Initial operation of a 2 MW demonstration project began in 2016, with the power sold to Anaheim Public Utilities.[5] Additional projects of 20 MW and 250 MW are in various stages of planning, as of 2017.[6] The developers planned to have 700 MW online by 2021,[7] with full build-out by 2025.[8] The real estate investment firm CIM Group joined the project in 2014.[9] In 2017, plans for the site were downsized from 2,400 MW to 2,000 MW and 24,000 acres (9,700 ha) to 21,000 acres (8,500 ha).[2] Construction began in 2020.[10]
The first 125 MW phase of the Aquamarine project opened in September 2021, with the second 125 MW opening by the end of the year.[11]
The 250 MW Westlands Solar Blue also has 225.0 MW of batteries. Chestnut has 135 MW of batteries.[12] The 19.9 MWAC (26 MWDC) Westlands Almond is part of a agrivoltaics scheme, using sheep for vegetation control.[13] Westlands Grape and Cherry are expected to be completed in December 2024.[12]
RE Slate, Mustang One and Two, RE Kent South, and American Kings Solar are solar plants which border Westlands Solar Park to the northeast with a combined total of 441 MW of capacity.