2026 · No Federal Tax Credit · NREL + EIA Data
Solar Panels in Massachusetts: Cost, Payback & ROI (2026)
Is solar still worth it in Massachusetts after the 30% federal tax credit expired? These pre-computed estimates use NREL PVWatts production data and current 27.2¢/kWh Massachusetts electricity rates for a typical home using 900 kWh/month.
Section 25D (30% federal solar tax credit) expired December 31, 2025
All numbers below reflect 2026 math with no federal residential credit. State incentives, where applicable, are noted in the section below.
Massachusetts Solar at a Glance
Based on a 900 kWh/month home ($245/mo electric bill at 27.2¢/kWh), 100% offset, no state rebate applied.
9.0 kW
For 900 kWh/month home
$26,550
At $2.95/W (LBNL 2024 avg)
8.4 years
Without state rebate
$2,938
Estimated annual savings
$93,942
Cumulative before rebate
$67,392
Savings minus system cost
27.2¢/kWh
very high vs. 16.0¢ U.S. avg · EIA 2025
1,200 kWh/kW/yr
limited · 3.7 peak sun hrs/day · NREL PVWatts
Is Solar Worth It in Massachusetts in 2026?
Massachusetts pays 27.2¢/kWh on average — among the highest in the U.S. — which makes solar financially attractive despite the state's relatively modest solar resource. The state's SMART program (Solar Massachusetts Renewable Target) provides a fixed incentive per kWh exported for 10 years, adding a stable revenue stream on top of net metering savings. Program capacity fills quickly; check if your utility block is still open.
For a typical Massachusetts home consuming 900 kWh per month, our calculation shows a 9.0 kW system needed for 100% offset. At the current national average installed cost of $2.95/W (LBNL Tracking the Sun 2024), that's $26,550 gross before any state rebates. Year-one savings of $2,938 grow each year as electricity rates escalate — the model assumes 2.5%/year (EIA AEO 2024).
The 8.4 years payback period is solid — at or below the national average of 8–12 years. Over 25 years — the standard warranty period for most premium panels — a Massachusetts homeowner following this profile would save an estimated $93,942 total, for a net benefit of $67,392 after recovering the system cost.
Year-by-Year Savings Snapshot: First 10 Years
Based on 9.0 kW system, 0.5%/yr degradation, 2.5%/yr rate escalation, no state rebate.
| Year | Production (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| Year 1 | 10,800 | $2,938 | $2,938 |
| Year 2 | 10,746 | $2,996 | $5,934 |
| Year 3 | 10,692 | $3,056 | $8,989 |
| Year 4 | 10,639 | $3,116 | $12,105 |
| Year 5 | 10,586 | $3,178 | $15,284 |
| Year 6 | 10,533 | $3,241 | $18,525 |
| Year 7 | 10,480 | $3,306 | $21,831 |
| Year 8 | 10,428 | $3,371 | $25,202 |
| Year 9✓ Paid off | 10,375 | $3,438 | $28,641 |
| Year 10 | 10,324 | $3,507 | $32,148 |
System cost to recover: $26,550. Table shows savings without state rebate applied. Use the interactive calculator to enter your actual bill and any rebate.
Solar Incentives in Massachusetts (2026)
The SMART program is one of the most structured long-term incentive designs in the country, paying a declining block incentive per kWh that gets locked in for the 10-year contract period.
- SMART Program (fixed ¢/kWh incentive, 10-year contracts)
- Sales tax exemption on solar systems
- Property tax exemption on added home value (3 years for municipalities)
- Mass Save rebates for home energy upgrades (paired with solar)
Incentive programs change frequently. Verify current offerings at dsireusa.org or directly with your utility before making any purchasing decision.
How We Calculate Massachusetts Solar ROI
These estimates use the same methodology as our interactive solar ROI calculator, applied to Massachusetts-specific data:
System cost
$2.95/W installed
LBNL Tracking the Sun 2024
Solar production
1,200 kWh/kW/yr
NREL PVWatts v8
Electricity rate
27.2¢/kWh
EIA Residential Rates 2025
Rate escalation
2.5%/year
EIA Annual Energy Outlook 2024
Panel degradation
0.5%/year
NREL (Jordan & Kurtz, median)
System lifetime
25 years
Standard warranty period
No Section 25D (federal residential solar credit) is included — it expired December 31, 2025. State incentives are not reflected in these pre-computed figures; use the interactive calculator to enter specific rebate amounts.
Calculate With Your Actual Numbers
The figures above use statewide averages. Enter your actual monthly bill, any Massachusetts rebate amounts, and your offset target in our interactive calculator for a personalized estimate.
Frequently Asked Questions — Solar in Massachusetts
Compare Other States
Estimates are based on NREL PVWatts v8 production data, EIA 2025 electricity rates, and LBNL 2024 installed cost benchmarks. Actual savings vary by roof pitch, shading, utility rate structure, and local permit costs. This is not financial advice. Consult a licensed solar installer before making any purchasing decision.