Larkspur Energy Storage
307.46 MW storage in Upton, TX · In queue since August 2021 · Proposed COD May 2027
307.46 MW
Capacity
1
Components
Battery
4y 9m
In Queue
IA Executed
IA Status
Signed Feb 2022
Queue → IA
6 months
IA → COD
5y 3m
Total Duration
6 months
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 executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2027-05-05
Larkspur Energy Storage is a proposed 307.46 MW battery storage project located in Upton County, Texas. The project, developed by Larkspur Energy Storage LLC, is currently active in the ERCOT interconnection queue as entry ERCOT-23INR0340, with a queue entry date of August 2, 2021. The proposed commercial operation date is May 5, 2027.
The project has an executed Interconnection Agreement (IA), dated February 28, 2022. The point of interconnection (POI) is the 71213 Benedum 138kV substation. The project has appeared in recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Upton
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Larkspur Energy Storage LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
71213 Benedum 138kV
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.
