How important is the orientation of solar collectors in winter?

Importance of Winter Orientation

When the sun is lower in the sky during winter, solar collectors need to be positioned to capture as much direct sunlight as possible. In areas with high latitude, such as northern Europe or North America, the optimal orientation for solar collectors can be up to 30° south of true south to account for the lower winter sun angle. This ensures that the collectors receive the most direct sunlight during the winter months.

Techniques for Winter Orientation Optimization

One technique to optimize collector orientation in winter is to use a fixed tracking system that adjusts the collector’s angle seasonally. For example, a collector in a location with a 35° latitude could be set to 20° south of true south in winter, and then adjusted to a more easterly angle in summer. Another approach is to use a two-axis tracking system that adjusts the collector’s angle and azimuth (direction) to track the sun throughout the day and year. This can be more expensive than fixed tracking systems, but provides the highest energy output.