A new geopolitical and energy market reality has accelerated momentum for the green transition. But there is one geography for which energy is a perennial challenge: islands. Islands have always sought to create a sustainable environment for their populations and have had to use ingenuity, collaboration, and civic will to make it happen—and often by using innovative technology. In this way, islands can be viewed as living laboratories of what could be scaled up for mainland communities. As the world responds to the energy crisis, islands can show a path for overcoming energy challenges.