Wikipedia provides pretty ‘encyclopedic’ coverage of an ever-expanding universe:

Solarpunk is a literary and artistic movement that envisions and works toward actualizing a sustainable future interconnected with nature and community.^[3][4]

Solarpunk – Wikipedia

There are lots of similarly shaped online encyclopedias.

This is from the entry from ‘Appropedia’, the ‘sustainability wiki’ – including a particularly good list of links and references:

Solarpunk is both a lifestyle movement and a relatively new eco-futurist, speculative fiction subgenre focused on envisioning a positive future beyond scarcity and hierarchy, in which humanity is reintegrated with nature, and technology is used for human-centric and ecocentric purposes.^[1]

Solarpunk philosophy tends to be fairly pragmatic and proactive, it asks ‘what can we do right now’ and then does whatever that is.

Solarpunk – Appropedia

There are more wikis:

Solarpunk – Wikiwand

Solarpunk | Aesthetics Wiki | Fandom

Here’s the granddaddy of them all – the wiki of r/solarpunk subreddit:

index – solarpunk