Black Walnut Energy Storage LLC
Black Walnut Energy Storage LLC is a 15 MW battery storage project in Ventura County, California, operated by Black Walnut Energy Storage LLC. EIA-860M lists 1 generating unit here, inside CAISO. Its unit entered service in 2025.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 15 MW
- 15 MW net summer
- Generating units
- 1
- In service
- 2025
- EIA plant ID
- 65396
Where it is
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- County
- Ventura County, California
- Coordinates
- 34.3576, -119.0573
- Balancing authority
- CISO
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Black Walnut Energy Storage LLC
- Primary energy source
- Battery
- Technologies
- Batteries
- Status
- Operating
Every plant Black Walnut Energy Storage LLC reports to EIA →
Black Walnut Energy Storage LLC: FAQ
- Where is Black Walnut Energy Storage LLC?
- In Ventura County, California (CA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Black Walnut Energy Storage LLC?
- 15 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Black Walnut Energy Storage LLC?
- EIA-860M names Black Walnut Energy Storage LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is Black Walnut Energy Storage LLC still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.