Solar panels in Boston cost $16,400–$24,100 for a typical 8 kW system in 2026. The 30% federal residential tax credit (Section 25D) expired December 31, 2025 and is not available for new purchases. With Eversource Energy's current rate of $0.231/kWh, most Boston homeowners see a payback period of 10–14 years.
Below: full cost breakdown, payback analysis, and financing options for Boston, MA.
$16,400–$24,100
Typical System Cost
Before incentives
10–14 years
Payback Period
Without federal ITC
$1,590
Annual Savings
At $0.231/kWh
Federal ITC expired: The 30% Section 25D residential credit ended December 31, 2025. Homeowners who purchased and installed systems by that date can still claim it on their 2025 tax return. 2026 purchases do not qualify. Who is grandfathered? →
| Item | Amount |
|---|---|
| Gross system cost (8 kW) | $16,400–$24,100 |
| Federal 30% ITC (Section 25D) | $0 |
| Massachusetts Sales Tax Exemption | Savings vary |
| Massachusetts SMART Program | Varies |
| Effective net cost (2026) | $16,400–$24,100 |
* Cost estimates are for a typical 8 kW residential system in Boston. Actual quotes vary by roof type, shading, equipment brand, and installer. Get multiple quotes to compare.
Without the 30% federal ITC, the payback period for Boston homeowners purchasing in 2026 is approximately 10–14 years — roughly 40% longer than pre-2026 estimates that assumed the credit. At Eversource Energy's current rate of $0.231/kWh, a 8 kW system generates approximately $1,590 in annual savings.
$20,250
System cost (mid-range)
$1,590
Annual savings
~12 years
Payback (no ITC)
20-Year Ownership Outlook
After the payback period, the remaining system life is essentially free electricity. Over 20 years, a 8 kW system in Boston generates approximately $31,800 in cumulative savings — a net gain of roughly $11,550 after recovering the system cost. These figures assume flat utility rates; Eversource Energy rates have historically increased 3–5% annually, which would improve the long-term math.
Cash purchase
Pros
Lowest total cost, full ownership, maximum long-term savings
Cons
Requires full upfront payment
Best for
Homeowners with capital who want maximum ROI
Solar loan
Pros
$0 down, you own the system, eligible for any state incentives
Cons
Interest adds to total cost; loan term affects monthly payment
Best for
Homeowners who want ownership without upfront cost
Solar lease
Pros
$0 down, no maintenance responsibility, immediate bill reduction
Cons
You don't own the system; installer may retain SREC income (check contract); complicates home sale
Best for
Homeowners who want simplicity and no upfront cost
Power Purchase Agreement (PPA)
Pros
$0 down, pay per kWh generated (usually below utility rate), installer handles maintenance
Cons
Rate may escalate annually; you don't own the system
Best for
Homeowners who want predictable low rates without ownership
Solar leases and PPAs are widely available in Boston through Eversource-approved installers. Massachusetts' SMART program payments are assignable to third-party owners in lease/PPA arrangements — confirm SMART eligibility with your installer before signing.
The only way to know your actual cost is to get quotes from local installers. SunLynk connects you with up to 3 pre-vetted Boston solar companies — free, no pressure.
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See national pricing data: How Much Do Solar Panels Cost in 2026? → · All Solar Cost Guides →