Quick Answer
Bifacial solar arrays require a relatively large clear space behind the panels to capture reflected light, typically 10-30 feet, depending on the panel's efficiency and the surrounding environment.
Space Requirements for Bifacial Solar Arrays
Bifacial solar arrays take advantage of light reflected from the ground to increase energy production. To maximize this effect, it’s essential to provide a clear space behind the panels, free from shading and obstructions. This space, also known as the ‘soiling area,’ should be roughly 10-30 feet behind the array, depending on the panel’s efficiency and the surrounding environment.
Factors Affecting Space Requirements
Several factors influence the required space behind a bifacial solar array. The efficiency of the panels plays a critical role, as higher-efficiency panels can capture more reflected light. The type of surface behind the array also matters, with light-colored surfaces reflecting more light than dark-colored ones. Additionally, the angle of incidence and the amount of direct sunlight the array receives impact the space requirements.
Best Practices for Space Optimization
To optimize the space behind a bifacial solar array, consider the following best practices. Use a light-colored surface, such as gravel or sand, to maximize reflected light. Keep the space free from shading and obstructions, including trees, buildings, and other solar panels. Finally, ensure the array is installed at a slight tilt (around 5-10 degrees) to allow for optimal light capture. By following these guidelines, you can maximize the energy output of your bifacial solar array.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.