My last several winters in Denver I had outside my south and west living room window ( seen here) a solar array made from scavenged doors hinged together, each covered with shiny mylar plastic I scavenged giant rolls of at a coffee roasting plant. Each array was held up by scavenged metal racks, and it took just a few minutes to 3X daily change their positions to reflect in the most sunlight during those seemingly endless winters. They not only did a LOT to heat my home during those VERY lean times as a landscaper each winter, they let me grow roses and tomatoes indoors, which did wonders for my spirits. HGTV shot a segment there one year, come to think of it!