PVsyst is designed to be used by architects, engineers, and researchers. It is also a very useful educative tool. It includes a detailed contextual Help menu that explains the procedures and models that are used, and offers a user-friendly approach with a guide to develop a project. PVsyst is able to import meteo data, as well as personal data from many different sources.
Very useful as this is updated semi often, also has a public facing download: https://www.pvsyst.com/download-pvsyst/