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97 MW BESS operating in Fresno, CA — California Independent System Operator
97 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
36.6905, -119.7404
County
Fresno, CA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Malaga BESS LLC | — | — |
| Owner(s) | Malaga BESS LLC | — | — |
| Status | Operating | — | — |
Acid BESS is a 97 MW battery energy storage system located in Fresno County, California. The facility, owned and operated by Malaga BESS LLC, commenced operations in 2025. It consists of a single generator utilizing batteries as its primary fuel source, classified as "MWH" in energy data systems. The battery system has a duration of 1 hour.
The plant operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Acid BESS ranks as the 117th largest power plant in California out of 300, and 520th nationally out of 1205 facilities. The plant has been the subject of 10 news articles, with coverage focusing on industry trends, potential hazards, and regulatory matters.
Generated from EIA, GEM, and public data sources
ISO/RTO
CAISO
Market
ISO/RTO Member
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
−256 MWh
Net Charging
-3.4K MWh
Annual Net Energy
-0.5%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $132.0M
Market Position
ISO/RTO Market
CAISO
LMP Node
—
Pricing Hub
TH_ZP26_GEN-APND
Node Source
Shared substation inference
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about Acid BESSCalifornia Independent System Operator (CISO)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP