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Boston is one of the best cities in America for solar. Eversource rates at $0.2836/kWh, 7 active incentive programs, and Section 48E lease/PPA options mean a 7.6-year payback -- even without the federal credit. Here is what it costs in your neighborhood.
Avg Cost
$3.16/W
11kW system
Payback
7.6 yrs
Cash purchase
Federal ITC
$0
Expired Dec 2025
Active Programs
7
State + local
2026 Reality: The 30% federal tax credit (Section 25D) expired for homeowners on December 31, 2025. All Boston solar costs and payback figures in this guide reflect $0 federal credit. However, Section 48E allows lease/PPA providers to claim a 30%+ commercial ITC through July 4, 2026. See Section 48E details
A typical 11kW solar system in Boston costs $34,760 before incentives. All of Boston is served by Eversource at $0.2836/kWh -- the highest rate in Massachusetts. Combined with SMART ($0.03/kWh (flat residential) for 20 years), 100% retail net metering, ConnectedSolutions battery revenue, and 4 more programs, solar pays for itself in 7.6 years and saves over $154,000 over 25 years. For the full incentive breakdown, see our post-ITC incentive guide.
Average Cost
$3.16/W
Fully installed
Payback
7.6 yrs
Cash purchase
25-Year Savings
$154K
Per system
Eversource Rate
$0.2836
Per kWh, rising ~5%/yr
The homeowner tax credit is gone -- but there is still a path to federal savings. Section 48E lets third-party solar companies claim a 30%+ commercial investment tax credit on systems they install and lease to you. That savings gets passed to you as a lower monthly lease or PPA rate. The catch? Construction must begin before July 4, 2026.
You sign a lease or PPA
A solar finance company installs panels on your roof. They own the system; you buy the power at a fixed rate.
Finance company claims 30%+ ITC
They claim the Section 48/48E investment tax credit (30% base + potential bonus adders for domestic content, energy community, or low-income).
You get a lower rate
Your lease/PPA rate is lower than your Eversource bill ($0.2836/kWh). Typical PPA rate: ~$0.18/kWh. You save from month one with $0 down.
Construction must begin by July 4, 2026
After this date, the commercial ITC may be reduced or eliminated. If you want this option, act now.
Factor
Cash Buy
48E Lease/PPA
Upfront Cost
$34,760
$0
Monthly Bill
~$0 (net metering)
~$198/mo at $0.18/kWh
Monthly Savings
~$227/mo
~$114/mo vs. Eversource
SMART Income
You keep it
Goes to finance co.
CS Revenue
You keep it
May be shared
Payback
7.6 years
Instant (day 1 savings)
25-Year Savings
~$154K
~$34K-$52K
You Own System?
Yes
No (until buyout)
Bottom line: Cash purchase delivers the best long-term ROI. Section 48E lease/PPA is best for homeowners who cannot or prefer not to pay $34,760 upfront and want immediate savings with $0 down.
The federal homeowner tax credit is dead, but Massachusetts has more active solar incentive programs than any other state. Here is every dollar available to Boston homeowners in 2026.
For the complete guide, see MA Solar Incentives After the ITC.
Guaranteed fixed income for 20 years. Low-income: $0.06/kWh. Battery adder: +$0.04/kWh.
Full retail rate for every kWh sent to grid. Eversource: $0.2836/kWh. Monthly rollover.
Eversource pays highest CS rates in MA. Requires enrolled battery. Tesla Powerwall, Enphase, SolarEdge all qualify.
Claimed on MA Form 1 Schedule EC. Caps at $1,000 regardless of system size.
Solar value excluded from property assessment for 20 years. At Boston's 10.88 mill rate, saves ~$378/yr on an 11kW system.
No sales tax on solar equipment or installation in MA. Saves ~$2,173 on a $34,760 system.
Finance company claims the commercial ITC (30%+) and passes savings as a lower lease/PPA rate. You own the savings, not the panels. Deadline: July 4, 2026.
Combining all 7 programs for an 11kW solar system with a 10kW battery (Eversource territory). The one-time credits (state tax credit, sales tax exemption) apply in year 1 only.
