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Oregon vs Washington Solar Comparison

Oregon gets more sun (4.0 hrs/day) while Oregon has the faster payback (10.8 years).Oregon offers higher 20-year savings at $26,200.

Oregon

4.0 hrs

10.8yr payback

$26,200

20yr savings

Washington

3.5 hrs

12.5yr payback

$22,800

20yr savings

Side-by-Side Comparison

MetricOregonWashington
Peak Sun Hours4.0 hrs3.5 hrs
Cost per Watt$3.05$3.10
6kW System Cost$18,300$18,600
Federal Tax Credit30%30%
State Tax CreditNoneNone
State RebateNoneNone
Net MeteringFull Net MeteringFull Net Metering
Electricity Rate12.55¢/kWh11.26¢/kWh
Payback Period10.8 years12.5 years
20-Year Savings$26,200$22,800

Verdict

Oregon is the better state for solar ROI with $26,200 in 20-year savings and a 10.8-year payback period. Oregon has more sun exposure at 4.0 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 Oregon or Washington?

Oregon gets more sun (4 peak hours/day vs 3.5). Oregon has a faster payback (10.8 years) and Oregon offers higher 20-year savings ($26,200).

How do solar costs compare between Oregon and Washington?

A 6kW system costs $18,300 in Oregon 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