How big is Edwards Sanborn E2?

Edwards Sanborn E2 has a reported capacity of 257.8 MW and an energy capacity of 250 MWh. Source: EIA Form 860.

What kind of plant is Edwards Sanborn E2?

Edwards Sanborn E2 is a Batteries, Solar Photovoltaic facility in Kern County, CA, participating in the CAISO market.

Where is Edwards Sanborn E2 located?

Edwards Sanborn E2 is in Kern County, CA, inside the CAISO balancing area.

Who operates Edwards Sanborn E2?

Edwards Sanborn E2 is operated by Terra-Gen Operating Co-Hybrid according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Edwards Sanborn E2 generate?

Edwards Sanborn E2 reported 293.4 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

How does Edwards Sanborn E2 compare to other plants?

By capacity, Edwards Sanborn E2 ranks #346 of 7,234 operating plants of the same technology nationally. It ranks #61 of 939 in CA.

Edwards Sanborn E2 — 258 MW solar farm, Kern County, CA

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Edwards Sanborn E2 — 258 MW solar farm, Kern County, CA · Ask the Grid

Overview

Generation / storage: 257.8 MW total / 250 MWh storage
Reported plant capacity and configuration.
Technology: Solar + battery storage
Primary generation technology.
Registry anchor: Plant 64879
Terra-Gen Operating Co-Hybrid · Kern County · CAISO
Storage duration: 2.1 hours
Battery subsystem rating.
Operating status: Operating
Edwards Sanborn E2 is operating.
Equipment: 161 PCS units
Installed equipment documented in public project records.

Profile

Grid role: Solar generation paired with lithium-ion battery storage used for energy arbitrage, frequency regulation, and ramping spinning reserve.
Context: Edwards Sanborn E2 is an operational 257.8 MW solar-and-battery plant ranked approximately #179 in the United States and #38 in California by capacity. It participates in the CAISO market and is one of the larger individual hybrid plants in the state.
Physical build: Edwards Sanborn E2 is an operational hybrid facility with two generating units: one 137.8 MW solar-photovoltaic generator with 146.9 MW DC capacity, thin-film CdTe modules, and dual-axis tracking, plus one 120 MW lithium-ion BESS generator with 250 MWh of storage. The EdSan 2 interconnection specification, cross-referenced by the California Energy Commission to EIA plant 64879, identifies 161 Power Electronics HEM FS3430M integrated inverter modules for EdSan 2; each module is rated 3.55 MVA at 40°C and derated to 3.43 MW at 50°C.

Structured profile

Reported capacity: 257.8 MW
Batteries, Solar Photovoltaic
Energy: 250 MWh
2.1-hour storage duration
Operating status: operating
Edwards Sanborn E2 is operating.
Location: Kern County
CAISO
Operator: Terra-Gen Operating Co-Hybrid

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
BESS	120 MW 120 MW summer	Batteries Electricity used for energy storage · BA	Apr 2022	Operating
PV	137.8 MW 137.8 MW summer	Solar Photovoltaic Solar · PV	Dec 2021	Operating

Performance

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

Peer context

Technology capacity: 137.8 MW; Solar Photovoltaic
National rank: #346; of 7,234 operating peers
CA rank: #61; of 939 operating peers

Monthly generation

Download CSV

Latest 12 months

293.4 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

13.3%

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

UNKNOWN302355

NOT AVAILABLE · 66 kV

9.8 km

UNKNOWN309319

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

Construction Stormwater Permit

Oct 5, 2020

WDID 6B152005002 under General Board Order R6T-2003-0004

The Lahontan Regional Water Quality Control Board issued a Notice of Applicability for Sanborn Solar under General Board Order R6T-2003-0004, with Waste Discharge Identification No. 6B152005002. The available record describes this as the Sanborn Solar construction-stormwater authorization; it does not allocate the authorization separately to EIA plant 64879.

4-16-09

Land-Use Permit

Sep 13, 2022

Conditional Use Permits 60 and 61, Map 196

Kern County's Notice of Determination states that Sanborn 2.0 required CUP No. 60 and CUP No. 61, both Map No. 196, for approximately 220 MW of solar and up to 4 GWh of battery storage on approximately 1,200 acres.

Sanborn 2.0 Solar Project by Sanborn Solar, LLC

Parcel Record

2022

Assessor parcel numbers identified in county staff records

Kern County staff records identify the Sanborn 2.0 footprint as including APNs 427-020-17, 427-020-18, 427-020-30, 427-020-34, 427-020-41, 427-020-45, 427-030-28, 427-030-29, 427-030-30, 427-030-31, and 427-030-32, among the 31 total parcels.

Source

Permitted Project Footprint

Sep 13, 2022

Approximately 1,200 acres across 31 parcels

The closest official land-use record for the EdSan 2/Sanborn 2.0 permitting footprint describes 31 parcels totaling approximately 1,200 acres in unincorporated Kern County. This scoped to the permitting footprint; do not attribute all acreage to EIA-64879 alone.

Sanborn 2.0 Solar Project by Sanborn Solar, LLC

Site Location And Land Tenure

2026

Private land near Mojave, California

Terra-Gen identifies EdSan 2 as a 368 MW solar-and-energy-storage project on private land near Mojave. The project was planned to be complete and operational by the end of 2026.

EdSan 2

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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AssetOwner / operatorContractorFinancierRelated asset

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

2021
2021
Broader project construction commencedEdwards & S...
Mortenson states that site construction for the broader Edwards & Sanborn solar-plus-storage project commenced in Q1 2021. The source does not provide an E2-only construction start date.
Dec 2021
Dec 2021

Reporting portfolio

EIA reporting entity

Terra-Gen Operating Co-Hybrid

Entity 64366

Operating portfolio

10 plants

1 states

Reported capacity

1,606.8 MW

Batteries · Solar Photovoltaic

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Edwards Sanborn E1A	293.3 MW	CA
Edwards Sanborn E1B	290.4 MW	CA
Edwards Sanborn E2Current	257.8 MW	CA
Edwards Sanborn E4	248.9 MW	CA
Edwards Sanborn 1C	148 MW	CA
Edwards Sanborn E5	115 MW	CA
Edwards Sanborn S1	84.6 MW	CA
Edwards Sanborn S3	70.7 MW	CA

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

View full reporting portfolio

Edwards Sanborn E2