This thesis explores the recent evolutions of photovoltaics in France, and in particular the rise of grid-connected photovoltaics as it was triggered by support policies set up in the 2000s. The chosen actor-network theory approach leads to a material and relational descrption of French photovoltaics as modular technologies whose development was driven by political prices in the shape of feed-in tariffs for PV-generated electricity. From this perspective, the intertwinement of technological evolutions, market-making and politicisation is interrogated. After suggesting a description of photovoltaics as emergent and modular technologies and of feed-in tariffs as political market agencements, the thesis analyses the interwoven trajectories of ...