With the increasing reliance on technological advancements, it becomes imperative to critically examine and evaluate their implications on society and the environment. The concepts of acceptance and acceptability have gained prominence among researchers shaping technology implementation strategies. However, the lack of precise definitions for these concepts leads to diverse interpretations, compromising their usefulness in technology development and impeding further progress in research endeavours. This paper illustrates how these important concepts have been used in the energy technology discourse and develops a schematic overview highlighting the varied overarching interpretations of these concepts: the funnel of acceptance and acceptability. It underscores how different research levels – institutional, societal, and individual – affect the relevant understanding of these concepts. The funnel metaphor emphasises the interconnectedness of these interpretations and underlines the importance of addressing all research levels to ensure technology implementation processes advance in a desirable and responsible manner.