Solar Panel Cost in Massachusetts (2026)
Installed solar in Massachusetts runs about $3.16 per watt — roughly 22% above the national average of $2.58/W. With the federal residential tax credit (25D) gone as of 2026, payback here rests on a $0.29/kWh power price and 4.3 daily peak sun hours.
Worked example: a typical $150/month home in Massachusetts
A $150/month electric bill in Massachusetts works out to about 6,207 kWh a year. Sizing a cash-purchase system to cover 100% of that:
System size
5.2 kW
Panels
13
Annual offset
105%
Gross cost
$18,932
Federal credit (25D)
$0
Expired 12/31/2025 — $0
State incentive
$947
Net cost
$17,985
Payback
8.5 yr
25-year savings
$50,890
Last updated June 30, 2026
Massachusetts solar numbers
- Installed price
- $3.16 / watt
- Electricity price
- $0.29 / kWh
- Peak sun hours
- 4.3 hrs/day
- State incentive
- 5%
- Net-metering value
- 100% of retail
Local context: Expensive electricity and the SMART incentive keep Massachusetts among the top solar-value states.
Estimate your own Massachusetts system
Adjust the bill, ownership, and battery options below — it's pre-set to Massachusetts's pricing and sun hours.
Estimated system cost
$21,969–$28,535
7.2 kW18 panels
Low $22kMost likely ~$25,252High $29k
Federal tax credit
— expired Dec 2025, we won't pretend otherwise
$0
State & utility incentives
–$1,263
Est. annual savings
$2,622
Payback period
~8.2 yr
Net cost
$21k–$27k
25-year net savings
+$71,376
iA ballpark estimate for planning — not a final quote.
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