Do Ground-Mounted Bifacial Panels Outperform Roof-Mounted Ones?

Ground-Mounted Advantages

Ground-mounted bifacial panels typically perform better than roof-mounted ones due to several factors. For instance, they can be installed at a fixed angle that maximizes the angle of incidence, resulting in up to 25% more energy production compared to roof-mounted panels. This optimal angle is often around 30-40 degrees, allowing the panels to absorb both direct and reflected light.

Roof-Mounted Limitations

Roof-mounted bifacial panels face challenges such as limited space and varying roof angles, which can reduce energy output. In many cases, the optimal angle of incidence is not achievable due to the constraints of the roof, resulting in reduced efficiency. Additionally, roof-mounted panels are often installed at a steeper angle to accommodate roof curvature, which can lead to reduced energy production.

Comparison Studies

Studies have shown that ground-mounted bifacial panels outperform roof-mounted ones in various conditions. For instance, a study by the National Renewable Energy Laboratory (NREL) found that ground-mounted bifacial panels yielded 15-20% more energy than roof-mounted ones in a sunny environment. Another study published in the Journal of Solar Energy Engineering found that ground-mounted bifacial panels performed 10-15% better than roof-mounted ones in a mixed-climate environment. These results highlight the advantages of ground-mounted bifacial panels in optimizing energy production.