-$19.5K
Total 25-year value
10-20% bill credit savings only. No equity, no SMART income, no battery revenue.
Rooftop solar captures five revenue streams that community solar does not: (1) 1:1 net metering at the full retail rate, (2) SMART 3.0 direct payments for 20 years, (3) ConnectedSolutions battery revenue, (4) MA tax exemptions (state credit, sales tax, property tax), and (5) home equity increase of $20K-$30K. Community solar subscribers receive only a discounted bill credit. The solar farm developer captures all the SMART adders, ITC, and depreciation benefits. This structural difference means rooftop will always produce a higher total return for the homeowner.
The right choice depends entirely on your living situation, roof condition, and timeline. Here is a decision framework.
Not sure yet? Subscribe to community solar now for immediate 10% savings while you evaluate rooftop. You can cancel with 30-90 days notice and switch to rooftop at any time. Many homeowners use community solar as a bridge while they plan a roof replacement, save for a cash purchase, or wait for a rooftop installer opening. For renter-specific strategies, see our solar for renters and condos guide.
The SMART 3.0 program provides several incentive adders that make community solar projects financially viable for developers. Understanding these helps explain why your bill discount is structured the way it is. These adders go to the solar farm operator -- not to subscribers -- but they are what enable the subscription model to work. For the full SMART breakdown, see our SMART 3.0 program guide.
| Adder | Amount | Recipient | Details |
|---|---|---|---|
| Community Shared Solar Adder | $0.07/kWh | Solar farm owner | Base adder for SMART 3.0 community solar projects. Paid to the project developer, not the subscriber. |
| Low-Income Community Shared Adder | $0.06/kWh (additional) | Solar farm owner (passes to subscribers) | Projects serving low-income customers receive this adder on top of the community shared adder. Subscribers get 20% bill discount instead of 10%. |
| Storage Adder | $0.04/kWh | Solar farm owner (if battery paired) | Community solar farms with battery storage qualify for the storage adder. Does not apply to residential rooftop. |
| Location-Based Adder | Varies by substation | Solar farm owner | Projects in grid-constrained areas receive higher compensation. Published by each utility quarterly. |
| Agricultural Dual-Use Adder | $0.06/kWh | Solar farm owner | Agrivoltaic community solar farms that combine solar and farming operations qualify for this additional incentive. |
These adders make community solar farms profitable for developers, which is why they can offer you a bill discount. But the economics are clear: the developer captures most of the value (SMART adders + ITC + depreciation), and you receive a 10-20% bill savings. By comparison, rooftop solar owners capture SMART income directly ($0.03/kWh for 20 years), keep all net metering credits, and benefit from tax exemptions and home equity gains. The structural difference in who captures value is why rooftop delivers 4-7x more total return.
Both options require an Eversource, National Grid, or Unitil account. Municipal light plant customers are generally not eligible for either SMART program option.
| Criteria | Rooftop Solar | Community Solar |
|---|---|---|
| Property Type | Single-family home or townhouse with suitable roof | Any -- apartments, condos, rentals, single-family |
| Roof Requirements | South/west-facing, 10+ years remaining, minimal shade | None -- no roof access needed |
| Credit Score | None (cash) / 660+ for loans / varies for PPA | None required for most programs |
| Utility Territory | Eversource, National Grid, Unitil (not municipal) | Eversource, National Grid, Unitil (not municipal) |
| Contract Length | 25-year warranty (you own it), 20-25 year lease/PPA | 12-month to 20-year subscriptions available |
| Income Requirement | None (low-income gets $0.06/kWh SMART rate) | None (low-income gets 20% discount vs 10%) |
Low-income qualified households in Massachusetts receive enhanced benefits from both paths. Rooftop solar owners get $0.06/kWh SMART rate (double the standard $0.03/kWh). Community solar subscribers get a minimum 20% bill discount (double the standard 10%). If you qualify as income-eligible, both options become even more attractive. See our solar for renters and condos guide for income qualification details.
Your utility determines your rate, ConnectedSolutions eligibility, and community solar farm availability. Here is how the rooftop vs community solar comparison plays out for each Massachusetts investor-owned utility.
$0.359/kWh
~55% of MA customers
Rooftop: Strong ROI with ConnectedSolutions battery revenue up to $3,250/year. High community solar farm availability in Eastern and Western MA.
Community: Best availability of all three utilities. Savings of $30-$45/month on $300 bill.
$0.39/kWh
~35% of MA customers
Rooftop: High rate plus ConnectedSolutions battery revenue at $225/kW summer. The pairing of a strong rate and battery income makes the most complete rooftop package in the state.
Community: Good availability in Central and Western MA. Savings of $30-$45/month on $300 bill.
$0.45/kWh
~5% of MA (Fitchburg area)
Rooftop:Highest residential rate of the three MA IOUs means the fastest simple payback. Net metering at 1:1 retail. No ConnectedSolutions, so cash purchase is preferred since there's no battery revenue to offset loan interest.
Community: Limited farm availability in territory. Savings of $30-$45/month on $300 bill.
Whether rooftop or community solar is right for you, the first step is the same: understand your options with real numbers based on your home, roof, and utility. Get a free, no-obligation assessment in 60 seconds.