This has been under review for over 2 years now! It still does not work, and it is super complicated to install the required dlls and drivers. See here: http://community.powerbi.com/t5/Integrations-with-Files-and/Connect-PowerBI-Desktop-with-PostgreSQL/m-p/76910#M5831 Please give us an update on this issue!
Under review for 3 years?? Why exposing a connector when it obviously doesn't work as advertised. There are a ton of threads in Power BI online with massive challenges to connect to Postgres hosted on AWS... Please fix!