$10,496
Year 1 total value
All prices are fully installed with Tier 1 panels, microinverters, racking, permitting, and Eversource interconnection. No federal tax credit applied.
| System Size | Cost Range | Annual Production | Annual Savings | Payback | Best For |
|---|---|---|---|---|---|
| 5 kW | $15,500-$17,500 | 6,000 kWh | $1,702 | ~9.1 yrs | Condos, small row houses |
| 8 kW | $24,000-$27,200 | 9,600 kWh | $2,723 | ~8.1 yrs | Avg single-family |
| 10 kW | $30,000-$34,000 | 12,000 kWh | $3,403 | ~7.8 yrs | Larger home or EV |
| 11 kW(typical) | $33,000-$37,400 | 13,200 kWh | $3,744 | ~7.6 yrs | Avg Boston system |
| 13 kW | $39,000-$44,200 | 15,600 kWh | $4,424 | ~7.4 yrs | Triple-decker, ADU |
| 15 kW | $45,000-$51,000 | 18,000 kWh | $5,105 | ~7.2 yrs | Large home + EV + heat pump |
Savings include net metering credits and SMART income only. Add ConnectedSolutions battery revenue ($3,250/yr for a 10kW battery) for faster payback.
Model your exact costs, savings, and payback for any system size. Includes SMART 3.0, net metering, ConnectedSolutions, state tax benefits, and Section 48E lease/PPA comparisons. Default settings are pre-loaded for a typical Boston (Eversource) home.
Estimate your solar return on investment with SMART income, net metering credits, ConnectedSolutions, and MA tax benefits.
Federal Residential Solar Tax Credit (Section 25D) Expired
Homeowners who purchase solar with cash or a loan receive $0 in federal tax credits. Section 25D expired December 31, 2025.
Eastern MA (Boston, South Shore, Cape Cod, MetroWest, Western MA)
Electric Rate
$0.28/kWh
Net Metering
1:1 retail credit (Class I ≤25 kW)
SMART 3.0 Rate
$0.03/kWh
Interconnection
2-4 weeks typical
20-year exemption — solar adds $0 to your property tax
Payback Period
7
years
25-Year Savings
$114,687
total
Monthly Benefit
$378
per month
Estimates based on average 2026 MA solar pricing, SMART 3.0 $0.03/kWh residential flat rate, 1:1 retail net metering, 6.25% sales tax exemption, 20-year property tax exemption, and 15% state tax credit (max $1,000). Section 25D residential ITC expired Dec 31, 2025 — $0 federal tax credit for cash/loan purchases.
Every neighborhood in Boston has different housing stock, roof types, and permitting requirements. For statewide pricing context, see our MA solar cost guide. Here is what to expect in yours.
Triple-deckers & multi-family | Pop: ~125,000
Triple-deckers have large flat or low-slope roofs -- ideal for solar
Multi-unit buildings may need landlord/HOA approval
Higher energy usage (multiple units) means faster payback
Many buildings have 100-amp panels that need upgrading
SMART low-income adder may apply in designated census tracts
Best for: Landlords and owner-occupiers with triple-deckers
Typical System
8-13 kW
Cost Range
$25,300-$41,100
Roof Area
1,400 sq ft
Permitting
Standard ISD permit, no historic review
Row houses & condos | Pop: ~37,000
Row houses have smaller roofs but good sun exposure
Flat roofs on newer Seaport condos are ideal for flush-mount panels
Some row houses share fire walls -- panels must maintain setbacks
Condo associations must approve installations on shared roofs
Waterfront buildings may have wind load requirements
Best for: Row house owners and Seaport condo buildings
Typical System
5-8 kW
Cost Range
$15,800-$25,300
Roof Area
800-1,000 sq ft
Permitting
Standard ISD permit
Victorian homes & multi-family | Pop: ~40,000
Large Victorian roofs provide ample space, but steep pitches limit usable area
Tree coverage is high -- shade analysis is critical
Some streets have JP/Roxbury historic district restrictions
Older homes likely need 200-amp panel upgrade
Strong environmental community -- highest per-capita solar adoption in Boston
Best for: Victorian homeowners with south-facing roofs
Typical System
7-11 kW
Cost Range
$22,100-$34,800
Roof Area
1,200-1,800 sq ft
Permitting
ISD permit; historic review if in designated district
Historic brownstones | Pop: ~25,000
Boston Landmarks Commission (BLC) review required for exterior changes
Panels typically must not be visible from the public way
Flat rear roofs may be acceptable; front-facing panels usually denied
All-black panels and low-profile mounts improve approval chances
Worth pursuing -- Eversource rates at $0.2836/kWh make even small systems valuable
Community solar is the alternative if rooftop is not approved
Best for: Owners willing to navigate BLC review for long-term savings
Typical System
3-6 kW
Cost Range
$9,500-$19,000
Roof Area
