How long does ERCOT interconnection take for a data center?

It depends on the path. Large loads (75MW+ aggregate site demand under ERCOT's process and Texas SB6) face a multi-year path to energization — the studies themselves move in months, but network upgrades, agreements, financial security, and transmission construction set the calendar. Distribution-level loads under 75MW move through the serving utility's capacity check, service application, and engineering study, with energization timelines driven mainly by utility construction scope — commonly months to low single-digit years.

What is the ERCOT large load interconnection process?

For large flexible and non-flexible loads, ERCOT and the transmission service provider run screening and planning studies to assess grid impact before the load can connect, with additional requirements layered on by SB6 for 75MW+ single sites, including PUCT-overseen standards and last-resort curtailment (or backup-generation deployment) provisions during firm load shed.

What is distribution-level interconnection?

Connection to the local utility's distribution network (typically at medium voltage) rather than the ERCOT transmission grid. The utility verifies feeder and substation capacity, accepts a service application, performs an engineering study, and builds the service extension — no regional transmission studies required.

Do I need to go through ERCOT directly for a sub-75MW site?

No. While a site's aggregate demand stays under 75MW, its counterparty is the serving distribution utility, which manages its own service process under its tariffs — and determines service voltage. The load participates in the ERCOT market through retail arrangements but does not enter the large-load interconnection process.

What should a buyer verify before trusting a site's interconnection claims?

Written utility capacity confirmation, an accepted service application with a date, the status and scope of the utility engineering study, and PE-stamped interconnection design. Verbal assurances and proximity to a substation are not an interconnection position.

Insights · 04 — Process

ERCOT interconnection, step by step.

Two paths connect a load to the Texas grid. They differ by an order of magnitude in time. Here is each one, stage by stage.

Distribution path

Sub-75MW

1Service application. Load details filed with the distribution utility — not with ERCOT.

2Distribution load study. The utility checks the load against existing feeder and substation capacity.

3Facilities agreement. Scope and cost of any line extension or substation work, committed in writing.

4Construction & metering. Utility builds its side; customer substation is commissioned against it.

5Energization. Meter set, service live. Typically months end to end.

Transmission path

75MW+ large load

1Interconnection request. Filed with the transmission service provider; enters the large-load study process.

2Screening & full studies. Load-flow, stability and facilities studies — sequential, each with its own clock.

3Network upgrades. New lines, breakers or autotransformers the studies require — often years of construction.

4SB6 compliance. Large-load disclosure, last-resort curtailment provisions and cost allocation, layered onto the schedule.

5Energization. Published timelines run 36–60 months for new large loads.

The strategic read

Neither path is wrong — they serve different scales. Gigawatt campuses have no choice but the transmission queue. But for the large middle of the market — AI inference, regional cloud, enterprise compute at 10–70MW — the distribution path delivers the same electrons years sooner. TPDS builds for that segment of the market: sites deliberately sized under the threshold, studied, agreed and energized before a tenant ever signs. Why timing decides deals →

Process summaries are simplified for orientation and vary by utility and load. Not legal or engineering advice; specifics are confirmed in diligence.