That is not solar punk.
Solar punk is a peaceful vision of the future in harmony with the planetary boundaries.
This is militaristic fantasy with more of the color green than usual.
I can't argue with you, but the artwork is so cool I want to imagine it being used by an environmental collective to defend a forest or something, right at the beginning of the solarpunk revolution. Like this shit is all built out of recycled and repurposed farming equipment.