Mind expounding on that? I'm not exactly knowledgeable with the whole Green Energy thing or Solarpunk beyond the tvtropes page. Feel free to PM me or we can start a new thread.
If we need to continue from here I say make a new thread, but its tangential to the space elf misanthropy stuff so I'll try to answer it here.
So I'm going to put the cart before the horse and talk about the punk part since its shorter and I'm less familiar with it. The punk genre revolves around rebellion. Whether its against the system or the Man or whatever is irrelevant, our heroes will be scrappy underdogs fighting enemies with greater systemic power. In cyberpunk you're fighting megacorps in a world where corporations have taken complete control of society, in diesalpunk you'll be fighting the emergent ideologies (usually fascism, but occasionally someone will remember that communism is bad too), in steampunk its supposed to the Victorian social system, and so on and so forth.
The important ingredient to this is that each type of punk is a mix and match package. In cyberpunk you'll also wrestle with what it means to be a person in a world with artificial intelligence, clones, mental downloads, and cybernetics. Or you'll debate the border between state and private power. Or maybe you'll have an analogue to humanity itself becoming obsolete. There are a lot of ancillary themes that can be explored. To give comparison Steampunk can wrestle with the cost of technological progress or the injustice of class systems. Dieselpunk frequently explores the radicalization of ideologues or how good intentions can transform into new tyrannies. The point being that all punk genres have a prepackaged suite of themes or tropes that can be swapped around or reused depending on the writer's preferences or beliefs.
And obviously there's the visual themes. All punks have quickly identifiable visual aesthetics that make them easy to identify, though this does cause other genres set in similar time periods to cast themselves as 'punk'. A Girl Genius type romp of adventure and danger is a pulp, not a punk story, even if both use dirigibles and lots of gears.
Where that translates into Solarpunk is that you are rebelling
against the solar themes, which will require me to explain the Green thing.
I have an extensive background in environmentally friendly industries. I've manufactured water conserving fertilizer, sold bio remediacts to clean up oil spills, worked the technical side of environmentally friendly commercial cleaning chemicals, ion and ozone based air purification, and even fracking nanotech designed to make oil sites cleaner and more efficient. This means I've worked alongside geologists, windmill engineers, agriculturists, and so on in the most active and practical environmental industries currently working. The one thing all these people have in common is that they hate the Green movement with a burning passion.
In modern politics you will almost always find a functionally irrelevant Green party lurking in the background of every country and they always want one of two things. Barely disguised socialism or a competently asinine level of societal regression. You've probably heard of the Green new Deal that gets bandied about in Democratic circles. Its a functionally impossible attempt to forcibly alter the US' infrastructure to run off of only a select few 'clean' energy sources. The capacity and cost of these approved sources is never taken into account, secondary knock on effects are never accounted for, and the sustainability of this system once in place is never considered. And its honestly one of the saner proposals I've heard out of the Green movements which tend to value the environment over human good. The recent obsession with climate change is fundamentally just a justification to implement extreme measure for presumed good of all mankind. Notice how often left leaning politicians make off-handed remarks about looming climate catastrophe.
The penultimate Green ideal is a zero impact society, one where human activity has a negligible impact on the environment and the ecosystem remains clean and unaltered. This ignores a lot of realities about what climate change actually is, but the fundamental ideal is not in and of itself bad. Its the implementation and inferred implications that makes this heinous. Any society that prioritizes zero impact would have to be heavily regulated and controlled. If a few families wander off and start building log cabins and farms that has a huge impact on the environment. And if these outsiders want to engage in industry and commerce to improve their situation, well that drastically increase impact. So everyone must be controlled, their standards of living kept modest, their movements restricted to certain approved preserves, and their daily lives regulated to the hour. Enterprise and entrepreneurship would only increase impact and so would have to be curtailed. Even family sizes would need to be regulated as expanding family groups would require increasing amounts of resources.
All of this ignores what happens when your theoretical Green society encounters one that lacks such compulsions. Or even what it does to compensate for regular occurrences such as environmental disasters, disease, crop failures, or natural climate change. This is why the more practical of such people dream of humanity eventually living in arcologies, self-contained, self sufficient spires that effectively hermetically seal humanity inside. Such structures would have a bare minimum of personal space let alone privacy as they would by necessity be communalistic to support such a tightly regulated existence.
So to bring that back to the point, any Solarpunk story would be about industrious or inquisitive rebels straining against a tightly controlled, communalistic society where no one is allowed to grow beyond what the leadership deems acceptable. It would be about parents hiding their third child or a young person venturing outside of the approved zone or a black marketeer trading illicitly with outsiders. Its actually a pretty cool idea, but that's not what is currently being written nor is it what the proponents of Solarpunk have in mind when they push it.
The current cheerleaders of Solarpunk are people who want to 'subvert' the punk (and 'grimdark') genre with 'hopepunk' stories as Navarro mentioned. The problem is that from what little Solarpunk I've read its basically post-apocalyptic
cyberpunk where our heroes are socialists in a society that is hobbling along on renewable resources. It misses the point and theme of the punk genre, pushes bad propaganda from political extremists (I didn't even talk about the anarcho-primitives), and falls into the many, many traps of deconstructive fiction, where it spends more time on what it's not rather than what it is.
If you want to write a story set in world where everything is run on renewable resources, that's great! But its not a punk story and will fundamentally violate the central precepts of Green ideology unless the world building specifies that people are not allowed to found new new towns or expand existing industries. Dinotopia is not Solarpunk.
Anyway, I hope that ramble helps. If not let me know and everyone else can feel free to pontificate on just how misanthropic such a setting would end up being.