Data and materials used in a study of the diverging conception of transparency by experts and citizens in the context of smart electric vehicle (EV) charging. The data consists of: documents produced during a design project of a transparent smart EV charge point; two versions of a user interface (UI) prototype in PDF format; and transcripts of interviews with design evaluation participants. Using reflective thematic analysis, we generated a number of themes that capture how project team members ("experts") and EV drivers ("citizens") understand and respond to transparency of an urban AI system. These findings are described in a forthcoming publication. Approval was obtained from the university's Human Research Ethics Committee. All participants in this study gave their informed consent to participation and publication.