According to dsireusa.org (http://www.dsireusa.org/incentives/incentive.cfm?Incentive_Code=WA04F&re...):
In May 2009, Washington passed SB 6170, effective July 1, 2009. With the passage of this legislation, the sales and use tax exemption was extended to June 30, 2011 for systems generating electricity using fuel cells, wind, sun, biomass energy, tidal or wave energy, geothermal, anaerobic digestion or landfill gas. The tax exemption for solar water heating will expire June 30, 2009.
This is an unfortunate oversight in what appeared on the surface to be a huge win for the Solar industry here in the State of Washington. Consumers looking to add a Solar Hot Water system to their home should do so as soon as possible since they will be required to pay state and local tax on their purchase starting July 1.
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