All industries › Battery storage › Texas › Sigma Storage
Battery storage · Harris County, Texas
Sigma Storage
A 408 MW battery storage project in Harris County, Texas. Sigma Storage has work under way on site. Public records name AES Distributed Energy as its developer. No public record read so far names its builder.
The record
What the public record says about Sigma Storage, as of 22 Oct 2026.
| Stage | Under construction |
|---|---|
| Construction start | Q2 2028 estimate |
| Size | 408 MW |
| Location | Harris County, Texas (to about 10 km) |
| Developer | AES Distributed Energy |
| Grid operator | ERCOT |
| Builder (EPC) | Not named yet |
| Trade subcontractors | in the app |
| People to call | in the app |
| Phase windows | in the app |
Every fact in the app links to the public record behind it, with how many records agree and whether it is confirmed, reported or an estimate. What the terms mean.
What happened
Each change dated by the scene or the document, newest first.
No change on record since Groundtrace started tracking it.
Who was named on it, and when, is in the app.
Also developed by AES Distributed Energy
| Project | Stage | Size |
|---|---|---|
| Beacon StorageBattery storage · Harris County, Texas | Under construction | 409 MW |
| Glen Canyon Solar AUtility solar · Kane County, Utah | Under construction | 95 MW |
| AES Waiawa Phase 2 SolarUtility solar · Honolulu County, Hawaii | Under construction | 30 MW |
| AES Mountain View SolarUtility solar · Honolulu County, Hawaii | Under construction | 7 MW |
| Pleinmont Solar 2Utility solar · Spotsylvania County, Virginia | Operating | 240 MW |
| Buffalo Gap 2 Wind FarmOnshore wind · Nolan County, Texas | Operating | 232 MW |
Also in Harris County
| Project | Stage | Size |
|---|---|---|
| Beacon StorageBattery storage | Under construction | 409 MW |
| Callisto II Energy CenterBattery storage | Under construction | 203 MW |
| Kegans BESS (Houston IV BESS)Battery storage | Under construction | 165 MW |
| Pamela Heights IBattery storage | Under construction | 102 MW |
| BRIDGELAND PV SEC 36Utility solar | Under construction | 53 acres |
| CyrusOne Houston Phase IIData centers | Under construction | 33 acres |
More
Questions
Sigma Storage, in short.
Where is Sigma Storage?
Sigma Storage is a 408 MW battery storage project in Harris County, Texas, in ERCOT's interconnection queue. The public page places it to within about ten kilometres; the precise location is in the subscriber record.
When does construction start on Sigma Storage?
Groundtrace estimates construction started in the second quarter of 2028. This is an estimate from the project's filings, not a date any record states; the exact date and the record behind it are in the subscriber record.
Who is developing Sigma Storage?
AES Distributed Energy, as the public record names it.
Who is building Sigma Storage?
No public record read so far names a builder for Sigma Storage. Groundtrace leaves the field empty rather than guess, and fills it when a permit, a filing or the builder's own page names one.
Pricing
Free to explore. Subscribe for the full record.
Usage-based, no seats, cancel any time. Pay for what your team and your assistant actually use.
Explore
Free
- The map, by state and industry
- The next projects to break ground, per state
- A page per project, developer and grid operator
- The glossary and guides
Team
From $750 per month2,000 records included, then $0.25 per record. Month to month.
- Every project in development, with timelines
- Builders, developers and trade subcontractors
- Work contacts
- App, API and MCP server
Enterprise
Custom
- Everything in Team
- Watchlists and alerts
- New states and industries on request
- Dedicated support
Request access
Tell us what you sell. We answer within a working day.
Write to hello@groundtrace.io with your name, your company and what you sell, and we set up your access.