Solar Panels in Massachusetts: 2026 Cost Guide, Incentives & Savings

Massachusetts Solar Costs at a Glance

Installed solar in Massachusetts costs $3.00–$3.50 per watt in 2026, putting a typical 8kW system at $24,000–$28,000. MA runs above the national average on installed cost — higher labor costs, permitting fees, and a concentrated installer market around Greater Boston keep prices elevated.

What makes Massachusetts exceptional is the other side of the equation: MA has the 2nd highest electricity rates in the continental US at ~$0.28/kWh, roughly 65% above the national average. Every kilowatt-hour your panels produce is worth significantly more than in most states. Add SMART performance payments, the state income tax credit, no sales tax on equipment, and a 20-year property tax exemption — and Massachusetts homeowners have one of the strongest solar ROI cases in the country, even without the federal ITC.

The federal Investment Tax Credit (ITC) expired December 31, 2025. Massachusetts’s layered state-level incentives more than compensate. Here’s the complete picture for 2026.

Massachusetts Solar Cost by System Size (2026)

Here’s the full cost breakdown for the most common residential system sizes in MA, including estimated SMART income and payback:

System Size	Installed Cost (MA)	Annual SMART Income*	Monthly Bill Savings**	Payback Period
6 kW	$18,000 – $21,000	$207 – $233/yr	$130 – $165/mo	6–8 years
8 kW	$24,000 – $28,000	$276 – $312/yr	$170 – $215/mo	6–8 years
10 kW	$30,000 – $35,000	$345 – $390/yr	$210 – $265/mo	7–9 years
12 kW	$36,000 – $42,000	$414 – $468/yr	$250 – $315/mo	7–9 years

* SMART income at $0.03/kWh over 10-year term based on MA SMART 3.0 base rate for residential systems (8,000 hrs). Actual rate depends on enrollment block and any applicable adders (battery storage: +$0.04/kWh). ** Monthly savings at MA’s average ~$0.28/kWh with near-retail net metering. Payback excludes federal ITC (expired Dec 31, 2025).

Not sure what size you need? Our MA solar sizing calculator gives you a specific kW recommendation based on your monthly bill and Massachusetts zip code.

Massachusetts Solar Incentives in 2026

Massachusetts has one of the strongest state-level solar incentive stacks in the country. Here’s what’s active in 2026:

1. SMART: The Solar Massachusetts Renewable Target Program

Massachusetts’s primary solar incentive is the SMART program (Solar Massachusetts Renewable Target), administered by the Massachusetts Department of Energy Resources (DOER). Now in its third iteration (SMART 3.0, launched October 2025), the program pays residential customers a flat $0.03/kWh for the electricity their system generates — monthly, for 10 years.

For a typical 8kW MA system generating 9,200–9,600 kWh annually, that’s $276–$288/year in SMART income on top of your bill savings. Payments are made by your utility (Eversource, National Grid, or Unitil) on a monthly basis. Your installer handles the application through the SMART program administrator (CLEAResult at masmartsolar.com).

SMART 3.0 adders can significantly boost your rate. Systems with battery storage receive an additional +$0.04/kWh — bringing the effective SMART rate to $0.07/kWh and annual income for an 8kW system to roughly $644–$672/year. Low-income households (≤80% AMI) receive $0.06/kWh (double the base rate). Additional adders exist for brownfield sites, canopies, and community solar projects.

System Size	Annual Generation (MA avg)	SMART Base $0.03/kWh	SMART + Battery $0.07/kWh	10-Year Total
6 kW	6,900–7,200 kWh	$207 – $216/yr	$483 – $504/yr	$2,070 – $5,040
8 kW	9,200–9,600 kWh	$276 – $288/yr	$644 – $672/yr	$2,760 – $6,720
10 kW	11,500–12,000 kWh	$345 – $360/yr	$805 – $840/yr	$3,450 – $8,400

SMART 3.0 base rate shown; actual rate depends on enrollment block. Battery storage adder (+$0.04/kWh) requires qualifying battery system. Verify current rates at masmartsolar.com before signing an installation contract.

2. Massachusetts State Income Tax Credit

Massachusetts offers a personal income tax credit equal to 15% of your solar installation cost, up to $1,000. This applies to purchased solar systems at your primary Massachusetts residence. The credit stacks with SMART payments, net metering savings, and all other state incentives — it’s additive, not a replacement.

On a $26,000 system, the credit is worth $1,000 (capped). It reduces your effective upfront cost directly — file Schedule EC with your MA state tax return to claim it. Consult a tax professional for your specific situation.

