The new generation of N-type TOPCon technology modules, through the combination of innovative rear optical design and high-transmittance glass, successfully increased the bifaciality to more than 85%. As a key parameter of double-glass modules, bifaciality directly reflects the photoelectric conversion ability of the back of the module when receiving scattered light and reflected light, which in turn affects the comprehensive power generation efficiency of the module in practical applications.

1. Better power generation performance

In Gansu, Jinko's bifacial solar panels achieved an annual power generation of 5049.1 MWh on grass ground with an 85% bifaciality. When switched to sandy ground, the annual power generation soared to 5581.7 MWh. In contrast, the annual power generation of modules with a bifaciality of 65% on grass ground is 4993.4 MWh; the annual power generation on sandy ground is 5456.5 MWh. This difference stems from the efficient use of back light energy by high bifaciality modules, especially on sandy ground with high albedo, where the advantage is more obvious. TOPCon solar panels gain 1.12% in grassland environment, and 2.29% in sandy environment.

2. Higher return on investment

High bifaciality modules significantly increase power generation by capturing more light energy, thus bringing higher economic benefits to customers. Taking the Gansu project as an example, modules with a bifaciality of 85% can generate 55.7 MWh/year more on grassland and 125.2 MWh/year more on sandy ground compared to other modules with a bifaciality of 65%. This increase in power generation directly translates into higher electricity sales revenue, effectively shortening the project investment payback period and increasing the return on investment over the entire life cycle.

In sandy and grassland environments, TOPCon solar panels with high bifaciality (85%) modules and low bifaciality (65%) modules have gains of 2.29% and 1.12% in the first year of power generation, respectively. In addition, when the ground albedo increases by 0.17, the power generation of high bifaciality modules increases by 10.5%, while that of low bifaciality modules only increases by 9.3%. Test results show that in the complex environment of a photovoltaic power station, N-type TOPCon high-bifaciality modules can more sensitively capture scattered light and reflected light than other low-bifaciality modules, and efficiently convert them into electrical energy, thereby significantly improving the overall power generation of the modules.