Maine vs Montana Solar Comparison
Montana gets more sun (4.5 hrs/day) while Maine has the faster payback (7.5 years).Maine offers higher 20-year savings at $40,200.
Maine
3.8 hrs
7.5yr payback
$40,200
20yr savings
Montana
4.5 hrs
11.5yr payback
$24,200
20yr savings
Side-by-Side Comparison
| Metric | Maine | Montana |
|---|---|---|
| Peak Sun Hours | 3.8 hrs | 4.5 hrs |
| Cost per Watt | $3.30 | $3.10 |
| 6kW System Cost | $19,800 | $18,600 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | None | None |
| State Rebate | None | None |
| Net Metering | Full Net Metering | Full Net Metering |
| Electricity Rate | 26.37¢/kWh | 12.81¢/kWh |
| Payback Period | 7.5 years | 11.5 years |
| 20-Year Savings | $40,200 | $24,200 |
Verdict
Maine is the better state for solar ROI with $40,200 in 20-year savings and a 7.5-year payback period. Montana has more sun exposure at 4.5 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 Maine or Montana?
Montana gets more sun (4.5 peak hours/day vs 3.8). Maine has a faster payback (7.5 years) and Maine offers higher 20-year savings ($40,200).
How do solar costs compare between Maine and Montana?
A 6kW system costs $19,800 in Maine vs $18,600 in Montana before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA