Project Owner
Vaca Dixon BESS LLC and Arges BESS LLC
Docket Number
26-OPT-01
Capacity
157 megawatts, 457 megawatt-hours
Location
City of Vacaville, Solano County, California
Technology
Battery Storage System
Project Status
Under Review
Project Type
Opt-In
Project Description

Vaca Dixon BESS LLC and Arges BESS LLC (applicant) propose to construct and operate the Vaca Dixon Power Center Project (project). The project would be located on an approximately 10-acre site (Assessor’s Parcel Number [APN] 0133-060-060) within the City of Vacaville in Solano County, California. The project includes two battery energy storage system (BESS) facilities; the Vaca Dixon BESS (57 megawatts [MW], 57 megawatt-hours [MWh]), and the Arges BESS  (100 MW, 400 MWh), along with associated switchyard facilities, access roads, stormwater infrastructure, fencing, and control enclosures.  

The Vaca Dixon 57 MWh BESS would connect via a new 13.8-kilovolt (kV) overhead line to the existing 13.8/115 kV generator step-up transformer at the adjacent CalPeak Power Vaca Dixon Peaker Plant (VDPP), which is already tied to the adjacent Pacific Gas and Electric Company (PG&E) Vaca-Dixon Substation located north of Interstate-80 (I-80). The Arges BESS 400 MWh BESS would connect to the PG&E substation through a new approximately 2,350-foot 115 kV overhead transmission intertie (gen-tie) line. For approximately 1,500 feet, the 13.8 kV and 115 kV gen-tie circuits would be co-located on shared steel monopole structures to cross I-80 and reach the PG&E substation parcel (APN 0133-060-070). The remaining span would connect the Vaca Dixon BESS to the VDPP transformer and the Arges BESS to the PG&E Vaca-Dixon Substation.  

The project would operate 24 hours per day, 7 days a week, 365 days a year, for a 35-year anticipated lifespan, with remote control via supervisory control and data acquisition system. Following construction, the project would be staffed by 1-3 technicians performing periodic maintenance and inspections.   

Opt-In Certification

Prior to the June 30, 2022, signing of Assembly Bill (AB) 205, the CEC’s powerplant licensing jurisdiction was limited to thermal powerplants 50 megawatts (MW) or larger. To accelerate the state’s transition to renewable energy and to maintain electrical system reliability under this transition and during extreme climate-change-driven events, AB 205, as modified by AB 209 expands the types of facilities that can be certified by the CEC. This “Opt-in” certification process is available to solar photovoltaic and terrestrial wind energy powerplants of 50 MW or more, energy storage facilities of 200 megawatt-hours (MWh) or more, the electric transmission lines from these facilities to the first point of interconnection, and facilities that manufacture or assemble clean energy or storage technologies or their components with a capital investment of at least $250 million. In addition, thermal powerplants of 50 MW or more that do not use fossil or nuclear fuels may choose the Opt-in process rather than the CEC’s Application for Certification process. AB 205 authorizes the CEC to accept applications for these facilities and provides a new, streamlined process for their review and a decision by the CEC. The CEC is the “lead agency” under the California Environmental Quality Act and is required to prepare an environmental impact report for any facility that elects to opt-in to the CEC’s jurisdiction. With exceptions, the issuance of a certificate by the CEC for an eligible facility is in lieu of any permit, certificate, or similar document required by any state, local, or regional agency, or federal agency to the extent permitted by federal law, and supersedes any applicable statute, ordinance, or regulation of any state, local, or regional agency, or federal agency to the extent permitted by federal law. The CEC’s authority under the opt-in certification program does not supersede the authority of the California State Lands Commission to require leases and receive lease revenues, if applicable, or the authority of the California Coastal Commission, the San Francisco Bay Conservation and Development Commission, the State Water Resources Control Board or applicable regional water quality control board, or, in the case of manufacturing facilities, the applicable local air quality management district or the Department of Toxic Substances Control.

Contacts

Project Manager

Renee Longman
STEPsiting@energy.ca.gov
(Please enter project name in the email subject line)
(916) 937-3538

Public Participation Questions

Public Advisor
publicadvisor@energy.ca.gov
916-269-9595

Media Inquiries

Media & Public Communications Office
mediaoffice@energy.ca.gov
916-654-4989

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