Solar power in Washington has expanded to 27 MW, largely due to a 30% federal tax credit, and declining installation costs. Washington also pays a feed-in tariff of up to $5,000/year of 15 cents/kWh, which is increased by a factor of 2.4 if the panels are made in the state and by an additional 1.2 if the inverters are made in state.
Installed capacity
The average insolation is approximately 19% higher in Spokane than in Seattle.
References
Solar power in Washington Wikipedia(Text) CC BY-SA