The blackouts, which have left as many as 4 million Texans trapped in the cold, show the numerous chilling consequences of putting too many eggs in the renewable basket.Yet these operational errors overshadow the decades of policy blunders that made these blackouts inevitable. Thanks to market-distorting policies that favor and subsidize wind and solar energy, Texas has added more than 20,000 megawatts (MW) of those intermittent resources since 2015 while barely adding any natural gas and retiring significant coal generation.

On the whole, Texas is losing reliable generation and counting solely on wind and solar to keep up with its growing electricity demand. I wrote last summer about how ERCOT was failing to account for the increasing likelihood that an event combining record demand with low wind and solar generation would lead to blackouts. The only surprise was that such a situation occurred during a rare winter freeze and not during the predictable Texas summer heat waves.

Yet ERCOT still should not have been surprised by this event, as its own long-term forecasts indicated it was possible, even in the winter. Although many wind turbines did freeze and total wind generation was at 2 percent of installed capacity Monday night, overall wind production at the time the blackouts began was roughly in line with ERCOT forecasts from the previous week.

We knew solar would not produce anything during the night, when demand was peaking. Intermittency is not a technical problem but a fundamental reality when trying to generate electricity from wind and solar. This is a known and predictable problem, but Texas regulators fooled themselves into thinking that the risk of such low wind and solar production at the time it was needed most was not significant.