Renewable energy is now a critical factor in every country’s energy development, and countries around the world are planning, building, and incorporating greater amounts of wind, solar, hydro, storage, and geothermal capacity into their energy mix every year. The challenges to renewables from transmission, seasonal storage, grid flexibility, demand response, and digitization (among others) are substantial, but the benefits from zero-cost inputs, clean air, and energy security continue to drive this change. As renewable energy uptake rises, it will be crucial to monitor high-growth areas of expansion, like offshore wind and distributed systems, full-cost factors of incorporation like storage and smarter grids, as well as the flexibility and efficiency of consumers to shape demand and smooth peak load. IEEFA’s research of renewables takes a holistic approach to the technologies, economics, and policies of the energy transition across sectors and geographies.