Short answer on the Amazon off-grid data center: Amazon is planning what the market-intelligence firm Cleanview described as its first major off-grid data center investment, at the GW Ranch site in Pecos County, West Texas. The site’s initial design relies on dedicated on-site gas generation developed by Pacifico Energy, though Amazon says it may transition to grid-connected service as interconnection timelines allow. Pacifico markets the permitted generation envelope as up to 7.65 GW; the TCEQ technical review describes 5,000 MW of nominal output. The permit filing lists 35 turbines, and only 21 of them have a named model. The undecided 14 are the detail worth watching.
The story surfaced in early August 2026, when Cleanview traced three newly filed data center construction permits to the GW Ranch site, which Amazon confirmed acquiring. Amazon said the campus “is powered by new on-site generation that won’t raise electricity costs for Texas families.” Satellite imagery from late July already shows land clearing underway. The roles are distinct: Pacifico Energy develops the generation project, and Amazon acquired the site and plans to take the power.
What off-grid means here, and what it does not
A conventional data center connects to the public grid and waits in an interconnection queue, which in ERCOT and most US markets now stretches years. The GW Ranch design starts from dedicated on-site generation instead: under the permitted configuration, the plant cannot sell power to or receive power from the local utility system. That is narrower than “off-grid forever.” Behind-the-meter plants can be grid-connected, and Amazon has indicated the campus may transition to grid-connected service as interconnection timelines allow.
The practical consequence is speed: the project’s critical path shifts away from grid interconnection and toward equipment delivery and construction. On electricity costs, Amazon says the design will avoid raising rates for Texas families; that is the company’s claim, and it has not yet been independently demonstrated.
The site is not gas-only. Alongside the permitted gas capacity, reporting describes 1.8 GW of battery storage and 750 MWac of solar, with more than 5 GW of commercial capacity targeted by 2031.
The turbine list: 21 named, 14 undecided
This is the detail most coverage skipped, and it comes from the Texas Commission on Environmental Quality’s technical review of the project’s air permit (permit numbers 181033, PSDTX1672 and GHGPSDTX255).
| Slot | Count | Status in the permit filing |
|---|---|---|
| Siemens SGT-800 (mid-size) | 21 | Named |
| Large-frame H/J-class | 14 | Model to be selected from four allowable options |
The four allowable large-frame options are Doosan Enerbility’s DGT6-300H S2, GE Vernova’s 7HA.03, Mitsubishi Power’s M501JAC, and Siemens Energy’s SGT6-9000HL. The permit names these as allowable configurations; it does not establish active bidding, contract negotiations, or a final commercial award, and a permit filing is not a purchase contract. Pacifico said in January 2026 that the project’s turbines were secured, but it did not identify the suppliers or contract terms for the 14 large-frame units. The large-gas-turbine market is supply-constrained industry-wide, although availability differs by manufacturer and delivery slot. Which models end up on the pad is the clearest project-specific disclosure still to come.
Why this project is worth a reference page
The thesis in our earlier power-infrastructure coverage is that electricity, not chips, is the binding constraint on AI buildout. GW Ranch shows one answer to that constraint: pursue dedicated on-site generation rather than waiting solely for grid interconnection. It is one of several dedicated-generation data center projects now moving in the US, and among the largest by permitted envelope.
The risks are equally concrete. The TCEQ permit allows up to 33.2 million U.S. short tons of CO2e per year, equivalent to about 30.1 million metric tons. That is a potential-to-emit ceiling, not a forecast or a measured result; for scale, the highest-emitting U.S. power plant in the 2024 GHGRP data reported about 19.0 million metric tons. The permitted units are simple-cycle turbines, faster to deploy but less fuel-efficient than combined-cycle plants, so the project’s operating economics would be sensitive to delivered gas costs. And the schedule is a developer target, not a customer commitment.
What to watch next
- The large-frame turbine selection. A disclosed model choice or order among the four allowable options is the clearest project-specific disclosure still to come.
- Whether first power arrives on Pacifico’s stated schedule. The developer’s current project page targets Q1 2027; its January 2026 release used the broader first half of 2027.
- Any permit amendments, regulatory challenges, or grid-interconnection filings. The emissions envelope and the possible later grid connection are both paper trails worth following.
- How other hyperscaler dedicated-generation campuses progress. GW Ranch is a large data point in a pattern, not the only one.
Scope and date
Figures above come from the TCEQ technical review of permits 181033/PSDTX1672/GHGPSDTX255 (January 2026), Pacifico Energy’s announcements and project page, Amazon’s public statement, and reporting by Cleanview and Data Center Dynamics in early August 2026. The turbine configuration reflects the permit filing, not announced purchase contracts. Amazon has not disclosed its investment amount or a data center operations date, and we do not estimate either.
We track the power-constraint thesis in utility stocks and data center electricity demand, and covered the gas-turbine order books in GE Vernova vs Siemens Energy.
Frequently asked questions
What is the Amazon off-grid data center in Pecos County?
It is a planned AI data center campus at the GW Ranch site in Pecos County, West Texas, which Amazon confirmed acquiring. The initial design relies on dedicated on-site generation developed by Pacifico Energy, with reported battery and solar capacity alongside; Amazon has indicated the campus may later transition to grid-connected service.
How big is the GW Ranch power project?
Pacifico Energy markets the permitted generation envelope as up to 7.65 GW. The TCEQ technical review describes 5,000 MW of nominal output across 35 simple-cycle gas turbines, and Pacifico’s commercial plan targets more than 5 GW by 2031.
Who supplies the turbines for the project?
Per the permit filing, 21 units are Siemens SGT-800s. The remaining 14 large-frame units are to be selected from four allowable options: Doosan Enerbility, GE Vernova, Mitsubishi Power, and Siemens Energy models. The permit does not establish bidding or a commercial award, and no purchase contracts have been announced.
Why start off-grid instead of using ERCOT?
Grid interconnection queues take years. Under the permitted configuration the plant cannot sell power to or receive power from the local utility system, which trades the interconnection wait for construction risk. Amazon has indicated a possible later transition to grid-connected service.
When will the Amazon Pecos data center come online?
Amazon has not announced a date for data center operations. Pacifico’s current project page targets first power in Q1 2027, while its January 2026 release used the broader first-half-2027 window. That is a developer schedule for the generation project, not Amazon guidance.
Is the project controversial?
The air permit allows up to 33.2 million U.S. short tons of CO2e per year, equivalent to about 30.1 million metric tons, a potential-to-emit ceiling rather than a forecast. For scale, the highest-emitting U.S. power plant in the 2024 GHGRP data reported about 19.0 million metric tons, and the gap has drawn scrutiny to the project.
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Sources: TCEQ technical review, permits 181033/PSDTX1672/GHGPSDTX255 ยท Pacifico Energy permit announcement ยท Pacifico Energy GW Ranch project page ยท Cleanview’s original identification ยท Data Center Dynamics on the site acquisition ยท The Verge on Amazon’s statement and the emissions record ยท Environmental Integrity Project, 2024 facility-level GHG data. Last verified: 2026-08-11. Next review: on the large-frame turbine selection or first-power news.
