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BATTERY STORAGE · ERCOTSigma Storage
Sigma Storage is a 408 MW battery storage request in interconnection study in the ERCOT interconnection queue, in Harris County, Texas.
Queue statusIn planning
- PlanningQueued May 2021 (current stage)
- Consented (not yet reached)
- Construction (not yet reached)
- OperatingTarget Oct 2029 (not yet reached)
- Closed (not yet reached)
Studies assess what grid upgrades the project would need and who pays for them. A signed interconnection agreement is the main step before construction.
Request details
- Queue ID
- 23INR0126
- Grid region
- ERCOT (Texas)
- Developer
- AES Distributed Energy, Inc
- Connection point (POI)
- 40460 Deepwater 138kV
- Location
- Harris County, Texas
- Technology
- Battery: 408 MW
- Total requested
- 408 MW
- Study phase
- SS Completed, FIS Started, No IA
- Queue status
- Active
- Entered queue
- 11 May 2021
- Proposed online date
- October 2029
Location
Marker shows the centre of Harris County; the queue data does not give exact sites.
Other requests in Harris County
- Elmax Power StationGas · 519 MW · agreement signed
- NRG THW GT 345 (Tef)Gas · 456 MW · agreement signed
- NRG Greens Bayou 6 (TEF-Due Diligence)Gas · 445 MW · agreement signed
- Rhapsody StorageBattery storage · 206 MW · agreement signed
- Callisto II Energy CenterBattery storage · 203 MW · agreement signed
- Brookview Road BESSBattery storage · 203 MW · agreement signed
- Houston IV BESSBattery storage · 165 MW · agreement signed
- Dori BQ BESSSolar + storage · 154 MW · agreement signed
- Friendswood Energy GencoGas · 144 MW · agreement signed
- Remy Jade III Power StationGas · 102 MW · agreement signed
- Pamela Heights IBattery storage · 102 MW · agreement signed
- Megamouth Energy StorageBattery storage · 101 MW · agreement signed
Source: Lawrence Berkeley National Laboratory, Queued Up, data through end of 2025, compiled from ISO/RTO and utility queues. Check the grid operator's own queue for the latest status. Report a problem