If you browse a few of the ISO pages for other states/regions you'll see a bunch that have excess capacity above their projected peak for the day. Here's one:

If you browse a few of the ISO pages for other states/regions you'll see a bunch that have excess capacity above their projected peak for the day. Here's one: https://www.iso-ne.com/ https://www.iso-ne.com/ Here's another: http://www.caiso.com/TodaysOutlook/Pages/default.aspx http://www.caiso.com/TodaysOutlook/Pages/default.aspx But there's a limited capacity for Texas to bring in power over just 5 connections, combined with their choice that makes conversion to something compatible with the Texas grid much less efficient. By isolating & not focusing on compatibility they have made it very difficult to have more robust redundancy in their grid.