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Utility solar · Pinal County, Arizona
THREE SISTERS Solar Generation and BESS
A 300 MW utility solar project in Pinal County, Arizona. THREE SISTERS Solar Generation and BESS has asked to connect to the grid or filed for its first approvals; nothing on record yet commits money to it. Public records name THSI bn, LLC as its developer. No public record read so far names its builder.
The record
What the public record says about THREE SISTERS Solar Generation and BESS, as of 23 Oct 2026.
| Stage | Queued |
|---|---|
| Construction start | Q3 2027 estimate |
| Size | 300 MW |
| Location | Pinal County, Arizona (to about 10 km) |
| Developer | THSI bn, LLC |
| Grid operator | — |
| 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 Pinal County
| Project | Stage | Size |
|---|---|---|
| Valley Farms Energy CenterBattery storage | Under construction | 400 MW |
| Selma Energy CenterUtility solar | Under construction | 125 MW |
| Kitt SolarUtility solar | Under construction | 100 MW |
| APS request Q295Utility solar | Financed | 250 MW |
| APS request Q264Utility solar | Financed | 130 MW |
| APS request Q254Utility solar | Financed | 100 MW |
More
Questions
THREE SISTERS Solar Generation and BESS, in short.
Where is THREE SISTERS Solar Generation and BESS?
THREE SISTERS Solar Generation and BESS is a 300 MW utility solar project in Pinal County, Arizona. The public page places it to within about ten kilometres; the precise location is in the subscriber record.
When does construction start on THREE SISTERS Solar Generation and BESS?
Groundtrace estimates construction starts in the third quarter of 2027. 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 THREE SISTERS Solar Generation and BESS?
THSI bn, LLC, as the public record names it.
Who is building THREE SISTERS Solar Generation and BESS?
No public record read so far names a builder for THREE SISTERS Solar Generation and BESS. 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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