SunPowerPeek

Missouri vs Washington Solar Comparison

Missouri gets more sun (4.4 hrs/day) while Missouri has the faster payback (10.8 years).Missouri offers higher 20-year savings at $28,000.

Missouri

4.4 hrs

10.8yr payback

$28,000

20yr savings

Washington

3.5 hrs

12.5yr payback

$22,800

20yr savings

Side-by-Side Comparison

MetricMissouriWashington
Peak Sun Hours4.4 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 Rate13.78¢/kWh11.26¢/kWh
Payback Period10.8 years12.5 years
20-Year Savings$28,000$22,800

Verdict

Missouri is the better state for solar ROI with $28,000 in 20-year savings and a 10.8-year payback period. Missouri has more sun exposure at 4.4 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 Missouri or Washington?

Missouri gets more sun (4.4 peak hours/day vs 3.5). Missouri has a faster payback (10.8 years) and Missouri offers higher 20-year savings ($28,000).

How do solar costs compare between Missouri and Washington?

A 6kW system costs $18,300 in Missouri 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