PJM and ERCOT Large Load Interconnection Map

The map plots the large load interconnection queue on transmission lines and substations across PJM, ERCOT, and NYISO, from 115 kV to 765 kV.

Related large load interconnection pages

• Data center interconnection queue
• Large load forecast to 2035
• Flexible data center load
• Substation capacity
• ISO load zones
• Energization probability model
• Monthly market reports
• Sources and methods

Frequently asked questions

What is a large load interconnection request?

A request by a large electricity customer, such as a data center, semiconductor fab or hydrogen plant, to connect new demand to the transmission grid, usually 20 MW or more.

Which grids does the Large Load Monitor cover?

PJM, ERCOT and NYISO today, covering 1,100+ requests and 260+ GW, with MISO, ISO-NE, CAISO and SPP planned.

How is energization probability estimated?

An interpretable model scores each request on study stage, substation headroom, site control and regulatory signals, then weights MW by probability and expected timing.