I'd recommend checking out our local documentary community, !documentaries@slrpnk.net, which is chock full of docs! :D

Though admittedly, most of the ones there are not directly related to solarpunk. Since the movement is really only just catching on in the mainstream, there's not much documentary/movie content about it.

The only fictional movie I can think of that's solarpunky would be Strange World from (ironically) Disney.