IREN's 2GW Sweetwater Hub Earns Base Load Status in ERCOT's Batch Zero Screening

IREN Limited just cleared a meaningful hurdle in the race to plug massive data centers into the Texas power grid. The company’s 2GW Sweetwater Hub has been conditionally classified as Base Load within ERCOT’s Batch Zero interconnection screening process, a designation that treats the project as known demand rather than a speculative request sitting in queue.

For a company building out more than 5 GW of global data center capacity, getting two gigawatts recognized as credible load in the nation’s most energy-hungry grid operator’s system is a substantial win.

ERCOT, the grid operator for most of Texas, is drowning in interconnection requests. Hundreds of gigawatts worth of large-load applications, predominantly from data centers, have piled up as AI infrastructure buildout accelerates across the state.

Batch Zero is ERCOT’s answer to that logjam. Rather than processing applications one by one, the framework groups credible projects together and studies their collective impact on the grid. Projects that earn Base Load classification are essentially acknowledged as real demand, not aspirational filings from developers who may never break ground.

The classification is conditional, though. IREN and every other project in Batch Zero still need to pass further verification steps before the designation becomes permanent.

The Sweetwater Hub sits in West Texas and comprises two projects. Sweetwater 1 accounts for 1,400 MW of capacity, while Sweetwater 2 adds another 600 MW, bringing the combined total to 2 GW.

Sweetwater 1 is already further along than most competing projects. A high-voltage substation at the site was energized on May 1, 2026, unlocking the ability to begin constructing 300 MW of gross data center capacity. That initial phase is expected to come online in Q4 2027.

IREN, listed on NASDAQ under the ticker IREN, has been steadily expanding its global data center development pipeline. The company’s portfolio now exceeds 5 GW in total capacity across multiple geographies, making the Sweetwater Hub’s 2 GW a cornerstone but not the entirety of its strategy.

The company originally built its reputation in Bitcoin mining and high-performance computing before pivoting more aggressively into large-scale data center development.

ERCOT’s Batch Zero process was initiated following the Public Utility Commission of Texas’s approval of revised protocols in June 2026, enabling large electricity consumers to assess grid impact more holistically by evaluating multiple projects simultaneously rather than on a case-by-case basis.

With 300 MW of initial capacity under construction and a Q4 2027 delivery target for Sweetwater 1’s first phase, IREN has set a public benchmark that competitors and investors alike will be watching closely.