Solar power in Washington (state)

As of the first quarter of 2023, Washington State has 604 MW of solar power electricity generation.^[1] This is an increase from about 300 MW in 2021 and 27 MW in 2013.

Solar installation, Shelton

Washington 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.^[2][3]

Amount of sunlight

The average insolation in Washington's two largest cities are as follows.

In the charts, a peak sun hour is one kilowatt-hour per square meter of solar irradiance.^[4]

Source: NREL[5]

Source: NREL[6]

Installed generation capacity

Total grid connected

Grid-Connected PV Capacity (MW)[7][8][9][10][11][12][13][14]
Year	Capacity	Change	% Change
2007	1.9
2008	3.7	1.8	95%
2009	5.2	1.5	41%
2010	8.0	2.9	54%
2011	12.3	4.2	54%
2012	19.5	7.2	59%
2013	27.4	7.9	41%
2014	39	7.2	42%
2015	62	26	59%
2016	85	23	37%
2017	105	20	23%
2018	169	64	61%
2019	216	47	27%
2020	250.3	34.3	15%
2021	297.6	47.3	%
2022	585	287.4	%

Utility-scale

Utility-scale solar generation in Washington (GWh)^[15]

Year	Total	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2018	2	0	0	0	0	0	0	0	0	0	0	1	1
2019	43	2	2	4	4	4	5	5	5	4	4	2	2
2020	47	1	3	4	5	5	5	7	6	4	4	2	1
2021	50	1	2	5	6	6	7	7	6	5	4	2	1
2022	83	1	3	5	5	6	6	7	6	4	13	14	11
2023	363	15	23	34	42	16	52	52	45	35	27	16	8
2024		11	18

See also

• Renewable energy portal
• Energy portal
• United States portal

• List of power stations in Washington#Solar
• Wind power in Washington (state)
• Solar power in the United States
• Renewable energy in the United States