He is a prominent Ukrainian youtuber and inventor, who experiments a lot with solar energy and generously explains them in depth. Сергей also observes many international projects and trends, albeit all in russian.
Numbers are important for him: efficiencies as well as costs are always in the center, be it a large scale experiment or a small DIY project.
His youtube channel was silent since late 2021, so we can just hope he is safe and sound.
