Solar Panels in Massachusetts: 2026 Costs, the SMART Program, and What's Left Without the Federal Credit

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Last updated: 2026-08-28

The bottom line first: Massachusetts homeowners going solar in 2026 are working with a different equation than the one that made solar a near-automatic decision a few years ago. The federal 30% tax credit (Section 25D) is gone for anyone installing a cash- or loan-financed system this year — that part is not unique to Massachusetts. What is unique to Massachusetts is that the state has stacked its own incentives on top of the federal credit for over a decade, and those state-level pieces are all still standing: a 15% state income tax credit, a 100% sales tax exemption on the equipment, a 20-year property tax exemption on the added home value, and the SMART program, which pays a per-kilowatt-hour production incentive most other states don't offer. Combined with electricity rates that are consistently among the highest in the continental U.S., that's a stronger incentive floor than most states have left to stand on now that the federal credit is out of the picture.

What Changed for 2026, and What Didn't

Every state solar guide has to say this now, so it's worth being precise about it. The federal Section 25D residential clean energy credit — the 30% credit that anchored solar payback math nationwide — ended for systems placed in service after December 31, 2025. If you're buying or financing a system with a loan in 2026, that 30% isn't part of your math anymore. If you already had a system installed and interconnected before the cutoff, your existing credit and any carryforward balance are untouched. The one exception that still exists is leased and power-purchase-agreement (PPA) systems, where the leasing company — not you — can claim a separate commercial credit under Section 48E, but only for projects that began construction by July 4, 2026, and that credit is phasing out through 2027. If an installer or lease pitch tells you that you personally still get "the 30% credit" on a cash or loan purchase in 2026, that's outdated information — see our full breakdown of what's actually left after the federal deadline for the complete picture.

What didn't change is everything Massachusetts runs at the state level, because none of it depends on the federal credit still existing.

The Massachusetts State Tax Credit

Massachusetts has offered its own residential renewable energy income tax credit for years, separate from and unaffected by the federal credit's expiration. It's worth 15% of your system cost, capped at $1,000, and you claim it on Massachusetts Schedule EC when you file your state return for the year the system was installed. It's a modest credit compared to what the federal 30% used to provide, but it's a straightforward, no-strings dollar-for-dollar reduction in what you owe the state, and it stacks with everything else below.

The Sales Tax and Property Tax Exemptions

Two incentives that homeowners routinely miss because they're not check-writing rebates:

Sales tax exemption. Solar energy equipment purchased for a Massachusetts home is exempt from the state's 6.25% sales tax. On a system in the $20,000-$30,000 range, that's roughly $1,250-$1,875 you simply don't pay at the point of purchase — most reputable installers already build this exemption into their quoted price, so confirm it's reflected rather than assuming you'll claim it separately.

Property tax exemption. Adding solar panels increases your home's assessed value, which would normally mean a higher property tax bill. Massachusetts exempts that added value from property tax assessment for 20 years from the date of installation. You get the resale value bump without the annual tax hit — a meaningful, easy-to-overlook piece of the long-term math, especially for homeowners planning to stay put for years.

The SMART Program: Getting Paid for What You Produce

This is the piece that sets Massachusetts apart from most of the country. SMART (Solar Massachusetts Renewable Target) is a state-created, utility-administered incentive that pays you a fixed rate per kilowatt-hour your system actually generates — not just what you export to the grid, but total production — on top of whatever you're already saving through net metering.

A few things to understand before assuming a specific number:

• It's declining-block, not fixed statewide. SMART pays out in blocks tied to how much solar capacity has already enrolled in your utility's service territory. Earlier blocks pay more; as capacity fills up, the rate for new applicants steps down. What your neighbor locked in two years ago is not what you'll get signing up today.
• It's administered through your utility, primarily Eversource, National Grid, or Unitil depending on where you live, and the current block and rate need to be confirmed directly with your utility or installer at the time you apply, not assumed from an old quote.
• It runs over a contract term, generally paid out over roughly a decade, rather than delivered as a one-time check — so it functions more like a long-term revenue stream layered on top of your electricity savings than an upfront rebate.

