Solarpunk fiction is a form of climate fiction, but by focusing on the changes we could make, it can move us past climate anxiety, says author and editor Sarena Ulibarri. She introduces us to five favourites: ranging from near-future to far-future, they present a collection of thought experiments in the ways humanity might yet choose to live.
Paulo Baciagalupi is also worth looking into, his book The Water Knife is not explicitly solarpunk either but does deal with resource scarcity and the maladaptations a capitalst world will make to it. He has an excellent short story in the book Rewired: The Post-Cyberpunk Anthology called The Calorie Man which is in the same vein. That is an amazing book on it’s own, there are a number of excellent stories included.
Unfortunately I don’t know if I’ve come across any books with the inherent hopefulness of solarpunk, but I would love to read them.