Charolais Storage
150 MW storage in Matagorda, TX · In queue since February 2021 · Proposed COD December 2026
150 MW
Capacity
1
Components
Battery
5y 3m
In Queue
Facility Study
IA Status
COD target: 2026
Total Duration
5y 10m
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: 2026-12-15
The Charolais Storage project is a proposed 150 MW battery energy storage system in Matagorda County, Texas. Developed by RWE Solar Development, LLC, the project is interconnected within the Electric Reliability Council of Texas (ERCOT) queue as entry ERCOT-23INR0168, filed on February 9, 2021. The proposed commercial operation date is December 15, 2026.
The project's interconnection status is currently in the Facility Study phase. The point of interconnection is at the tap 345kV 44000 W A Parish - 5915 STP. The Charolais Storage project has appeared in recent news coverage regarding energy storage developments in Texas.
Generated from interconnection queue and public data sources
State
TX
County
Matagorda
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
RWE Solar Development, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
tap 345kV 44000 W A Parish - 5915 STP
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- 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.
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