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200 MW BESS operating in Contra Costa, CA — California Independent System Operator
200 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2022
Operating Since
Coordinates
38.0288, -121.9009
County
Contra Costa, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Diablo Energy Storage, LLC | — | — |
| Owner(s) | Diablo Energy Storage, LLC | — | — |
| Status | Operating | — | — |
Diablo Energy Storage is a 200 MW battery energy storage system (BESS) located in Contra Costa County, California. The facility, which began operating in 2022, is owned and operated by Diablo Energy Storage, LLC. The plant utilizes batteries as its primary fuel source, with a total storage capacity of 800 MWh, providing a duration of 4 hours. The battery chemistry is lithium-ion (LIB). Diablo Energy Storage ranks 64th out of 112 power plants in California and 303rd out of 514 plants nationally.
The facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates a power purchase agreement (PPA) price of $6.95 per MWh, as reported to FERC. The plant has been the subject of 6 news articles, with 5 focusing on grid-related topics and 1 on industry news.
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
220.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
−2.3K MWh
Net Charging
-35.9K MWh
Annual Net Energy
-2.0%
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.
Diablo Energy Storage, LLC · Data from 2022–2025
$7.0/MWh
PPA Price
Market Position
ISO/RTO Market
CAISO
LMP Node
LMECCT2_7_B1
Pricing Hub
TH_NP15_GEN-APND
Location Type
Pricing Node
Node Source
Curated node match
Last updated 2026-03-26
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