How big is Sanborn BESS 3?

Sanborn BESS 3 has a reported capacity of 169 MW and an energy capacity of 676 MWh. Source: EIA Form 860.

What kind of plant is Sanborn BESS 3?

Sanborn BESS 3 is a batteries facility in Kern County, CA, participating in the CAISO market.

Where is Sanborn BESS 3 located?

Sanborn BESS 3 is in Kern County, CA, inside the CAISO balancing area.

Who operates Sanborn BESS 3?

Sanborn BESS 3 is operated by Terra-Gen Operating Co-BESS according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Sanborn BESS 3 generate?

Sanborn BESS 3 reported 223.9 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

Where does Sanborn BESS 3 connect to the grid?

Sanborn BESS 3 interconnects at Windhub Substation, on the Southern California Edison Company system.

How does Sanborn BESS 3 compare to other plants?

By capacity, Sanborn BESS 3 ranks #79 of 962 operating plants of the same technology nationally. It ranks #18 of 248 in CA.

Ask the Grid

⌘K

Grids

Library

Explore

Roadmap

Preferences

Free account

Open the analytical workspace

Detailed market and asset intelligence, plus the tools to keep and share the work.

Settlement-point price analytics
Plant & battery operating detail
Full Radar & Deep agent mode
Saved views, history & exports

Enterprise

Read your own grid

Your assets, topology, and trades — one decision surface with the agent.

Connect your own data
Private Grid
Probabilistic model forecasts
Data downloads & exports

Talk to us

About · Legal · Privacy · Changelog

BatteriesCAISO · Kern County

Sanborn BESS 3

Terra-Gen Operating Co-BESS · Kern County · CAISO

Sanborn BESS 3 is a battery energy storage facility with 169 MW of EIA-reported operating capacity and 676 MWh of reported energy capacity in Kern County, California, registered as EIA Plant ID 65672. Terra-Gen Operating Co-BESS owns and operates the plant. The facility interconnects at Windhub Substation at 220 kV. Its grid role is battery storage supporting cleaner, more reliable and resilient power delivery to the CAISO grid.

Website Open in grid

Open in ATG map

Asset analyst

plant:plant-65672

Ask about Sanborn BESS 3

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Power / energy: 169 MW / 676 MWh
Reported plant capacity and configuration.
Technology: Batteries
Primary generation technology.
Registry anchor: Plant 65672
Terra-Gen Operating Co-BESS · Kern County · CAISO
Storage duration: 4 hours
Battery subsystem rating.
Operating status: Operating
Sanborn BESS 3 is operating.
Grid connection: Windhub Substation
220 kV · Southern California Edison Company

Profile

Grid role: Battery storage supporting cleaner, more reliable and resilient power delivery to the CAISO grid.
Grid connection: Windhub Substation · 220 kV · Southern California Edison Company.
Physical build: Sanborn BESS 3 is an operational standalone battery power plant in Kern County, California, with one generating unit and 169 MW of nameplate capacity. The corresponding Edwards Sanborn Energy Storage resource is described as a 169 MW standalone, transmission-connected battery resource. Project-wide Edwards Sanborn sources report 3,287 MWh of storage and 120,720 installed batteries, but those aggregate figures are not allocated specifically to Sanborn BESS 3 and are therefore excluded from the exact-asset counts.

Structured profile

Reported capacity: 169 MW
Batteries
Energy: 676 MWh
4-hour storage duration
Operating status: operating
Sanborn BESS 3 is operating.
Interconnection: Windhub Substation
220 kV · Southern California Edison Company
Location

Units and generators

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

Generator	Capacity	Technology	Operation	Status
BESS	169 MW 169 MW summer	Batteries Electricity used for energy storage · BA	Oct 2023	Operating

Performance

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

Peer context

Technology capacity: 169 MW
National rank: #79
CA rank: #18

Monthly generation

Download CSV

Latest 12 months

223.9 GWh

Reported gross generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 net exchange

-32.9 GWh

Generation less station charging

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

UNKNOWN302355

NOT AVAILABLE · 66 kV

4.3 km

GOLDTOWN

Commercial, land, and environmental record

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

Land and environmental record

Parent-Project Land Area

Edwards Sanborn project occupies approximately 4,600 acres across private land and Edwards Air Force Base leasehold. Acreage applies to parent project, not individually allocated to Sanborn BESS 3 unit.

Terra-Gen project overview describes Edwards Sanborn Phase 1A & 1B spanning 4,600 acres total. No separate acreage allocation for BESS 3 unit identified.

Edwards Sanborn (Edsan) Solar Storage Phase 1A & 1B - Terra-Gen

Related-Project Parcel Record

Sep 14, 2022

Sanborn 2.0 project covers 31 parcels totaling ~1,200 acres: CUP 60 covers ~631.3 acres (18 APNs), CUP 61 covers ~573.6 acres (13 APNs). Records do not allocate parcels exclusively to BESS 3.

Related Sanborn 2.0 project (separate phase) parcel inventory from County Addendum. No individual parcel/acreage allocation for exact Sanborn BESS 3 unit identified.

Sanborn 2.0 Solar Project by Sanborn Solar, LLC

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

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorFinancierOfftakerRelated asset

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

2020
2020
Broader-Project Construction CommencedEdwards San...
Terra-Gen states that construction of the Edwards Sanborn Phase 1A/1B project began in 2020. A separate Sanborn BESS 3 construction-start date was not identified.
Oct 2023
Oct 2023

Reporting portfolio

EIA reporting entity

Terra-Gen Operating Co-BESS

Entity 64287

Operating portfolio

4 plants

1 states

Reported capacity

416 MW

Batteries

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Sanborn BESS 3Current	169 MW	CA
Sanborn BESS 2	100 MW	CA
Sanborn BESS 1	100 MW	CA
Sanborn BESS 4	47 MW	CA

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

View full reporting portfolio

Sanborn BESS 3

Ask about Sanborn BESS 3

Sanborn BESS 3

Ask about Sanborn BESS 3

Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Sanborn BESS 3

How big is Sanborn BESS 3?

What kind of plant is Sanborn BESS 3?

Where is Sanborn BESS 3 located?

Who operates Sanborn BESS 3?

How much electricity does Sanborn BESS 3 generate?

Where does Sanborn BESS 3 connect to the grid?

How does Sanborn BESS 3 compare to other plants?

Co-located assets

Related assets

AVEP BESS

Tumbleweed Energy Storage

Lancaster Area Battery

Sanborn BESS 1

Sanborn BESS 2

Condor Energy Storage LLC