An independent market monitor says ERCOT, the Texas grid operator,  left wholesale electricity prices at the legal maximum for two days longer than necessary, and overcharged power companies $16 billion in the process during the winter storm that caused massive grid and gas system failures and left more than 4 million Texans without electricity. Potomac Economics, the firm hired by the state  to assess ERCOT’s performance, recommended to regulators that the charges be reversed ts. The move could help alleviate stress on Texas power providers facing shortfalls, default, or bankruptcy following the massive price spikes.

The “error” and potential reversal could also have major implications for the Texas wind energy industry. Due to the nature of the financial instruments used by Texas wind firms, those that were unable to produce power during the storm were forced to pay the legal maximum of $9,000 per megawatt hour (the average price in 2020 was $22.18) for four days. At that rate, wind companies could be forced into bankruptcy, owing their counterparties more than their entire wind farm is worth. (ERCOT error: Bloomberg $, Texas Tribune, The Hill, FT $, Politico Pro $; Power companies: Reuters; Wind industry: Wall Street Journal $; Climate Signals background: February 2021 polar vortex breakdown and central US winter storms