San Diego – While California draws nearly one third of its power from renewables, solar and wind energy systems are periodically pulled offline because there’s not enough demand when the wind is blowing and the sun is shining. These so-called “curtailments” increased significantly between 2014 (when they were almost non-existent) and today. They could soon become a major barrier to a more sustainable future as more and more renewable energy sources are developed to meet peak demands.

Thankfully, California water agencies are well-positioned to play a pivotal role with a solution that makes the state’s electrical grid more flexible, stable and efficient. Strategic deployment of large-scale, long-duration pumped storage facilities could minimize curtailments and provide many other benefits. That would help California achieve its aggressive targets to supply at least 60 percent of the state’s energy from renewables by 2030 and 100 percent from clean energy sources by 2045.