600-1,000 sq ft
Permitting
ISD permit + BLC historic review (add 4-8 weeks)
Single-family homes | Pop: ~65,000
Suburban-style homes with large south-facing roofs
Lower tree density than JP -- better sun exposure
Most homes built post-1950 with adequate electrical panels
Highest residential solar density in Boston per capita
Excellent for ground-mount on larger West Roxbury lots
Best for: Families in single-family homes with large roof area
Typical System
9-14 kW
Cost Range
$28,400-$44,200
Roof Area
1,400-2,000 sq ft
Permitting
Standard ISD permit, fastest approval
Multi-family & new construction | Pop: ~47,000
Mix of older multi-family and new waterfront condos
New construction often has solar-ready electrical panels
Airport proximity does not affect solar installations
Environmental justice community -- qualifies for SMART low-income adder
Rapidly developing area with new solar-ready buildings
Best for: Multi-family owners and new condo developments
Typical System
6-11 kW
Cost Range
$19,000-$34,800
Roof Area
1,000-1,400 sq ft
Permitting
Standard ISD permit
Row houses & new development | Pop: ~18,000
Historic Charlestown Navy Yard area may have restrictions
Row houses on the hill have good south-facing exposure
New development in Thompson Square area is often solar-ready
Compact lots mean less tree shading than suburban neighborhoods
Best for: Row house and townhome owners
Typical System
5-9 kW
Cost Range
$15,800-$28,400
Roof Area
800-1,200 sq ft
Permitting
ISD permit; Navy Yard area may need additional review
Single-family & multi-family | Pop: ~65,000
Larger lots with more roof space than denser neighborhoods
Mix of housing stock from 1920s-1970s
Many homes need 200-amp panel upgrades (pre-1980 construction)
Environmental justice communities -- SMART low-income adder may apply
Some of the most affordable neighborhoods for solar adoption
Best for: Homeowners looking for affordable solar with EJ program benefits
Typical System
8-12 kW
Cost Range
$25,300-$37,900
Roof Area
1,200-1,600 sq ft
Permitting
Standard ISD permit
Multi-family & row houses | Pop: ~55,000
Designated environmental justice community -- higher SMART rates available
Mix of multi-family and row house construction with good roof access
Community solar programs particularly strong in this area
Several Roxbury census tracts qualify for SMART low-income rate ($0.06/kWh)
Section 48E lease/PPA especially advantageous -- no upfront cost needed
Best for: Income-eligible homeowners and multi-family building owners
Typical System
6-10 kW
Cost Range
$19,000-$31,600
Roof Area
1,000-1,400 sq ft
Permitting
Standard ISD permit
Multi-family & student housing | Pop: ~72,000
High rental density -- building owners benefit most from solar
Multi-family buildings with flat roofs are ideal candidates
Proximity to BU/BC creates high electricity demand
Some older apartment buildings need 200-amp service upgrades
Triple-deckers common along Commonwealth Ave corridor
Best for: Landlords and building owners with multi-family properties
Typical System
6-10 kW
Cost Range
$19,000-$31,600
Roof Area
1,000-1,400 sq ft
Permitting
Standard ISD permit
Dense urban & institutional | Pop: ~45,000
Dense urban area with tall buildings creating shading challenges
Mission Hill Triangle Architectural District requires BLC review
Newer apartment complexes may have rooftop solar potential
Community solar is often the better option for smaller units
High electricity rates make even small systems financially viable
Best for: Building owners in newer construction with flat roofs
Typical System
4-7 kW
Cost Range
$12,600-$22,100
Roof Area
600-1,000 sq ft
Permitting
ISD permit; Mission Hill area may need BLC review
Boston legalized Accessory Dwelling Units (ADUs) citywide in 2024. If you are building or planning an ADU, solar should be part of the conversation from day one.
ADU adds 3,000-6,000 kWh/year in electricity demand -- a larger solar system is now justified and pays back faster
Solar + ADU increases property value without increasing property tax (MA 20-year solar exemption)
ADU rental income + solar savings = two new revenue streams from one property
Eversource rates at $0.2836/kWh make the added demand expensive -- solar locks in a lower cost
New construction ADUs can be designed solar-ready (south-facing roof, conduit runs, panel capacity)
200-amp service required
Both ADU and solar need adequate amperage. Most pre-1980 Boston homes have 100-amp panels -- upgrading to 200-amp costs $1,500-$4,000.
