Electrical grid transmission lines (IMAGE) DOE/Pacific Northwest National Laboratory Caption New flow battery technologies are needed to help modernize the U.S. electric grid and provide a pathway for energy from renewable sources such as wind and solar power to be stored. Credit Andrea Starr | Pacific Northwest National Laboratory Usage Restrictions No restrictions. License Public Domain 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.