The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Gamesa Electric's[3] own commissioning announcement dates the Calheta III plant's commissioning to 17 September 2020.
The EU regional policy project page independently confirms the Calheta plant expansion tripling capacity via EU co-funding.[1]
The equipment supplier's own commissioning notice gives 17 September 2020 and the 37.5MW combined generator capacity.[1]
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