Smart inverters let solar panels and batteries participate in grid services, and power electronics govern the flow, conversion, and quality of electricity with far greater precision. The distribution grid is now where rooftop solar, batteries, electric vehicles, heat pumps, smart buildings, and flexible loads connect. A more modular grid is not a fully unbundled grid; modularity and integration are not opposites. Innovation SpotlightAs solar and other newer power sources replace conventional mechanical power plants, the grid loses some of the built-in stability once provided by large spinning turbines. With the right controls, they can also help keep a more technologically heterogeneous power system steady and reliable.