J-BoxPlain answer. In ERCOT, a data center connects through the local transmission service provider's large load interconnection process, which studies the project, places it in a queue and sets conditions before energization. Texas legislation passed in 2025 added requirements for large loads that affect disclosure, curtailment and timelines.
Who does what
The Texas grid has more moving parts than most, and the names get used loosely. For a landowner, three roles matter.
| Party | Role in a large load connection |
|---|---|
| ERCOT | The grid operator. Sets the protocols for large load interconnection, runs the studies at the system level and manages reliability, including emergency curtailment. |
| Transmission service provider (TSP) | The utility that owns the wires and substations in your area. Receives the load inquiry, performs the local study, builds the facilities and connects you. |
| Retail electric provider or competitive supplier | In competitive areas, the entity that sells you the energy. Separate from the wires. |
Outside ERCOT, in parts of the Panhandle and East Texas, different operators and rules apply. Confirm which grid your parcel sits on before anything else.
The large load process, step by step
The exact forms and thresholds live in ERCOT's protocols and the TSP's procedures and should be read there. The shape of the process is consistent.
- Load inquiry. The project submits a request to the TSP describing the load, the location and the timeline.
- Screening and study. The TSP and ERCOT study whether the system can serve the load and what upgrades are required.
- Queue position. Large loads above the threshold defined in ERCOT's process are tracked in a queue and worked in order.
- Agreements. The project and the TSP execute agreements covering scope, cost responsibility and schedule.
- Construction and energization. The TSP builds the facilities; the project builds its side; energization follows testing.
Each step has its own timeline. The study and queue stages are where most of the calendar goes.
What changed in Texas in 2025
Texas Senate Bill 6, signed in 2025, added requirements for large loads connecting in ERCOT. At a general level, and subject to the rules the PUCT and ERCOT adopted to implement it:
- Large loads above a size threshold set in the law face new disclosure requirements, including information about on site backup generation.
- ERCOT gained clearer authority to direct curtailment of large loads during firm load shed emergencies, with provisions for loads that can switch to backup generation.
- Interconnection requests carry study fees and financial commitments intended to clear speculative projects from the queue.
- Co location of large loads with generation received specific treatment.
For a landowner, the practical effect is that the projects that reach the front of the queue are the ones with real capital and real intent behind them. That is good news for a site that has both.
Behind the meter and gas to power
Texas has a lot of natural gas and a lot of stranded or curtailed generation. Projects increasingly pair a utility path with on site generation, either as a bridge while the TSP builds facilities or as a permanent resilience layer. Each option carries its own permitting, air quality, fuel supply and tenant acceptance questions. None of them remove the need to understand the utility path; they change what the path has to deliver and when.
What a landowner can do before engaging a developer
- Confirm which grid and which TSP serve the parcel.
- Identify the nearest substations and ask the TSP whether a load inquiry for the parcel is worth submitting.
- Document any gas, generation or interconnection rights attached to the land.
- Do not sign exclusivity with anyone who cannot explain the steps above for your specific parcel.
Questions & answers.
ERCOT's large load interconnection process applies above a megawatt threshold defined in its protocols, and Texas SB 6 set its own threshold for the new requirements. Confirm the current figures with ERCOT and the PUCT.