All industries › Battery storage › California › SE Athos II
Battery storage · Riverside County, California
SE Athos II
A 402 MW battery storage project in Riverside County, California. SE Athos II has work under way on site. Public records name SE Athos II, LLC as its developer. No public record read so far names its builder.
The record
What the public record says about SE Athos II, as of 23 Oct 2026.
| Stage | Under construction |
|---|---|
| Construction start | Q4 2025 estimate |
| Size | 402 MW |
| Location | Riverside County, California (to about 10 km) |
| Developer | SE Athos II, 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 developed by SE Athos II, LLC
| Project | Stage | Size |
|---|---|---|
| SE Athos IIUtility solar · Riverside County, California | Operating | 200 MW |
Also in Riverside County
| Project | Stage | Size |
|---|---|---|
| GRACE ENERGY CENTERUtility solar | Under construction | 509 MW |
| ATHOS POWER PLANTUtility solar | Under construction | 450 MW |
| EASLEYUtility solar | Under construction | 290 MW |
| COBALTUtility solar | Under construction | 256 MW |
| DOUBLE BUTTE STORAGEBattery storage | Financed | 508 MW |
| OBERONUtility solar | Financed | 500 MW |
More
Questions
SE Athos II, in short.
Where is SE Athos II?
SE Athos II is a 402 MW battery storage project in Riverside County, California. The public page places it to within about ten kilometres; the precise location is in the subscriber record.
When does construction start on SE Athos II?
Groundtrace estimates construction started in the fourth quarter of 2025. 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 SE Athos II?
SE Athos II, LLC, as the public record names it.
Who is building SE Athos II?
No public record read so far names a builder for SE Athos II. 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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