The island of Orkney is also doing similar, and is used as some kind of test site for the tech I think:

https://www.youtube.com/watch?v=FXe1hBvlylw

It has wind power, sea water sourced heat pumps, a little bit of solar, a test rig for underwater wave power, batteries that are used to relieve the peaks on energy transmission to the mainland and projects to increase electric car uptake to soak up excess energy production.