I live in a ground-floor apartment of a 4-floor building. In each floor there are 4 apartments. My apartment is in the quarter facing West-South-West and North-North-West; see this satellite image I took from Google Maps (north is up): I would like to install solar lamps on the two external walls of the apartment, to light up the backyard at night. What is the best orientation to install them at? (I know that the optimal orientation for solar panels is South, but I do not have a South-facing ...
