ISOs Can't See Some DERs (IMAGE) University of California - Riverside Caption Electric grid managers and utility companies need to find ways to track, measure, and value electricity consumption and production that account for the variability of electricity that comes from decentralized sources, such as solar, wind, and batteries. Credit UC Riverside Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.