The proposed plants, if approved, would represent one of the biggest ever solar-power investments in the US.

Solar Millennium, which develops parabolic-trough power plants, will have to dig deep into its and other investors’ pockets. Each project has a net capacity to generate 240MW–250MW and is forecast to cost $1.1bn–$1.3bn. The development spree in three of the country’s biggest electricity-consuming regions is expected to provide a fresh investment jolt to the hard-hit solar sector.

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