Sierra Diablo Energy Storage
203.81 MW storage in Van Zandt, TX · In queue since August 2022 · Proposed COD April 2026
203.81 MW
Capacity
1
Components
Battery
3y 9m
In Queue
Facility Study
IA Status
COD target: 2026
Total Duration
3y 8m
Schedule
0 months past proposed COD
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: 2026-04-20
Sierra Diablo Energy Storage is a proposed 203.81 MW battery storage project located in Van Zandt County, Texas. The developer is Sierra Diablo Energy Storage LLC. This project is currently active in the ERCOT interconnection queue as entry ERCOT-24INR0417, with a queue entry date of August 5, 2022, and a proposed commercial operation date of April 20, 2026. Its interconnection status is currently in the Facility Study phase.
The proposed project consists of 203.81 MW of battery storage capacity. Sierra Diablo Energy Storage has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Van Zandt
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
SIERRA DIABLO ENERGY STORAGE LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Tap 138kv 1698 Sulphur Springs Switch _x0013_ 3174 Canton Switch
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.
Last updated 2026-03-26
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