Idaho vs Maryland Solar Comparison
Idaho gets more sun (4.7 hrs/day) while Maryland has the faster payback (8.5 years).Maryland offers higher 20-year savings at $36,400.
Idaho
4.7 hrs
12.5yr payback
$22,400
20yr savings
Maryland
4.3 hrs
8.5yr payback
$36,400
20yr savings
Side-by-Side Comparison
| Metric | Idaho | Maryland |
|---|---|---|
| Peak Sun Hours | 4.7 hrs | 4.3 hrs |
| Cost per Watt | $3.00 | $3.10 |
| 6kW System Cost | $18,000 | $18,600 |
| Federal Tax Credit | 30% | 30% |
| State Tax Credit | None | None |
| State Rebate | None | $1,000 |
| Net Metering | Full Net Metering | Full Net Metering |
| Electricity Rate | 11.15¢/kWh | 16.57¢/kWh |
| Payback Period | 12.5 years | 8.5 years |
| 20-Year Savings | $22,400 | $36,400 |
Verdict
Maryland is the better state for solar ROI with $36,400 in 20-year savings and a 8.5-year payback period. Idaho has more sun exposure at 4.7 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 Idaho or Maryland?
Idaho gets more sun (4.7 peak hours/day vs 4.3). Maryland has a faster payback (8.5 years) and Maryland offers higher 20-year savings ($36,400).
How do solar costs compare between Idaho and Maryland?
A 6kW system costs $18,000 in Idaho vs $18,600 in Maryland before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA