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20 MW BESS operating in Orange, CA — California Independent System Operator
20 MW
Nameplate Capacity
2
Generators
units
Batteries
Technology
2021
Operating Since
Coordinates
33.7147, -117.8531
County
Orange, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Hecate Energy Johanna Facility LLC | — | — |
| Owner(s) | Hecate Energy Johanna Facility LLC | — | — |
| Status | Operating | — | — |
The Hecate Energy Johanna Facility is a 20 MW battery energy storage system (BESS) located in Orange County, California. The plant began operating in 2021 and is owned and operated by Hecate Energy Johanna Facility LLC. The facility utilizes two generators with battery technology and has a total storage capacity of 40 MWh, providing a duration of 4 hours. The battery chemistry is lithium-ion (LIB). The plant's primary fuel is listed as MWH, indicating it draws power from the grid to charge the batteries.
The Hecate Energy Johanna Facility operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The facility ranks as the 186th largest power plant in California out of 300, and 687th nationally out of 1205. Financial data indicates the plant has a power purchase agreement (PPA) price of $13.23 per MWh, according to FERC EQR filings.
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
12.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
−268 MWh
Net Charging
-3.3K MWh
Annual Net Energy
-1.9%
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.
Hecate Energy Johanna Facility LLC · Data from 2022–2025
$13.2/MWh
PPA Price
Point of Interconnection
Nearest Substation
Johanna Substation · 220 kV
Substation Distance
< 10 km
Operator
Southern California Edison
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
NODE
Pricing Hub
TH_SP15_GEN-APND
Node Source
EIA-860 direct report
Last updated 2026-03-14
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