ERCOT Chief Seeks Power to Curb Data Centers Before Grid Emergencies

Texas grid chief Pablo Vegas will ask the state legislature for authority to order data centers to cut power use before a grid emergency is even declared. The move would pull mandatory curtailment earlier into the state's three-stage emergency process, when scarcity first appears rather than when the system is already strained.

Vegas, chief executive officer of the Electric Reliability Council of Texas (ERCOT), laid out the plan Wednesday at the BloombergNEF Summit in Houston. Under current rules, Texas must reach level two of a three-alarm power emergency before it can request that data centers reduce demand. Vegas wants that trigger moved to level one, or earlier still.

Why does ERCOT want earlier curtailment?

The answer is operational mechanics. Ramping down facilities that draw as much power as data centers do takes time and coordination, so waiting until level two leaves grid operators with too little room to maneuver. Vegas argued the trigger needs to move up the timeline.

"The practical realities of curtailing large amounts of customers like data centers and managing that from an operational point of view really requires us to think about pulling that up a little bit earlier into the process," Vegas said. "We really don't want to impact residential and everyday businesses if we get into a scarcity event in the state."

In plain terms, the state would rather darken a few server floors than any homes. A data center curtailed early is a controlled lever. A rolling blackout is not.

What does Senate Bill 6 already require?

Texas passed Senate Bill 6 in 2025. The law requires large-load customers, particularly data centers, to reduce power use with 24 hours notice. That structure set the legal foundation for negotiated curtailment, but it ties the mandate to a late-stage emergency threshold.

Vegas's proposal would modify those requirements through the legislature. Asked whether data centers support the change, he said everyone he has talked to wants the electrical system to work.

"The hyperscalers are on board with integrating into the system and into the community in a way that works for all of the communities and all the participants in the system," he said. "If the legislature agrees and thinks it makes sense to modify those requirements, then we can work with them on that as well."

Has ERCOT actually ordered a curtailment?

Not yet. ERCOT has never invoked SB6 to order data centers to curtail. The record so far is voluntary. Vegas said facilities did reduce power demand on their own during extreme weather this past winter.

Supply for the coming winter looks manageable by his account. Data centers have access to power supply in the low single-digit-gigawatt range for that period, according to Vegas.

What happens next?

The proposal now sits with Texas lawmakers. If the legislature agrees, ERCOT gains a pre-emergency lever over the state's fastest-growing class of power users, and the burden of scarcity shifts further toward facilities that can absorb it.

The stakes scale with the load. Texas has become a magnet for hyperscale data center construction, and every new facility adds demand that ERCOT must balance against generation capacity during heat waves and winter storms alike. A curtailment framework that triggers at level one gives operators hours of additional warning and gives the grid a buffer it currently lacks.

For data center operators, earlier curtailment means planning for downtime they accepted in principle under SB6 but have never yet been forced to take. For residents and small businesses, it means the state is designing the system so their lights stay on when supply runs short.