Proxima has a reported capacity of 352 MW. Source: EIA Form 860.

What kind of plant is Proxima?

Proxima is a Solar Photovoltaic, Batteries facility in Stanislaus County, CA, participating in the CAISO market.

Where is Proxima located?

Proxima is in Stanislaus County, CA, inside the CAISO balancing area.

Who operates Proxima?

Proxima is operated by Proxima Solar, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Proxima generate?

Proxima reported 467.5 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

Where does Proxima connect to the grid?

Proxima interconnects at Fink Switching Station (FINK SW STA–PROXIMA SOLAR), on the Pacific Gas and Electric Company (PG&E) system.

How does Proxima compare to other plants?

By capacity, Proxima ranks #208 of 7,234 operating plants of the same technology nationally. It ranks #37 of 939 in CA.

Proxima — 352 MW solar farm, Stanislaus County, CA

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Proxima — 352 MW solar farm, Stanislaus County, CA · Ask the Grid

Overview

Reported capacity: 352 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Technology: Solar + battery storage
Primary generation technology.
Registry anchor: Plant 66270
Proxima Solar, LLC · Stanislaus County · CAISO
Operating status: Operating
Proxima is operating.
Grid connection: Fink Switching Station (FINK SW STA–PROXIMA SOLAR)
230 kV · Pacific Gas and Electric Company (PG&E)
Equipment: 430,000 panels
Installed equipment documented in public project records.

Profile

Grid role: Hybrid solar generation with battery storage; the battery record identifies arbitrage, ramping/spinning-reserve support, use of excess wind and solar generation, and direct support of the solar unit.
Grid connection: Fink Switching Station (FINK SW STA–PROXIMA SOLAR) · 230 kV · Pacific Gas and Electric Company (PG&E).
Physical build: CEI served as general/prime contractor for the Proxima Solar project. The disclosed scope comprises roughly 430,000 solar panels producing 252 MW DC, a substation, a SCADA system, and a battery energy storage system. CEI reported the BESS at 148 MW; the operational plant record identifies two generating units: one 162 MW / 648 MWh lithium-ion battery generator and one 190 MW bifacial, single-axis-tracking solar PV generator, totaling 352 MW.

Structured profile

Reported capacity: 352 MW
Solar Photovoltaic, Batteries
Operating status: operating
Proxima is operating.
Interconnection: Fink Switching Station (FINK SW STA–PROXIMA SOLAR)
230 kV · Pacific Gas and Electric Company (PG&E)
Location: Stanislaus County
CAISO
Operator: Proxima Solar, LLC

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Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
PRXBS	162 MW 162 MW summer	Batteries Electricity used for energy storage · BA	Apr 2024	Operating
PRXMA	190 MW 190 MW summer	Solar Photovoltaic Solar · PV	Jun 2024	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 190 MW; Solar Photovoltaic
National rank: #208; of 7,234 operating peers
CA rank: #37; of 939 operating peers

Monthly generation

Download CSV

Latest 12 months

467.5 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

15.0%

Using current reported nameplate capacity

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

STANISLAUS RECOVERY

NOT AVAILABLE · 115 kV

2.5 km

SALADO

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

PPA Execution And Amendment

Sep 24, 2018

For EIA Form 860 plant ID 66270, Sonoma Clean Power Authority's 20-year Proxima solar-plus-storage power contract was executed on September 24, 2018. The contract was amended on January 21, 2022, adding 20 MW of solar and 27 MW of storage, resulting in 70 MW of contracted solar and 32 MW / 128 MWh of storage. The reported delivery period was April 1, 2024 through March 31, 2044.

70 MW contracted20 yearsSonoma Clean Power Authority · Proxima Solar, LLC

PUBLIC Sonoma Clean Power Final 2023 RPS Procurement Plan_FINAL_CLEAN_Redacted.pdf

Land and environmental record

Environmental Compliance Milestone

Mar 29, 2021

Permit Application No. PLN2020-0061; State Clearinghouse No. 2021060330; approved March 29, 2021

The 2021 Proxima Solar Energy Center modification changed the approved layout and operational infrastructure and expanded the approved facility footprint by 25 percent. The County relied on a February 2021 Mitigated Negative Declaration Addendum and recorded no significant environmental impact.

Staff Approval Permit Application No. PLN2020-0061 - Proxima Solar Energy Center

Environmental Permit

Apr 19, 2012

Use Permit Application No. March 2010; State Clearinghouse No. 2011012006; Mitigated Negative Declaration

Stanislaus County Planning Commission approved the original Fink Road Solar Farm on April 19, 2012. The CEQA record reports no significant environmental impact, a Mitigated Negative Declaration, adopted mitigation measures, and CEQA findings.

Use Permit Application No. 2010-03 - Fink Road Solar Farm

Interconnection Environmental Review

Apr 14, 2022

PG&E Proxima Solar Interconnection & Fink Switching Station Project; Advice Letter 6529-E; T. No. 0003770; SAP Order No. 74017045

PG&E proposed an approximately 6-acre switching station and approximately 1,600 feet of transmission-line rerouting for the Proxima interconnection. The project was exempt from a separate CPUC authority-to-construct application under CPUC General Order 131-D because of the applicable CEQA review and minor-relocation provisions.

Pacific Gas & Electric Company ELC (Corp ID 39) Status of Advice Letter 6529E Disposition: Accepted Effective Date: 04-14-2022

Land Lease

2017

Approximately 1,600 acres of County-owned land leased for the solar project

Stanislaus County entered into a land option and lease agreement for County-owned land adjacent to the Fink Road Landfill. The agreement was assigned to Proxima Solar, LLC in September 2017.

Source

Original Project Water Infrastructure

2012

Original project design included a 100,000-gallon water tank for a 1-MW thermal steam-storage facility

The 2012 environmental project description included a 100,000-gallon water tank, engine room, and condensing unit within a metal structure. This is an original permitted-design feature and is not presented as confirmation of the final operating configuration.

Source

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetOrganizationOwner / operatorContractor

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Dec 8, 2009
Dec 8, 2009
Original Fink Road Solar Farm developmentSource
Stanislaus County selected JKB Development for a 12-month exclusive right to negotiate a long-term farming and potential solar-farm lease for the Fink Road site.
Sep 2017
Sep 2017
Lease/project-rights assignment to Proxima

Proxima