Fresh Questions, Practical Answers: PVsyst Q&A Series #19

1.How to Calculate the power generation gain of the back side of Bifacial system? Answer: During the simulation, you can first choose single-sided simulation and then select Bifacial system. By subtracting the power generation of the two, you can calculate the theoretical power generation of the back side. 2. What is the difference between the back radiation gain and the power generation gain in a bifacial system? Answer: The backside radiation gain is an optical gain, which is different from the electrical gain. Therefore, the optical gain cannot represent the bifacial power generation gain. For example, as shown in the figure below, the backside radiation gain is 4.1%, and the actual effective backside radiation gain needs to be multiplied by the bifaciality factor of the PV modules. The power generation gain can be obtained through single-sided simulation and bifacial simulation. In this example, the single-sided power generation is 152,089 MWh,…