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Battery storage · Harris County, Texas
Callisto II Energy Center
A 203 MW battery storage project in Harris County, Texas. Callisto II Energy Center has work under way on site. Public records name Callisto II Energy Center LLC as its developer. No public record read so far names its builder.
The record
What the public record says about Callisto II Energy Center, as of 22 Oct 2026.
| Stage | Under construction |
|---|---|
| Construction start | Q1 2026 permit on file |
| Size | 203 MW |
| Location | Harris County, Texas (to about 10 km) |
| Developer | Callisto II Energy Center LLC |
| 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 in Harris County
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|---|---|---|
| Beacon StorageBattery storage | Under construction | 409 MW |
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| 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
Callisto II Energy Center, in short.
Where is Callisto II Energy Center?
Callisto II Energy Center is a 203 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 Callisto II Energy Center?
A construction permit on file dates the start of work to the first quarter of 2026.
Who is developing Callisto II Energy Center?
Callisto II Energy Center LLC, as the public record names it.
Who is building Callisto II Energy Center?
No public record read so far names a builder for Callisto II Energy Center. Groundtrace leaves the field empty rather than guess, and fills it when a permit, a filing or the builder's own page names one.
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