Do both at once
If you are upgrading electrical for the ADU, add solar wiring at the same time. Combined permitting and trenching saves $500-$1,500.
System sizing
A main home using 8,000 kWh/yr plus an ADU at 4,000 kWh/yr needs a 10-13 kW system. At $3.16/W, that is $31,600-$41,100.
SMART qualification
Systems up to 25 kW qualify for SMART 3.0 at $0.03/kWh for 20 years -- larger ADU-driven systems still fit under the cap.
Property value tip: Massachusetts exempts solar installations from property tax assessment for 20 years. At Boston's 10.88 mill rate, your solar system adds approximately 4% to home value but your property tax bill stays the same. Combined with ADU rental income, this is one of the best return-on-investment moves a Boston homeowner can make. Learn more about MA solar tax exemptions
Historic district requirements add steps to the process but do not prevent solar installation. Here is how to navigate them. For the full statewide guide, see our MA Historic District Solar Guide.
Back Bay Architectural District
Brownstones only. Rear/flat roof panels preferred.
High difficultyBeacon Hill Historic District
Strictest oversight. Non-visible roofs only.
High difficultyBay Village Historic District
Smaller district, mixed approval record.
Medium difficultySouth End Landmark District (portions)
Row houses with flat rear roofs are usually approved.
Medium difficultyFort Point Channel Landmark District
Mostly commercial -- residential solar less common.
Low difficultyCharlestown Navy Yard (portions)
Newer construction often exempt from review.
Low difficultyMission Hill Triangle Architectural District
Multi-family buildings with flat roofs approved regularly.
Medium difficultyUse all-black panels and black mounting hardware
EssentialInstall on rear-facing or flat roofs not visible from the street
EssentialUse low-profile, flush-mount racking systems
EssentialSubmit detailed photos showing panel placement from street view
RequiredApply early -- BLC review adds 4-8 weeks to timeline
ImportantConsider a SPAN smart panel to maximize a smaller system
RecommendedSection 48E lease/PPA works for historic homes too -- no system ownership hassle
OptionCommunity solar as backup plan if rooftop is not approved
AlternativePro tip for Beacon Hill and Back Bay: Even if your rooftop is not approved, community solar lets you subscribe to a solar farm and receive bill credits. Same Eversource savings, no panels on your building. Also consider Section 48E lease/PPA for buildings where the finance company handles all BLC coordination.
Boston's Inspectional Services Department (ISD) handles all solar permits. Your installer manages the entire process.
1-2 weeks
Site survey, shade analysis, system design, engineering stamps.
1-2 weeks
Submit plans to Boston ISD. Standard permit for non-historic areas.
+4-8 weeks
BLC review for historic districts. Not required for most neighborhoods.
1-3 days + inspection
Physical install, ISD inspection, Eversource interconnection.
Total timeline: Most Boston solar installations take 6-10 weeks from signed contract to system activation. Historic district properties should plan for 10-16 weeks. Section 48E deadline note: If you want a lease/PPA with the commercial ITC, work backward from July 4, 2026 -- sign your agreement by May 2026 at the latest. NuWatt handles all permitting, utility coordination, and inspections.
Boston is Eversource territory -- and Eversource pays the highest ConnectedSolutions rates in Massachusetts. Adding a battery to your solar system unlocks a third income stream on top of SMART and net metering.
Summer (Jun-Sep)
$275/kW
10 kW battery = $2,750/yr
Winter (Dec-Mar)
$50/kW
10 kW battery = $500/yr
Annual CS Revenue
$3,250/yr
10 kW battery in Eversource territory
ConnectedSolutions stacks with the SMART battery adder ($0.04/kWh) for a combined value that makes battery storage profitable from year one.
Net Metering Savings
11 kW system at Eversource $0.2836/kWh (1:1 retail credit)
SMART 3.0 Income
$0.03/kWh x 13,200 kWh for 20 years
ConnectedSolutions Revenue
10 kW battery (e.g., Tesla Powerwall 3) enrolled in Eversource CS
Property Tax Savings
20-year exemption at Boston's 10.88 mill rate
Total Annual Value (Year 1)
Solar savings + SMART + ConnectedSolutions + tax benefits
Tesla Powerwall 2 / Powerwall 3
Enphase IQ Battery 5P / 10T
SolarEdge Home Battery 400V
Generac PWRcell
sonnen ecoLinx / eco
LG RESU Prime
How does Boston compare to neighboring cities on solar cost, utility rate, and payback?
