Arizona Public Service Company (APS) announced Monday that it will tender 150MW of solar and 250MW of wind resources to commercial partners by 15 September.

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The planned solar generation will be owned by APS and designed with the potential for future energy storage. It will be switched on by 2021, according to a company release.

This added capacity will support the regional utility's target of expanding its renewable energy portfolio to around 2,500MW by 2021 – or enough to power half a million homes.

Solar accounts for 6.42% of Arizona's electricity and employs more than 7,500 people in the state, according to the Solar Energies Industries Association.

An independent, third-party monitor will review the competitive procurement process. More specific information about the tender will be released in the coming weeks.

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