Louisiana vs Washington Solar Comparison
Louisiana gets more sun (4.8 hrs/day) while Louisiana has the faster payback (11 years).Louisiana offers higher 20-year savings at $27,800.
Louisiana
4.8 hrs
11yr payback
$27,800
20yr savings
Washington
3.5 hrs
12.5yr payback
$22,800
20yr savings
Side-by-Side Comparison
| Metric | Louisiana | Washington |
|---|---|---|
| Peak Sun Hours | 4.8 hrs | 3.5 hrs |
| Cost per Watt | $2.95 | $3.10 |
| 6kW System Cost | $17,700 | $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 | 12.52¢/kWh | 11.26¢/kWh |
| Payback Period | 11 years | 12.5 years |
| 20-Year Savings | $27,800 | $22,800 |
Verdict
Louisiana is the better state for solar ROI with $27,800 in 20-year savings and a 11-year payback period. Louisiana has more sun exposure at 4.8 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 Louisiana or Washington?
Louisiana gets more sun (4.8 peak hours/day vs 3.5). Louisiana has a faster payback (11 years) and Louisiana offers higher 20-year savings ($27,800).
How do solar costs compare between Louisiana and Washington?
A 6kW system costs $17,700 in Louisiana vs $18,600 in Washington before incentives. Both qualify for the 30% federal tax credit.
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Data verified March 2026 · Source: NREL, DSIRE, EIA