3. Net Metering in Massachusetts

Massachusetts offers near-retail-rate net metering for residential solar customers. When your panels produce more electricity than you use, the excess is credited to your account at nearly the full retail rate — approximately $0.28/kWh in 2026. Unused credits carry forward month-to-month. Annual reconciliation happens at the avoided-cost rate, but monthly credits are at retail value.

This is a significant advantage over states that have moved to avoided-cost or wholesale-rate net metering. In MA, excess solar is worth nearly the same as grid power you buy — maximizing the value of every kWh your system produces, including generation that occurs during peak summer months when you’re away from home.

• Eversource (most of MA): Near-retail net metering. Covers Boston metro, Worcester, Springfield, and most of the state.
• National Grid (Southeastern MA, Cape Cod, Martha’s Vineyard): Near-retail net metering under the same DOER-administered framework.
• Unitil (Fitchburg, Worcester County): Near-retail net metering. Smaller service area but same program rules.

4. Massachusetts Sales Tax Exemption

Solar energy systems are fully exempt from Massachusetts’ 6.25% sales tax. On a $26,000 system, that’s $1,625 saved at purchase — applied automatically at the time of sale. No application, no paperwork. If your installer doesn’t apply this exemption, ask them to.

5. Property Tax Exemption

Massachusetts law (MGL Chapter 59, Section 11) exempts solar energy systems from local property tax assessment for 20 years from installation. A solar installation typically adds $15,000–$25,000 to home value — without this exemption, MA homeowners at the state’s property tax rates (some towns exceed $20/$1,000 AV) would pay an additional $300–$500/year in property taxes. The 20-year exemption eliminates this cost entirely and is one of the longest property tax exemptions for solar in any state.

Note: The exemption must be claimed through your municipality’s assessor office. Most installers will flag this, but confirm with your town assessor after installation.

6. Federal ITC: What Changed in 2026

The federal Investment Tax Credit (ITC) — which had been 30% of system cost — expired December 31, 2025 for residential installations. In 2026, that credit is no longer available to new residential buyers.

This adds roughly $7,200–$8,400 to the effective cost of a typical MA system. It extends payback periods by approximately 2–3 years compared to 2025. However, Massachusetts’s extremely high electricity rates and layered state incentives mean the economics still work strongly — MA homeowners recover more per kWh than almost any other state.

Massachusetts Utility Rates: Eversource, National Grid & Unitil

Massachusetts has three investor-owned utilities serving residential customers. Your utility and their rates determine how much your panels save per kWh produced. All three utilities run rates that are among the highest in the continental US — which is why MA is such a strong solar market despite being a New England state with moderate sun hours.

Eversource (Most of Massachusetts — Boston, Worcester, Springfield)

Eversource serves the vast majority of Massachusetts, covering Greater Boston, the Metro West suburbs, Worcester, Springfield, and most of the state. Eversource residential rates run approximately $0.27–$0.31/kWh in 2026, driven by high distribution charges and consistently rising supply costs. In Eversource territory, an 8kW system in Boston or Worcester can expect:

• $2,484–$2,976/year in direct bill savings (assuming full offset at $0.27–$0.31/kWh avg)
• $276–$288/year in SMART income during years 1–10 (base rate)
• Effective payback: 6–8 years (no ITC)

National Grid (Southeastern MA, Cape Cod, Martha’s Vineyard)

National Grid serves the southeastern corner of Massachusetts — including Brockton, Plymouth, Cape Cod, New Bedford, Fall River, and the Islands. National Grid residential rates run approximately $0.26–$0.30/kWh in 2026, comparable to Eversource. Cape Cod and the South Shore have strong suburban solar markets with competitive installer pricing and good sun exposure near the coast. An 8kW system in National Grid territory typically pays back in 6–8 years.

Unitil (Fitchburg, Northern Worcester County)

Unitil serves a smaller territory in northern Worcester County, including Fitchburg and surrounding communities. Unitil residential rates run approximately $0.26–$0.29/kWh in 2026. The Unitil service area has good sun exposure and typically less shading than the Boston metro — rural rooftop potential is strong. An 8kW system in Unitil territory typically pays back in 7–9 years, slightly longer due to lower installer competition in the region.

