Cal Flats BESS — Plant Summary
- EIA Plant ID
- 63930
- Capacity
- 60 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Monterey, CA
- Operating Since
- 2021
- Generators
- 1
- Operator
- Arevon Energy, Inc.
- Parent Company
- —
- Annual Generation
- -10,995 MWh
- Capacity Factor
- -2.1%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Cal Flats BESS
OperatingBESS
Ranked #79 of 191 BESS plants in CA#380 of 837 nationally
60 MW BESS operating in Monterey, CA — California Independent System Operator
EIAWD
60 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2021
Operating Since
Location
Coordinates
35.8667, -120.3294
County
Monterey, CA
Nearby Plants
- Regulus Solar ProjectSolar60 MW · 1.8 km
- CED AvenalSolar15.8 MW · 21.6 km
- Sand Drag LLCSolar19 MW · 24.1 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arevon Energy, Inc. | — | — |
| Owner(s) | Arevon Energy, Inc. | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Cal Flats BESS is a 60 MW battery energy storage system located in Monterey County, California. The plant began operating in 2021 and is owned and operated by Arevon Energy, Inc. It is interconnected to the California Independent System Operator (CAISO) balancing authority within the Western Electricity Coordinating Council (WECC) NERC region. The facility consists of a single generator utilizing battery technology with a total storage capacity of 242 MWh, yielding a duration of approximately 4.03 hours. The battery chemistry is lithium-ion (LIB).
Cal Flats BESS is ranked as the 145th largest power plant in California out of 300, and 584th nationally out of 1205. The plant's primary fuel is listed as "MWH," indicating it draws power from the grid to charge its batteries.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
−656 MWh
Net Charging
-11.0K MWh
Annual Net Energy
-2.1%
Capacity Factor
Jan 2023 – Dec 2025
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
CAISO
LMP Node
C877P2C2_7_N001
Pricing Hub
TH_ZP26_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
News & Articles (10)Beta
Hazards·wildfire
Fire at Arevon Energy’s California solar-plus-storage facility
CAL FIRE responded to a possible vegetation fire in the area of IPP Arevon Energy's California Flats solar-plus-storage project.
CAL FIRE (other)Arevon Energy (operator)
Energy-Storage.News·6 months ago
Hazards·wildfire
Monitoring continues at Parkfield battery storage facility after fire is extinguished.
The Aug. 30 fire at the California Flats Energy Storage Project in a solar farm near Parkfield in southern Monterey County was extinguished...
California Flats Energy Storage Project (other)
Monterey County Weekly·6 months ago
Hazards·wildfire
UPDATE: Authorities release new details on solar farm fire in Monterey Co.
The Monterey County Sheriff's Office has released more information on the solar farm fire that triggered an evacuation order in southeast Monterey County...
Monterey County Sheriff's Office (other)
KSBY·6 months ago
Hazards·wildfire
Evacuation orders lifted for Parkfield Solar Plant fire
Update 8:20 p.m.: Evacuation orders were lifted. Public safety officials continue to monitor the fire and a Tesla Field Service Response...
Tesla (other)
KSBW·6 months ago
Last updated 2026-03-14
View all 10 articles