Solar Panels in Seattle, WA
Seattle gets 3.2 peak sun hours/day with electricity at $0.115/kWh. Calculate panels needed, cost after 30% ITC, and payback period.
Sun Hours
3.2/day
Rate
$0.115/kWh
Cost/Watt
$2.95
Net Metering
Yes
☀️ Seattle Solar Calculator
8,261 kWh
Panels
269
System Size
107.6 kW
Annual kWh
100,541
Net Cost
$222,194
Savings/yr
$11,562
Payback
19.2 yrs
25-Yr Savings
$66,856
System Sizes in Seattle
| Monthly kWh | Panels | kW | Net Cost | Savings/yr | Payback |
|---|---|---|---|---|---|
| 500 | 17 | 6.8 | $14,042 | $731 | 19.2 yrs |
| 750 | 25 | 10.0 | $20,650 | $1,075 | 19.2 yrs |
| 1,000 | 33 | 13.2 | $27,258 | $1,418 | 19.2 yrs |
| 1,500 | 49 | 19.6 | $40,474 | $2,106 | 19.2 yrs |
| 2,000 | 66 | 26.4 | $54,516 | $2,837 | 19.2 yrs |
| 2,500 | 82 | 32.8 | $67,732 | $3,525 | 19.2 yrs |
Solar Guide for Seattle (2026)
Seattle at latitude 47.61°N receives 3.2 peak sun hours/day. At $0.115/kWh, solar offers solid long-term savings.
Incentives: Federal ITC + sales tax exemption.
NEC Solar Requirements
All installations must comply with NEC Article 690: rapid shutdown (690.12), conductor sizing at 125% (690.8), and proper grounding per NEC 250. Use our Solar Wire Size Calculator for conductor sizing.
Disclaimer: Estimates only. Consult a licensed solar installer. NEC Article 690 compliance required.
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New York City
3.6 hrs · $0.225/kWh
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5.6 hrs · $0.28/kWh
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3.9 hrs · $0.155/kWh
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5 hrs · $0.135/kWh
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6.6 hrs · $0.138/kWh
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3.9 hrs · $0.162/kWh
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5.2 hrs · $0.125/kWh
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5.5 hrs · $0.148/kWh
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5.3 hrs · $0.148/kWh
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4.7 hrs · $0.135/kWh
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3.8 hrs · $0.27/kWh
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6.4 hrs · $0.13/kWh
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3.5 hrs · $0.13/kWh
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4 hrs · $0.145/kWh
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5.4 hrs · $0.142/kWh
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4.7 hrs · $0.128/kWh
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5 hrs · $0.3/kWh
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3.5 hrs · $0.185/kWh
Nashville
4.4 hrs · $0.125/kWh
Salt Lake City
5.3 hrs · $0.115/kWh
Raleigh
4.7 hrs · $0.125/kWh
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5.5 hrs · $0.25/kWh
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5.3 hrs · $0.145/kWh
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5.3 hrs · $0.3/kWh
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6.4 hrs · $0.135/kWh
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6.2 hrs · $0.14/kWh
See also: Solar in Washington