Advanced performance of bifacial double-glass modules

What is the difference between a double glass bifacial module and white encapsulant?

Compared to the double-glass bifacial module, a 2% higher Isc is ob-served for the white bifacial module, which corresponds to a 2.2% higher power rating. White encapsulant can even help monofacial cells achieve pseudo-bifaciality.

What percentage of bifacial modules are double-glass?

Currently, 90% of the bifacial modules are double-glass modules. At the beginning of the bifa-cial era, many double-glass modules were offered with a frameless version. Due to glass breakage during mounting and difficulties related to complicated mounting systems, double-glass modules with frames became state of the art.

Are bifacial PV modules better than monofacial?

The outdoor studies revealed clear advantages in the energy yield performance of bifacial over monofacial PV modules. However, the quantification of energy gain is only possible when the module performance ratio is referred to the output power of the front side. Bifaciality depends strongly on cell-technology, varying from 60% to 90%.

How to improve optical performance of glass/glass bifacial module?

We further enhance the optical performance of the glass/glass bifacial module using a white reflective coating selectively in the cell-gap area of the module. A current gain of about 3% is achieved. Combining both solutions (IR reflective coating and white reflective coating), we obtain about 4% current enhancement.

How bifacial module is optimized?

Through in-depth characterization, we optimize the white reflective coating and the module design. The bifacial module with optimized white reflective coating generates about 3% more current, as compared to a standard glass/glass bifacial module without any coating.

Are bifacial PV modules degraded?

Degradation due to potential differences has been seen in bifacial PV modules based on different types of bifacial solar cells: n-type , and p-type , . The frame, glass, encapsulant, and other module packaging components can play an im-portant role in the extent of PID of PV modules.