Utility	Service Area	Rate (2026)	Peak Sun Hours	8kW Payback (est.)
Eversource	Boston, Worcester, Springfield, most of MA	$0.27–$0.31/kWh	4.1–4.4	6–8 years
National Grid	Cape Cod, South Shore, New Bedford, Brockton	$0.26–$0.30/kWh	4.2–4.5	6–8 years
Unitil	Fitchburg, North Worcester County	$0.26–$0.29/kWh	4.0–4.3	7–9 years

MA Solar ROI: The 25-Year Math

Let’s run the numbers for a typical MA homeowner: $200/month electric bill, 8kW system, Eversource territory (Greater Boston, ~$0.29/kWh average rate).

• System cost: $26,000 (8kW at $3.25/watt, MA average)
• State income tax credit: −$1,000 (15% cap)
• Sales tax savings: −$1,625 (6.25% exemption applied at purchase)
• Effective upfront cost: $23,375
• Year 1 electric bill savings: ~$2,784/year (offset 100% of $200/mo bill at $0.29/kWh avg)
• Year 1 SMART income: ~$282/year (9,400 kWh × $0.03/kWh)
• Total Year 1 benefit: $3,066
• Payback period: ~7 years (accounting for 4%/year rate escalation)
• Year 25 cumulative savings: ~$118,000 (after paying off system)

Massachusetts’s electricity rates are the key driver here — and they’ve been rising faster than the national average. MA utilities have increased rates roughly 5–6% per year over the past decade, nearly double the national average escalation rate. Every year rates climb, the value of your locked-in solar investment rises while grid costs continue to compound. At $0.28/kWh and climbing, MA homeowners who go solar are buying the next 25 years of electricity at 2026 prices. That’s a powerful hedge — and SMART guarantees a fixed income stream for 10 years regardless of rate volatility.

Run your specific numbers with our savings calculator — it factors in your exact zip code, electric bill, and utility to give you a personalized payback estimate.

Best Areas in Massachusetts for Solar

Here’s how Massachusetts’s major markets compare for solar in 2026:

Greater Boston Metro: Strongest ROI, Densest Market

The Boston metro — Cambridge, Somerville, Newton, Brookline, Arlington, Medford, Quincy, and the inner suburbs — is the most mature solar market in Massachusetts. Eversource rates are at the high end ($0.28–$0.31/kWh), the installer ecosystem is deep and competitive, and roof stock is generally good. The region averages 4.0–4.3 peak sun hours daily — respectable for New England. Condos and townhouses with shared roofs face HOA and legal complexity; single-family homes are ideal. Typical payback: 6–7 years for a well-oriented south-facing roof.

South Shore: Strong Sun, High Rates, Good Roof Stock

The South Shore — Hingham, Weymouth, Braintree, Plymouth, Duxbury, Marshfield — is National Grid territory with excellent sun exposure near the coast. This is one of MA’s strongest emerging solar markets: high rates, good suburban roof stock, growing installer competition, and less tree shade than the Boston metro. The coastal areas get better sun hours (4.3–4.5) than inland towns. Typical payback: 6–8 years.

Cape Cod & Islands: High Solar Penetration, Strong Incentives

Cape Cod, Martha’s Vineyard, and Nantucket are National Grid or municipal utility territory with some of the highest electricity rates in MA — Cape Cod customers have seen bills rise sharply in recent years. Solar adoption is strong here partly because off-island transmission costs drive rates high. Nantucket in particular has a unique rate structure with exceptionally high per-kWh costs — solar ROI is exceptional. Eversource serves the Upper Cape (Sandwich, Bourne). Typical payback: 5–7 years on Nantucket and outer Cape; 6–8 years on the mid-Cape.

Worcester & Central MA: Solid ROI, Growing Market

Worcester and central Massachusetts — including Shrewsbury, Westborough, Leominster, and the surrounding towns — is a mix of Eversource and Unitil territory with strong sun exposure and less urban tree shade than Boston. Worcester has seen significant solar adoption growth in recent years, and the installer market has matured. Single-family homes on larger lots are well-suited. Typical payback: 7–9 years in Unitil territory (Fitchburg/Leominster); 6–8 years in Eversource territory (Worcester proper).

Springfield & Western MA: Emerging Market, Strong Potential

Springfield and the Pioneer Valley — Northampton, Amherst, Holyoke, Chicopee — is Eversource territory with excellent sun exposure and a growing solar market. The Five College area (Amherst, Northampton, South Hadley) has strong community solar programs and progressive local energy policies. Western MA typically has less tree canopy and less urban shade than Boston — roof production is often above average for the state. Typical payback: 7–9 years.

