YouSolar is working with our customers to produce (and store) as much of the home’s energy locally as possible. The photo demonstrates solar panels mounted vertically and at 60 degrees (relative to the horizon) on a retaining wall. Vertical panels are easy to mount, but 60-degree panels are optimal. Ultimately, we chose a row of panels mounted vertically in landscape mode with two panels in portrait mode at 60 degrees below. This solution maximized solar production in the winter and fit the most solar on the retaining wall.