The CERTS Microgrid Concept represents an innovative approach to controlling the electrical operation of the energy sources and loads within a microgrid while minimizing the need for communication among them in order to establish and maintain the electrical requirements for safe. The CERTS Microgrid Concept represents an innovative approach to controlling the electrical operation of the energy sources and loads within a microgrid while minimizing the need for communication among them in order to establish and maintain the electrical requirements for safe. Authorized by Section 40101(d) of the Bipartisan Infrastructure Law (BIL), the Grid Resilience State and Tribal Formula Grants program is designed to strengthen and modernize America's power grid against wildfires, extreme weather, and other natural disasters that are exacerbated by the climate. • REopt is a technoeconomic model used to optimize Distributed Energy Resources (DER) sizing and dispatch based on the site's energy needs and goals. • Provides least cost solution subject to resilience. REopt considers the tradeoff between ownership costs and savings across multiple value. ional grid (or macrogrid). It consists of small modular distributed generators, energy storage systems, and low-voltage loads connected to the main traditional grid at th point of common coupling. This article aims to provide an overview of microgrid fundamentals: what a microgrid is and what a microgrid can do.