The authors investigate how the executives of the two largest research institutes for photovoltaic technologies — the National Renewable Energy Laboratory (NREL) in Golden, USA and the Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) in Freiburg, Germany — have made use of public framing to secure funding and shape the technological development of solar photovoltaic (PV) technologies. The article shows that the executives used four framing dimensions (potential, prospect, performance, and progress) and three framing tactics (conclusion, conditioning, and concession), and that the choice of dimensions and tactics is tightly coupled to the characteristics of the specific technologies pursued by the research institutes.