I live around 49°N and get an average of ~3 hours of rated output per day over the course of the year. OP's is closer to 1 hour per day. My array does have a c

I live around 49°N and get an average of ~3 hours of rated output per day over the course of the year. OP's is closer to 1 hour per day. My array does have a clear view of the southern sky, and the angle is supposedly ideal for a fixed array at my latitude. And our longest days tend to also be our sunniest, but it looks like rooftop is much better than balcony, where it's feasible. (Interesting aside: everywhere on earth (to a first order approximation) gets the same number of hours of daylight over the course of a year. Thus the biggest downside of a higher latitude solar installation is that the sun is passing through more atmosphere on its way to your panel).