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May 20, 2026
The California Independent System Operator (CAISO) Board of Governors has approved the ISO’s 2025-2026 transmission plan, which accommodates 45 GW of new solar PV.
May 30, 2025
Solar and wind curtailment have increased by 29% between 2023 and 2024 in California, according to the US Energy Information Administration.
June 17, 2024
The California Independent System Operator (CAISO) has taken control of a 500kV, 125-mile transmission line between California and Arizona.
June 5, 2024
The Turlock Irrigation District (TID) has launched a request for proposals to add renewable power projects to its portfolio.
Premium
April 30, 2024
With more than 1TW of solar waiting for grid connection, PV Tech Premium looks at where the PV capacity is queued up in the US.
November 1, 2023
Solar curtailments in California, the US, have never been higher in 2023, as solar generation outpaces transmission capacity upgrades, according to a report from the US Energy Information Administration (EIA).
May 23, 2023
California Independent System Operator (CAISO) has approved a transmission plan consisting of 45 projects for system expansion and upgrades with a cost of US$7.3 billion, including a total of more than 17GW of solar generation.
April 4, 2023
The plan also outlined some transmission projects to integrate the generation and storage resources, with the estimated cost of up to US$2.3 billion.
January 23, 2023
A 500kV, 125-mile transmission line between California and Arizona broke ground last week, promising to bring over 3GW of renewable energy capacity to the US Desert Southwest region.
December 9, 2022
The intense wildfires that ravaged California in the US in 2020 have been responsible for substantial solar energy forecasts errors, according to a study led by scientists at the National Center for Atmospheric Research (NCAR).

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