Hawaii vs Tennessee Solar Comparison
Hawaii gets more sun (5.5 hrs/day) while Hawaii has the faster payback (4.8 years).Hawaii offers higher 20-year savings at $72,400.
Hawaii
5.5 hrs
4.8yr payback
$72,400
20yr savings
Tennessee
4.3 hrs
11.5yr payback
$26,400
20yr savings
Side-by-Side Comparison
| Metric | Hawaii | Tennessee |
|---|---|---|
| Peak Sun Hours | 5.5 hrs | 4.3 hrs |
| Cost per Watt | $3.50 | $3.00 |
| 6kW System Cost | $21,000 | $18,000 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | 35% | None |
| State Rebate | $5,000 | None |
| Net Metering | Full Net Metering | No Net Metering |
| Electricity Rate | 43.18¢/kWh | 12.91¢/kWh |
| Payback Period | 4.8 years | 11.5 years |
| 20-Year Savings | $72,400 | $26,400 |
Verdict
Hawaii is the better state for solar ROI with $72,400 in 20-year savings and a 4.8-year payback period. Hawaii has more sun exposure at 5.5 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 Hawaii or Tennessee?
Hawaii gets more sun (5.5 peak hours/day vs 4.3). Hawaii has a faster payback (4.8 years) and Hawaii offers higher 20-year savings ($72,400).
How do solar costs compare between Hawaii and Tennessee?
A 6kW system costs $21,000 in Hawaii 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