| City | Avg $/W | Utility | Rate $/kWh | Payback | Notes |
|---|---|---|---|---|---|
| Boston | $3.16 | Eversource | $0.2836 | 7.6 yrs | Urban premium, historic districts |
| Cambridge | $3.33 | Eversource | $0.2836 | 7.8 yrs | Dense, academic, similar to Boston |
| Somerville | $3.20 | Eversource | $0.2836 | 7.7 yrs | Dense, triple-deckers, fast permits |
| Brookline | $3.25 | Eversource | $0.2836 | 7.7 yrs | Historic homes, some landmark zones |
| Quincy | $3.10 | Eversource | $0.2836 | 7.5 yrs | More roof space, lower labor costs |
| Worcester | $3.10 | National Grid | $0.32 | 6.8 yrs | Higher rate = faster payback |
Explore the complete library of Massachusetts solar guides, incentive programs, and local energy resources.
MA Solar Guide 2026
Complete guide to going solar in Massachusetts in 2026.
Solar Panel Cost in MA
Statewide cost breakdown: $2.80–$3.50/W by city and utility.
SMART Program Guide
$0.03/kWh for 20 years. How to enroll and maximize income.
Net Metering in MA
1:1 retail credit. Rules, caps, and how to lock in your rate.
Mass Save Heat Pump Rebates
Up to $10,000 back on heat pumps through Mass Save.
ConnectedSolutions Battery
Earn $275/kW summer demand response with Eversource.
Income-Eligible Programs
Free or deeply discounted upgrades for income-qualified homeowners.
Solar Financing Options
Cash, loan, and PPA compared for MA homeowners.
Solar panels in Boston cost an average of $3.16 per watt installed in March 2026. For a typical 11kW system, that is approximately $34,760 before state incentives. After the $1,000 Massachusetts state tax credit, SMART program enrollment, and net metering savings, the effective cost is significantly lower over time. There is no federal tax credit for homeowners in 2026 (Section 25D expired December 31, 2025).
Not a federal one. The 30% Section 25D residential ITC expired December 31, 2025. However, Massachusetts offers a 15% state tax credit (max $1,000), and there are 6 other active programs: SMART 3.0, 1:1 net metering, ConnectedSolutions battery revenue, 20-year property tax exemption, 6.25% sales tax exemption, and Section 48E lease/PPA (through July 4, 2026). These 7 programs combined can deliver a 7.6-year payback in Boston.
Section 48E is the commercial/third-party solar investment tax credit that is still available for projects beginning construction before July 4, 2026. When you lease solar panels or sign a PPA, the financing company (not you) claims the 30%+ ITC and passes the savings to you as a lower monthly rate. This means you can get solar with $0 upfront and a rate lower than your Eversource bill. It is not your tax credit -- it is the finance company's -- but you benefit from it.
It depends on the historic district. In Back Bay and Beacon Hill, the Boston Landmarks Commission (BLC) must approve exterior modifications. Panels are typically allowed on rear-facing or flat roofs that are not visible from the public way. All-black panels with low-profile mounts have higher approval rates. The review adds 4-8 weeks to your timeline but is not a dealbreaker. See our full Boston historic district solar guide for BLC application tips.
Absolutely. Triple-deckers in Dorchester, Mattapan, and Roxbury are some of the best candidates for solar in Boston. Their large flat roofs can accommodate 8-13kW systems, and the high energy usage across three units means faster payback. With Eversource rates at $0.2836/kWh and SMART incentives, payback is typically 6-8 years. Environmental justice communities may qualify for the $0.06/kWh SMART low-income rate, nearly doubling the program income.
Boston requires an Inspectional Services Department (ISD) permit for solar installations. The standard permit takes 1-2 weeks. If your property is in a historic district (Back Bay, Beacon Hill, parts of the South End, Mission Hill), you also need Boston Landmarks Commission approval, which adds 4-8 weeks. Your installer handles all permitting. Total timeline from contract to activation: 6-10 weeks (standard) or 10-16 weeks (historic districts).
All of Boston is served by Eversource Energy, which has the highest retail rates in Massachusetts at $0.2836/kWh. Eversource offers 100% retail-rate net metering for systems up to 25kW AC and participates in both the SMART program and ConnectedSolutions battery demand response. Eversource pays the highest ConnectedSolutions rates: $275/kW (summer) + $50/kW (winter).
