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Terra-Gen and Mortenson are developing the 1.8B USD, 1,420 MWac utilityCAISO queue 1632 identifies Sanborn Hybrid 3 as 1,420.24 MW solar generation facility paired and 672.27 MW battery equipment with energy storage across 8,500 acres in Mojave, Kern County, California, on CAISO 230 kV.1,400 MW net export, targeting December 31, 2026. EIA’s named plant contains individual phased generators. This is not proof of a new standalone $1.8B, 1,420 MW AC plant opening in 2028.
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The Kern County Planning and Natural Resources Department approved conditional use permits for the 1,420 MWac Sanborn Solar Hybrid Complex. Features 1,420 MWac of single-axis tracking bifacial photovoltaic arrays across 8,500 acres of flat Mojave Desert terrain. Represents an estimated 1.8 billion USD capital investment engineered by Terra-Gen CAISO Grid GenerationQueue row 113 gives an executed IA at Windhub 500 kV. Separate Sanborn Hybrid 4 queue 1790 is not the same request; the established Edwards & Sanborn campus is broader. EIA plant 69956 planned rows 297 and 578–580 lists October/December 2026 units, including a 210 MW battery and Mortenson. Interconnects to the Southern California Edison (SCE) / CAISO 230 kV transmission corridor near solar units of 55, 103 and 210 MW. These rows are partial phase-unit scope, not automatically the Windhub substation. Generates over 3.2 million megawatt-hours entire queue total. Timeline: December 31, 2026 is queue target, not completion of clean electricity annually to supply Southern California load centers. Timeline: planned project targeting commercial operation in December 2028 (estimated) under CAISO interconnection queue and state regulatory schedules.every broader Sanborn phase. Cost, 8,500-acre footprint and construction contractor identity are not established by these rows. Map follows EIA reporting point 34.996, -118.114; older imagery may predate buildout.
