Project scope
Plan: 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.
Reported status and procurement
- Reported development
Plan: The proposed operating arrangement is unstaffed after construction, with control from an offsite control room through SCADA and periodic inspections and maintenance as necessary.
- Procurement availability
- Unknown / not established
Reported regulatory context
CEC docket 24-OPT-05; project type is listed as Opt-In and status as Under Review.
A source report alone does not establish current progress or an open buying window.
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.)