Yes, but you need condo association approval for installations on shared roofs. Some newer condo buildings in the Seaport and South Boston waterfront are solar-ready with pre-wired infrastructure. For individual unit owners, community solar is an alternative that requires no rooftop installation -- you subscribe to a solar farm and receive bill credits. Section 48E PPA agreements can also work for condo associations seeking solar with no upfront cost.
Solar in Boston has one of the fastest payback periods in the country at approximately 7.6 years for a cash purchase. This is driven by Eversource's high retail rates ($0.2836/kWh), SMART 3.0 incentives ($0.03/kWh for 20 years, or $0.06/kWh for low-income), full retail net metering, and ConnectedSolutions battery revenue. Over 25 years, a typical 11kW system saves approximately $154,000. With a Section 48E lease/PPA, savings start from month one with no upfront cost.
In most cases, yes. Boston is Eversource territory, and Eversource pays the highest ConnectedSolutions battery rates in Massachusetts: $275/kW in summer plus $50/kW in winter. A 10kW battery (like Tesla Powerwall 3) earns approximately $3,250/year in ConnectedSolutions revenue alone. Add the SMART battery adder ($0.04/kWh) and you have a battery that pays for itself in 3-4 years while providing backup power during outages.
Many Boston homes -- especially pre-1980 triple-deckers, Victorian homes, and row houses -- have 100-amp panels that need upgrading for solar. A 200-amp upgrade costs $1,500-$4,000 in Boston. Newer construction (post-2000) typically already has 200-amp panels. If you are also adding an ADU, EV charger, or heat pump, combining the upgrade with your solar installation saves $500-$1,500 in shared permitting and labor costs.
Section 48E allows third-party solar companies to claim a 30% (or higher) investment tax credit on solar systems they own and lease to you. This credit was extended through projects that begin construction before July 4, 2026. After that date, this option disappears. If you are considering a lease or PPA to avoid the upfront cost of solar ($34,760 for a typical Boston system), you need to have your agreement signed and construction started before July 4, 2026.
We will assess your specific roof, neighborhood, and Eversource rate to show you exactly what solar costs and saves for your Boston home.
Section 48E lease/PPA deadline: Construction must begin by July 4, 2026. Start now to keep this option open.
All 7 active programs that replace the federal tax credit. Complete post-ITC incentive guide.
Read more DeadlineHow to get federal-level savings through a lease or PPA. Deadline: July 4, 2026.
Read more NewStep-by-step: how to enroll, timeline, cap status, and maximizing your SMART rate.
Read moreComplete SMART program analysis: rates, adders, cap status, commercial tiers.
Read moreEarn $225-$3,250/yr from your battery through Eversource demand response.
Read moreCompare every financing path in the post-ITC landscape. Which is best for you?
Read more20-year property tax exemption, 6.25% sales tax exemption, and $1,000 state credit.
Read moreCompare utility rates, net metering, and ConnectedSolutions payouts across MA utilities.
Read moreNavigate BLC review, local historic commissions, and approval strategies.
Read moreStatewide costs, incentives, and payback for all Massachusetts homeowners.
Read moreSolar without panels on your roof. Bill credits, enrollment, and what to watch for.
Read moreDo you need a panel upgrade? Cost, timeline, and SPAN smart panel alternative.
Read moreHonest pricing data, no sugar-coating. What solar actually costs after the ITC expired.
Read moreHow to choose: SMART expertise, ConnectedSolutions, historic district navigation, triple-decker experience.
Read more7 criteria every homeowner should check before signing a solar contract in Massachusetts.
Read moreSpot predatory tactics, inflated quotes, and shady financing. Protect yourself.
Read moreGoing beyond solar? Heat pump costs, Mass Save rebates, and 0% financing.
Read morePricing: EnergySage Solar Marketplace (January-March 2026), NuWatt Energy Boston installations.
Utility rates: Eversource R-1/R-2 tariff schedule, effective January 2026.
Section 48E: IRS Notice 2024-48, OBBBA (signed July 4, 2025) -- projects beginning construction before July 4, 2026.
SMART 3.0: MassDOER PY2026 program guidelines, effective January 2026.
ConnectedSolutions: Eversource 2026 demand response program tariff.
Permitting: Boston ISD solar permit requirements, Boston Landmarks Commission guidelines.
Property tax: Boston Assessing Department, FY2026 residential tax rate (10.88 mills).
Neighborhood data: NuWatt installation records and Boston property assessment data.