Prost ESS
202.7 MW storage in Austin, TX · In queue since February 2024 · Proposed COD September 2028
202.7 MW
Capacity
1
Components
Battery
2y 3m
In Queue
Facility Study
IA Status
COD target: 2028
Total Duration
4y 7m
Interconnection request submitted to ISO/RTO
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2028-09-08
The Prost ESS project is a proposed 202.7 MW battery storage project located in Austin County, Texas. Developed by Prost ESS LLC, the project is currently active in the ERCOT interconnection queue as entry ERCOT-26INR0410, with a queue entry date of February 27, 2024. The proposed commercial operation date is September 8, 2028, and the project's interconnection agreement status is currently in the Facility Study phase.
The Prost ESS project is linked to an existing operating plant, Prost ESS (EIA ID 68360). Recent news coverage has discussed the development project.
Generated from interconnection queue and public data sources
State
TX
County
Austin
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Prost ESS LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 138kV L_PISEK_8_1Y (#7296) - L_WELCOM8_1Y(#7577)
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_SOUTH
- Hub Confidence
- LOW
- POI Substation
- Pisek Substation
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.
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