How big is Arlington Energy Center II?

Arlington Energy Center II has a reported capacity of 365 MW and an energy capacity of 528 MWh. Source: EIA Form 860.

What kind of plant is Arlington Energy Center II?

Arlington Energy Center II is a Batteries, Solar Photovoltaic facility in Riverside County, CA, participating in the CAISO market.

Where is Arlington Energy Center II located?

Arlington Energy Center II is in Riverside County, CA, inside the CAISO balancing area.

Who operates Arlington Energy Center II?

Arlington Energy Center II is operated by Arlington Energy Center II according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Arlington Energy Center II generate?

Arlington Energy Center II reported 640.6 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

Where does Arlington Energy Center II connect to the grid?

Arlington Energy Center II interconnects at Colorado River Substation, on the Southern California Edison system.

How does Arlington Energy Center II compare to other plants?

By capacity, Arlington Energy Center II ranks #120 of 7,234 operating plants of the same technology nationally. It ranks #23 of 939 in CA.

Arlington Energy Center II — 365 MW solar farm, CA

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Arlington Energy Center II — 365 MW solar farm, CA · Ask the Grid

Overview

Generation / storage: 365 MW total / 528 MWh storage
Reported plant capacity and configuration.
Technology: Solar + battery storage
Primary generation technology.
Registry anchor: Plant 64481
Arlington Energy Center II · Riverside County · CAISO
Storage duration: 4 hours
Battery subsystem rating.
Operating status: Operating
Arlington Energy Center II is operating.
Grid connection: Colorado River Substation
230 kV · Southern California Edison

Profile

Grid role: Co-located photovoltaic generation with battery storage; the battery component is registered as a New Non-Generation resource in CAISO.
Grid connection: Colorado River Substation · 230 kV · Southern California Edison.

Structured profile

Reported capacity: 365 MW
Batteries, Solar Photovoltaic
Energy: 528 MWh
4-hour storage duration
Operating status: operating
Arlington Energy Center II is operating.
Interconnection: Colorado River Substation
230 kV · Southern California Edison
Location: Riverside County
CAISO

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
AEC1	100 MW 100 MW summer	Solar Photovoltaic Solar · PV	Mar 2022	Operating
AEC2	133 MW 133 MW summer	Solar Photovoltaic Solar · PV	Oct 2023	Operating
AEC2B	132 MW 132 MW summer	Batteries Electricity used for energy storage · BA	Aug 2022	Operating

Performance

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

Peer context

Technology capacity: 233 MW; Solar Photovoltaic
National rank: #120; of 7,234 operating peers
CA rank: #23; of 939 operating peers

Monthly generation

Download CSV

Latest 12 months

640.6 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

19.8%

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

BUCK

IN SERVICE · 230 kV

11.8 km

BLYTHE WALC

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 Amendment And Restatement

Jul 10, 2020

Amended and Restated PPA effective July 10, 2020 covers full facility: 233 MW AC PV + 132 MW AC / 528 MWh lithium-ion battery storage = 365 MW guaranteed total facility capacity. 15 contract years. Expected full commercial operation October 1, 2022.

365 MW contracted15 yearsArlington Energy Center II, LLC · Clean Power Alliance of Southern California

Source

Land and environmental record

Emissions Control

Oct 16, 2024

Dust-control measures per Rule 403: perimeter watering, short-term stabilization, high-wind actions, signage, inspection, and fugitive-dust control

MDAQMD permit DCP000155 incorporates Rule 403 dust-control plan requiring perimeter watering, stabilization and high-wind measures, signage and MDAQMD inspection, and prohibition on visible fugitive dust beyond property line.

Mojave Desert Air Quality Management District Permit Search Site

Environmental Compliance Milestone

CEQA Environmental Impact Report prepared; mitigation measures conditioned on approval; mitigation monitoring/reporting plan adopted

CDFW permit amendment records confirm Environmental Impact Report was prepared, mitigation measures were made conditions of project approval, and mitigation reporting or monitoring plan was adopted per CEQA.

McCoy Solar Energy Project (California Endangered Species Act Incidental Take Permit No. 2081- 2012-026-06 A1 (ITP))

Species Protection Permit

Jul 15, 2022

California Incidental Take Permit No. 2081-2012-026-06, Minor Amendment No. 1

CDFW minor amendment (July 15, 2022) to McCoy Solar Energy Project ITP expressly added Arlington Energy Center II, LLC as permittee. Each permittee is responsible for conditions applicable to its designated area.

MINOR AMENDMENT NO

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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AssetProject companyFinancierOwner / operator

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Mar 2013
Mar 2013
BLM PermittingClean energ...
The Bureau of Land Management originally permitted the Arlington Solar project along with the McCoy Solar Project and a related land-use-plan amendment.
Mar 2022
Mar 2022

Arlington Energy Center II