# Corby Battery Energy Storage System Project. Publisher: CapexCue Canonical dossier: Dossier reference: release 2 (6bb5c871-99a2-47fa-a36b-28233b5d9c2d) Released project intelligence Oldest supporting observation: 2026-11-07 20:40:49.031116+00:00 Dossier released: 2026-11-08T06:36:34.818610+00:00 Source report dates and capture dates are listed per fact below; neither establishes an event date. ## Project summary The California Energy Commission (CEC) identifies the project as the Corby Battery Energy Storage System Project. Its summary lists 300 MW and 1,200 MWh; its description proposes a battery storage system on an approximately 40.3-acre parcel southwest of Kilkenny Road and Byrnes Road in Solano County, California. The proposed grid connection is an approximately 1.1-mile, 230-kV gen-tie to PG&E’s existing Vaca-Dixon Substation, with overhead and underground portions. (CEC project summary and description.) The CEC summary lists North Bay Interconnect, LLC and Corby Energy Storage, LLC as project owners. The description identifies Corby Energy Storage as the applicant proposing to construct, own, and operate the project; PG&E would construct, own, and operate specified gen-tie facilities, including a new 230-kV Double Bus Bay at the existing substation. The CEC lists docket 24-OPT-05 and status “Under Review.” (CEC project summary and description.) Separately, a PG&E progress table hosted by WECC describes Corby as a battery storage generation plant with 300 MW net output to the Vaca-Dixon 230-kV Bus in Vacaville. It lists Jan-2027 in the “Date in Service” column and “ENGINEERING,” which the table defines as “Engineering and design stage.” These are utility-side interconnection entries, not confirmation of plant output or actual service. The table heading gives planned-project context and a waiver qualification through 2025, but no Corby-specific waiver decision date. (PG&E progress report, Table 2, p. 6.) The CEC page’s Past Events section lists an Informational and Environmental Scoping Meeting dated November 6, 2025, and a CEC Staff Assessment Public Meeting dated September 1, 2026; the listings do not confirm either meeting occurred. (CEC project page, Past Events.) Reading scope: The CEC project page was observed on November 7, 2026. For the PG&E report, only page 6 of 12 was reviewed; other pages and graphical content were not interpreted. The page-6 table is a utility-side report, not a whole-project status assessment. ## Evidence limits and unknowns - The cited sources do not establish that the listed CEC meetings occurred. (CEC project page, Past Events.) - The cited sources do not establish actual energization, commissioning, certification, commercial operation, or achieved output. The PG&E date and engineering entry are planned or reported interconnection details. (CEC project summary and description; PG&E progress report, Table 2, p. 6.) - No available procurement package, open procurement, or buying window is established by the cited material. (CEC project page; PG&E progress report, p. 6.) - The PG&E table heading does not give a Corby-specific waiver decision date. (PG&E progress report, Table 2, p. 6.) - The reviewed PG&E report material does not establish whether later pages or graphical content contain additional project information. (PG&E progress report, coverage reviewed: p. 6 of 12.) Current purchasing availability: unknown. Source-dated plans do not establish current progress or available supplier packages. ## Project metadata Country: United States Region: North America Physical assets: Battery Storage Derived from the exact released evidence; unresolved fields remain unclassified. ## Project category Energy Derived from the reviewed scope statement; delivery stage remains unclassified. The CEC summary lists capacity as 300 MW and 1,200 MWh. The description says Corby Energy Storage, LLC proposes a 300-MW battery energy storage system with a project substation, inverters, and ancillary facilities including fencing, a sound barrier, roads, retention basins, storage containers, and SCADA. The proposed connection to PG&E’s existing Vaca-Dixon Substation is an approximately 1.1-mile, 230-kV gen-tie with overhead and underground portions. Separately, PG&E would install a new 230-kV Double Bus Bay at that existing substation and construct, own, and operate the gen-tie segment from the ownership-change pole south of I-80 to the first point of interconnection, including five of the ten structures. Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 Project overview Oldest decisive evidence: 2026-11-07 20:40:49.031116+00:00 Newest evidence: 2026-11-07T16:24:59+01:00 Knowledge reviewed: 2026-11-08T06:36:34.818610+00:00 Publication reviewed: 2026-11-08T06:36:34.818610+00:00 ## Date The page lists an Informational and Environmental Scoping Meeting dated November 6, 2025, and a CEC Staff Assessment Public Meeting dated September 1, 2026, under Past Events; the listings do not confirm that the meetings occurred. Status: reported Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Name Corby Battery Energy Storage System Project. Status: reported Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Owner The CEC summary lists North Bay Interconnect, LLC and Corby Energy Storage, LLC as project owners. The description identifies Corby Energy Storage, LLC as applicant proposing to construct, own, and operate the project; PG&E would construct, own, and operate the specified portion of the gen-tie. Status: reported Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Scope The CEC summary lists capacity as 300 MW and 1,200 MWh. The description says Corby Energy Storage, LLC proposes a 300-MW battery energy storage system with a project substation, inverters, and ancillary facilities including fencing, a sound barrier, roads, retention basins, storage containers, and SCADA. The proposed connection to PG&E’s existing Vaca-Dixon Substation is an approximately 1.1-mile, 230-kV gen-tie with overhead and underground portions. Separately, PG&E would install a new 230-kV Double Bus Bay at that existing substation and construct, own, and operate the gen-tie segment from the ownership-change pole south of I-80 to the first point of interconnection, including five of the ten structures. Status: planned Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Activity The proposed operating arrangement is unstaffed after construction, with control from an offsite control room through SCADA and periodic inspections and maintenance as necessary. Status: planned Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Location An approximately 40.3-acre privately owned parcel southwest of the intersection of Kilkenny Road and Byrnes Road, in Solano County, California; Assessor’s Parcel Number 0141-030-090. Status: reported Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Regulatory CEC docket 24-OPT-05; project type is listed as Opt-In and status as Under Review. Status: reported Attribution: California Energy Commission (externally supplied capture) Source: California Energy Commission (externally supplied capture) — https://www.energy.ca.gov/powerplant/battery-storage-system/corby-battery-energy-storage-system-project | published unknown | observed 2026-11-07T20:46:59.876590+00:00 ## Source qualifications and unresolved questions - Canonical facts retain their original source scope. Later source qualifications do not redefine the original asset or establish open supplier procurement. The Corby row describes a Battery Storage generation plant with 300 MW net output to PG&E’s Vaca-Dixon Substation 230 kV Bus in Vacaville, Solano County, California. This is utility-side interconnection reporting, not evidence of achieved output. [u0001, page 6] (reported). PG&E via WECC (externally supplied capture), source observed 2026-11-07; https://www.wecc.org/sites/default/files/documents/progress_report/2026/PGAE%202026%20APR.pdf The row lists Jan-2027 under “Date in Service” (January 2027). In the context of Table 2’s planned-project heading, this is a listed utility-side date, not confirmation of actual service. [u0001, page 6] (planned). PG&E via WECC (externally supplied capture), source observed 2026-11-07; https://www.wecc.org/sites/default/files/documents/progress_report/2026/PGAE%202026%20APR.pdf The Corby row lists ENGINEERING; the table footnote defines this as “Engineering and design stage.” [u0001, page 6] (reported). PG&E via WECC (externally supplied capture), source observed 2026-11-07; https://www.wecc.org/sites/default/files/documents/progress_report/2026/PGAE%202026%20APR.pdf Table 2 is headed “Planned Generation Interconnection Projects” and states “Waiver of ‘Significant Transmission Project’ Status Granted in years up to and including 2025.” This is table-level context; the page does not give a Corby-specific waiver decision date. [u0001, page 6] (reported). PG&E via WECC (externally supplied capture), source observed 2026-11-07; https://www.wecc.org/sites/default/files/documents/progress_report/2026/PGAE%202026%20APR.pdf ## Cite this dossier CapexCue — Corby Battery Energy Storage System Project. — dossier released 2026-11-08T06:36:34.818610+00:00, release 2 (6bb5c871-99a2-47fa-a36b-28233b5d9c2d) — https://capexcue.com/projects/corby-battery-energy-storage-system-project/. For current information and later dossier updates, visit . 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