This fact sheet provides an overview of microgrids—groups of interconnected loads and distributed energy resources (DERs) within clearly defined electrical boundaries that act as a single controllable entity with respect to the grid. The rate of microgrid installations is increasing, with approximately 458 microgrids currently in operation and more than 225 planned microgrids expected to come online between 2021 and 2023. Combined Heat and Power (CHP) can play a central role in microgrids by providing energy resilience and ensuring continuous operation for critical loads at connected buildings, campuses, and communities in the event of grid outages.