BOTTLE ROCK POWER
56.882 MW hybrid in Lake, CA · In queue since September 2005 · Proposed COD November 2027
56.882 MW
Capacity
2
Components
Geothermal + Battery
20y 8m
In Queue
IA Executed
IA Status
Signed Nov 2006
Queue → IA
1y 2m
IA → COD
21 years
Total Duration
1y 2m
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2027-11-30
The proposed BOTTLE ROCK POWER project is a 56.88 MW hybrid geothermal and battery energy storage system located in Lake County, California. The project, developed under the CAISO queue as queue ID CAISO-81, consists of a 9.44 MW geothermal component and a 47.45 MW battery component. The project is interconnected to the PG&E utility via the Geysers #17-Fulton 230 kV Line.
The project entered the CAISO interconnection queue on September 13, 2005, and has a proposed commercial operation date of November 30, 2027. An Interconnection Agreement (IA) was executed on November 16, 2006. The BOTTLE ROCK POWER project has been mentioned in recent news coverage.
Generated from interconnection queue and public data sources
State
CA
County
Lake
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
Geysers #17-Fulton 230 kV Line
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_ZP26_GEN-APND
- Hub Confidence
- LOW
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-26
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