I began looking at the Wikidata information on hydro-electric power stations, whose development was a feature of 20th century Scotland. Some of the date information is scant, and some is inconsistent. More recent community-level hydro projects (such as Rumbling Bridge) are also missing. But it is a grounding which can be improved by seeking data sources.
I then extended the view to other Renewables, mainly onshore wind power. Again, the data omits a lot of projects which are operational, especially community ones.
A queryable map is here.
Subsequently, @SchwarzeLocke pointed me to excellent existing resources, such as the very detailed map here.
