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California already has some big long-distance transmission lines.

Path 65 (aka Pacific DC Intertie) is a 3.1 GW line connecting the hydroelectric dams of Washington and Oregon to Los Angeles.

Path 27 (Intermountain DC) is a 2.4 GW line connecting LA to a big-ass coal plant in Utah that is being shifted to wind+solar+natgas+hydrogen.

Path 66 is a set of AC lines that combine for 4.8 GW from Oregon to Southern California.

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Yes, but not of the places you listed are where you would put solar to supply California. If anything they will likely be used to move excess solar power out of California.

The map of solar production shows a compromise between building it in the most efficient place vs where demand and incentives is located. https://en.wikipedia.org/wiki/Solar_power_in_the_United_Stat...

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