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60 MW BESS operating in Monterey, CA
60 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2021
Operating Since
Coordinates
35.8667, -120.3294
County
Monterey, CA
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arevon Energy, Inc. | — | — |
| Owner(s) | Arevon Energy, Inc. | — | — |
| Status | Operating | — | — |
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
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
California Independent System Operator (CISO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−656 MWh
Net Charging
-11.0K MWh
Annual Net Energy
-2.1%
Capacity Factor
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.
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2021
$1,796/kW
Est. Construction Cost
Total estimated cost: $107.8M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market 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
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
View all 5 articlesForward forecasts, scenario decomposition, and risk-decision tooling for this asset.