Solar energy is a promise. It has come to be seen as a solution to the present-perhaps the ultimate one, the only one. It names a future that we are already (all too slowly) creeping into, one which seems to have none of the problems that trouble or worry the present. In the face of the apparently intractable, unsolvable challenge of global warming, solar stands ready to ride to the rescue, shattering the tragic link between energy (fossil fuels) and CO 2 production. Thanks to solar, energy use will no longer be accompanied by doubt and anxieties about global footprints or melting Arctic ice. Solar energy announces the end of one historical cycle and the opening up of another. Against the looming eschatology announced by virtually every report about the juggernaut of global warming, solar reignites progress and offers it to the people and places left behind by fossil-fueled modernity. If that wasn't enough, there is at least the hint that solar might also solve all manner of political and social divisions, creating a world awash in energy, justice, and life.As this chain of promises might suggest, solar energy is also emerging as one of the sharpest and most powerful of ideologies, blurring concept, fantasy, and infrastructure together in a