Massachusetts vs Tennessee Solar Comparison
Tennessee gets more sun (4.3 hrs/day) while Massachusetts has the faster payback (6 years).Massachusetts offers higher 20-year savings at $54,800.
Massachusetts
3.8 hrs
6yr payback
$54,800
20yr savings
Tennessee
4.3 hrs
11.5yr payback
$26,400
20yr savings
Side-by-Side Comparison
| Metric | Massachusetts | Tennessee |
|---|---|---|
| Peak Sun Hours | 3.8 hrs | 4.3 hrs |
| Cost per Watt | $3.40 | $3.00 |
| 6kW System Cost | $20,400 | $18,000 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | 15% | None |
| State Rebate | $1,000 | None |
| Net Metering | Full Net Metering | No Net Metering |
| Electricity Rate | 28.58¢/kWh | 12.91¢/kWh |
| Payback Period | 6 years | 11.5 years |
| 20-Year Savings | $54,800 | $26,400 |
Verdict
Massachusetts is the better state for solar ROI with $54,800 in 20-year savings and a 6-year payback period. Tennessee has more sun exposure at 4.3 hrs/day, making it ideal for maximum energy production. Both states qualify for the 30% federal solar tax credit.
Frequently Asked Questions
Is solar better in Massachusetts or Tennessee?
Tennessee gets more sun (4.3 peak hours/day vs 3.8). Massachusetts has a faster payback (6 years) and Massachusetts offers higher 20-year savings ($54,800).
How do solar costs compare between Massachusetts and Tennessee?
A 6kW system costs $20,400 in Massachusetts vs $18,000 in Tennessee before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA