Solar Array (IMAGE) DOE/Pacific Northwest National Laboratory Caption Battery storage at Pacific Northwest National Laboratory’s solar array. Batteries are a critical component of microgrids, which also often include backup generators to withstand emergency outages during a broad range of weather conditions. Credit Photo by Andrea Starr | Pacific Northwest National Laboratory Usage Restrictions None License Original 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.