When Solar Doesn’t Work in Massachusetts

Solar works well for most MA homeowners — but there are still situations where the numbers don’t stack up:

• Electric bill under $100/month. Low usage means limited savings. MA’s high rates help, but a very small bill produces a small system that doesn’t pencil out as strongly after installation costs.
• Heavy tree shading. Massachusetts’s wooded suburban landscape is a real constraint. Dense deciduous or evergreen canopy can cut production 30–50%. Have an installer do a full-year shade analysis — summer snapshots miss winter production losses when the sun is lower and trees are bare.
• Roof needs replacement within 10 years. Removing and reinstalling panels for a roofing job costs $2,000–$5,000. Do the roof first if shingles are on their last legs — or add the roof replacement to the project upfront.
• Condo or co-op with restricted roof access. Shared roofs require HOA or condo association approval, which can be a lengthy process. Community solar (a SMART-eligible option) may be a better fit if roof access is constrained.
• Planning to sell within 3–4 years. MA buyers respond well to solar, and the 20-year property tax exemption protects assessed value, but in a compressed timeline you may not recapture the full installation cost at resale.

Still evaluating? Our solar assessment tool walks through your specific situation and gives you a concrete go/no-go recommendation with payback math.

How Solirfy Helps Massachusetts Homeowners

Solirfy’s free calculators are built for homeowners who want real numbers, not a sales pitch. For MA homeowners:

• Solar Savings Calculator — Enter your monthly bill and MA zip code. Get a personalized monthly savings estimate, SMART income projection, and payback period based on your actual Eversource, National Grid, or Unitil rate.
• Solar Sizing Calculator — Find the right kW system for your household. No oversizing, no undersizing — the right number based on your usage and Massachusetts sun data.
• Solar Decision Assessment — Answer 5 questions about your bill, roof, and situation. Get a go/no-go recommendation with the math behind it.

All free. No salespeople will contact you unless you request it. With MA electricity rates at $0.28/kWh and rising, you deserve honest numbers before you commit to a $25,000+ investment.

FAQ: Solar Panels in Massachusetts

How much do solar panels cost in Massachusetts in 2026?

$3.00–$3.50 per watt fully installed, averaging around $3.25/watt. A typical 8kW system runs $24,000–$28,000 before incentives. The state income tax credit (15%, up to $1,000) saves up to $1,000 on your MA tax return. The sales tax exemption (6.25%) saves $1,500–$1,750 at purchase. The federal ITC expired December 31, 2025. Use our sizing calculator to estimate your specific system cost based on your MA zip code and electric bill.

What are the best solar incentives in Massachusetts in 2026?

MA’s strongest incentives: (1) SMART program via MA DOER — $0.03/kWh for 10 years ($276–$288/yr for a typical 8kW system); (2) State income tax credit — 15% of system cost, up to $1,000; (3) Near-retail net metering through Eversource, National Grid, and Unitil; (4) 6.25% sales tax exemption on all solar equipment; (5) 20-year property tax exemption on added home value from solar. The federal ITC (30%) expired at the end of 2025.

Is solar worth it in Massachusetts in 2026?

Yes — MA’s ~$0.28/kWh electricity rate is the strongest solar ROI driver in New England and the 2nd highest in the continental US. Every kWh your panels generate is worth 65% more than in an average-rate state. Even without the federal ITC, SMART income, state income tax credit, and complete tax exemptions produce 6–8 year payback periods for most MA homeowners paying $150+/month in electricity. Get your specific estimate here.

What is the SMART program for solar in Massachusetts?

SMART (Solar Massachusetts Renewable Target) is Massachusetts’ performance-based solar incentive program, administered by the MA Department of Energy Resources (DOER). SMART 3.0 (launched October 2025) pays residential customers a flat $0.03/kWh for 10 years for every kWh their system generates. Payments are made monthly by your utility (Eversource, National Grid, or Unitil). Battery storage systems receive an additional +$0.04/kWh adder, raising the effective rate to $0.07/kWh. Your installer handles enrollment through CLEAResult (masmartsolar.com). A typical 8kW system earns $276–$288/year through SMART at base rate — $644–$672/year with battery storage.

How much does solar save on electric bills in Massachusetts?

A properly sized 8–10kW system in MA offsets 80–100% of a typical household’s electricity use. At MA’s average ~$0.28/kWh, an 8kW system generating 9,200 kWh/year saves roughly $2,576/year in bill savings — one of the highest per-system savings rates in the country. Add $276–$288/year in SMART income during years 1–10 (or $644–$672/year with battery storage) for a total first-year benefit of $2,852–$2,864. Over 25 years with 4% annual rate increases, that compounds to $110,000–$130,000 in total savings. Run your exact numbers here.