Extra‐firm actors have been acknowledged as vital to the success of green energy industries. This article deploys the firm network perspective to deliver a first of its kind analysis of specific extra‐firm actor impacts on firm performance in Korea's solar photovoltaic industry. Results are based on quantitative analyses of data from 60 firm respondents and augmented by interviews with eight government officials. Three research questions capture and compare firm and government actor perceptions pertaining to extra‐firm actor influences at the national, regional, and extra‐local scales, inclusive of place–place competition and cooperation. Results indicate that firms differ in perceptions related to the impact of 18 national level government institutes, R&D centers, associations, and academic societies on their success, and that perceptions vary by level of technology concerning a plethora of other related extra‐firm actor and support infrastructure impacts. A comparative perspective is presented based on government informant interviews.