Because SMART rates move with enrollment and vary by utility, this is exactly the kind of number you want confirmed in writing as part of a real quote rather than estimated from a blog post. Compare quotes from installers who serve your specific Massachusetts utility territory through EnergySage — the form asks for your utility, which matters more in Massachusetts than in most states because it determines both your SMART block and your net metering credit structure.

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Net Metering in Massachusetts

Massachusetts requires net metering, and for most residential rooftop systems, exported power is credited close to the full retail rate, subject to program caps and the specific credit class your system falls into. The details — exact credit rate, whether it's assigned per-kWh or as a bill credit, and how it interacts with SMART payments on the same system — vary enough by utility and system size that a general number would be more misleading than helpful here. What matters for your decision is asking your installer to show you, in writing, the exact net metering credit rate that applies to your utility and system size before you sign anything, the same way you'd confirm a SMART block rate.

What Solar Actually Costs in Massachusetts

Installers serving the Massachusetts market generally report pricing modestly above the national average, largely reflecting the state's higher labor costs and a permitting and inspection process that varies by town. A typical system sized for an average single-family home lands most homeowners in a similar range to what's quoted nationally before incentives, with the state tax credit, sales tax exemption, property tax exemption, and SMART payments together offsetting a real share of that upfront number over the life of the system — even without the federal credit in the mix.

Two things specific to Massachusetts worth asking your installer about directly:

Roof age and condition. Massachusetts has a large stock of older homes, and re-roofing under an installed solar array is far more expensive than doing it first. If your roof is more than 10-12 years old, get a roofer's assessment before signing a solar contract, not after.

Snow load and panel angle. New England winters mean snow accumulation is a real production factor, not a footnote. Ask your installer how they've accounted for snow shedding in your specific roof pitch and panel placement, and what production numbers assume for the winter months.

Why Backup Power Matters More Here Than the Sales Pitch Suggests

Massachusetts doesn't have Texas's ERCOT-style structural grid risk, but it isn't immune to outages either — nor'easters and winter storms regularly knock out power across Eversource and National Grid territory, sometimes for days, and a standard grid-tied solar system does nothing during those outages. Grid-tied inverters are required to shut off when utility power goes down, specifically to protect line workers, so panels on your roof don't help you during exactly the kind of storm-driven outage Massachusetts sees most winters.

For homeowners who want backup coverage without waiting on a full home battery installation — or who want it as a bridge while their solar system is still in the permitting and install pipeline — a portable power station is the faster, lower-cost option. The Jackery Explorer 2000 Plus covers a refrigerator, WiFi, lighting, and phone charging through a multi-day outage and is sized appropriately for most households without the cost or install timeline of a whole-home battery. It also accepts solar panel input directly, so once your rooftop system is live, it can recharge from your own panels during daylight hours of an outage instead of running down to empty.

Affiliate Disclosure: This article may contain affiliate links. If you make a purchase through these links, we may earn a small commission at no extra cost to you. We only recommend products we genuinely believe in. This helps support our work and allows us to continue providing free content.

The Bottom Line for Massachusetts Homeowners

Massachusetts is one of the stronger states to go solar in during 2026 precisely because so little of its incentive stack depends on the federal credit that just expired. The 15% state tax credit, the sales tax exemption, the 20-year property tax exemption, and the SMART production incentive are all still fully in place, and they're stacked on top of some of the highest electricity rates in the country — which is the single biggest factor in how fast any solar system pays for itself. The number that actually matters is your specific SMART block rate and net metering credit, both of which depend on your utility and need to be confirmed in a real quote, not estimated from a statewide average.

Compare Massachusetts solar quotes through EnergySage to see real pricing and incentive numbers for your specific utility territory before you commit to anything.

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Want to go deeper on the pieces that matter most for Massachusetts homeowners?

• Is Solar Still Worth It in 2026 Now That the Federal Tax Credit Is Gone?
• Net Metering by State: Which Markets Still Pay Retail Rate
• The 72-Hour Home Outage Sizing Guide

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