How to Determine the Most Efficient Orientation for Small Solar Arrays?

Understanding Site-Specific Orientation

When determining the optimal orientation for a small solar array, it’s essential to consider the site’s specific characteristics and location. The time of year and latitude of the site will greatly impact the amount of direct sunlight the array receives. For example, at northern latitudes, the array should be positioned to face within a 15-30 degree angle of true south to maximize winter sunlight. Conversely, at southern latitudes, the array should face within a similar angle of true north.

Using the Azimuth Angle

The azimuth angle, measured from true north, will help determine the optimal orientation of the solar array. Using a solar path simulator or a compass, identify the true south direction at your site. For small arrays, an azimuth angle within 15-30 degrees of true south is generally ideal, as it allows for maximum winter sunlight while still capturing a significant amount of summer sunlight.

Accounting for Shading and Obstructions

When positioning the solar array, be mindful of potential shading and obstructions, such as trees, buildings, or power lines. Consider using a shading analysis tool or conducting a site survey to identify potential shading issues. This will help you determine the optimal array orientation and tilt to ensure maximum energy production while minimizing the impact of shading and obstructions.