In Tom Green County, Texas (TX). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

200 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

EIA-860M names Deriva Energy as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Rambler LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Deriva Energy here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Rambler LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Rambler still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Rambler

Rambler is a 200 MW solar farm in Tom Green County, Texas, operated by Deriva Energy. EIA-860M lists 1 generating unit here, inside ERCOT. Its unit entered service in 2020.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 200 MW; 200 MW net summer
Generating units: 1
In service: 2020
EIA plant ID: 62141

Where it is

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County: Tom Green County, Texas
Coordinates: 31.517, -100.6
Balancing authority: ERCO
Sector: IPP Non-CHP

Units, technology and status

Operator of record: Deriva Energy
Primary energy source: Solar
Technologies: Solar Photovoltaic
Status: Operating

Every plant Deriva Energy reports to EIA →

Rambler: FAQ

Where is Rambler?: In Tom Green County, Texas (TX). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Rambler?: 200 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Rambler?: EIA-860M names Deriva Energy as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Rambler LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Deriva Energy here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Rambler LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Rambler still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.