In North Korea you need your balcony solar cells to power your phone because most households have no power lines. Germans pretty much copied this tactic when energy prices briefly went through the roof and it caught on. North Korea did it first and it‘s actually kind of sad people have to resort to such measures in a seemingly rich country like Germany because we‘ve made us very energy dependent when we were world leaders in renewables not long ago. There should be solar and wind parks everywhere by now but citizens have to take care of that themselves. It has a nice side effect of being less reliant on the grid but no balcony cell is gonna power your fridge for very long on it‘s own. It‘s just cheaper in the long run but it really shouldn‘t be. The government shouldn‘t have slept on it for so long.