Working on an open source solar generator backpack concept, details inside (aka how to strap a 50w solar panel to your back and charge a bunch of phones) : r/myog
Backboss: the first petrol-powered backpack generator
Sac à Dos 20L Unisexe Generator | Helly Hansen
Figure 2 from Lower-limb driven energy harvesting backpack: Design, performance and energetics | Semantic Scholar