Solar Panels in Washington may sound surprising in a state famous for rainy weather, but Washington still averages 170–180 sunny days annually. Combined with high electricity rates and strong incentives, solar adoption is growing quickly.
Cost of solar panels in Washington
Residential systems typically cost $13,000 to $23,000 before incentives. Price per watt averages $2.6–3.0. A typical household using 700–1,000 kWh monthly often installs a 5–7 kW system.
Incentives and programs
Washington provides attractive benefits for solar owners:
- Federal Solar Tax Credit (30%).
- State sales tax exemption on solar systems up to 100 kW.
- Utility rebate programs in select regions.
Hyperion (Runergy) 405W Solar Panel 108 Cells PERC Bifacial HY-DH108P8B-405 Clearance
Buy now
ZNShine Solar 435W Solar Panel 108 Cell TOPCon Bifacial All-Black ZXM7-UHLDD108-435 Clearance
Buy now
LONGi 360W Solar Panel 72 cell Mono PERC LR6-72PH-360M Wholesale 23 panels per pallet
Buy now
LONGi 375W Solar Panel 144 cell PERC Bifacial LR6-72HBD-375MC Wholesale 26 panels per pallet
Buy now
LONGi 370W Solar Panel 144 cell PERC Bifacial LR6-72HIBD-370M Wholesale 35 panels per pallet
Buy now
Boviet 440W Solar Panel 144 Cell PERC Bifacial BVM6612M-440S-H-HC-BF-DG Wholesale 30 panels per pallet
Buy now
LONGi 375W Solar Panel 144 cell Mono PERC LR6-72HPH-375MC Commercial 660 panels per container (Truckload)
Buy now
Regitec 550W Solar Panel 144 Cell RMH72-550S1 Commercial 620 panels per Container (Truckload)
Buy now
LONGi 370W Solar Panel 144 cell PERC Bifacial LR6-72HIBD-370M Commercial 630 panels per Container (Truckload)
Buy now
LONGi 375W Solar Panel 144 cell PERC Bifacial LR6-72HBD-375MC Commercial 572 panels per container (Truckload)
Buy now
Regitec 415W Solar Panel 108 Cell RMH54/415B1 Commercial 936 panels per Container (Truckload)
Buy now
GSTAR 550W Solar Panel 144 Cell PERC Bifacial GSP7G72M(H)550WT Commercial 620 panels per Container (Truckload)
Buy now
Regitec 430W Solar Panel 108 Cell All-Black Bifacial RMHT54/430AB2 Commercial 936 panels per Container (Truckload)
Buy now
Regitec 575W Solar Panel 144 Cell TOPcon Bifacial Glass-Glass RMHT72/575S2 Commercial 720 panels per Container (Truckload)
Buy now
Net metering in Washington
Utilities must offer net metering at retail rates for systems up to 100 kW. Excess credits roll over month to month, helping maximize ROI.
Payback and ROI
With incentives and high electricity prices (around $0.19 per kWh in 2025), payback averages 8–11 years. Lifetime savings can reach $25,000–$35,000.
FAQ
How much do solar panels cost in Washington? About $2.8 per watt.
Are there state incentives? Yes — sales tax exemptions and utility rebates.
Is solar worth it in Washington’s climate? Yes — long summer days generate strong output.
How long do Aptos panels last? 25+ years.
Conclusion
Washington proves solar works even in cloudy states. Incentives and fair net metering make solar profitable, and Aptos panels provide long-term reliability.