english: Powering them is one of the greater engineering challenges that we had to deal with, because powering a cell phone under a tree canopy, any sort of solar power under a tree canopy, was an as-yet-unsolved problem, and that's this unique solar panel design that you see here, which in fact is built also from recycled byproducts of an industrial process.
non_english: Njihovo napajanje je jedno  od najvećih inženjerskih izazova sa kojim smo morali da se nosimo jer je napajanje mobilnog  ispod krošnje drveta, bilo kakve solarne energije, bilo problem koji tek treba rešiti, a ovo je jedinstveni dizajn  solarnog panela koji vidite ovde, izgrađen od recikliranih nusproizvoda industrijskog procesa.