Can someone please explain the diagram loss for bifacial?

[RobSolar]

Let's consider the diagram loss attached. How the 176 kWh/m2 for bifacial gain is calculated? Because if you take 1111 kWh/m2 and apply all the losses/gains (-73.71%, -81.34%, +15.6%, +0%, -9.9%), you don't reach the value 176 kWh/m2.

 

176 kWh/m2 is the 7.07% of 2488 kWh/m2. But even if you apply the bifacial losses/gains to 2488 kWh/m2, you also don't get 176 kWh/m2.

[Linda Thoren]

Hello,

Indeed this is not very straightforward. The irradiance on the rear side is renormalized to the 4806872 m2 of collectors after the View Factor (1111 -73.71% -81.34% * 14897331/4806872 +15.6% +0% -9.9% results in 176). This further explained in the help page below:
https://www.pvsyst.com/help/project-design/bifacial-systems/bifacial-systems-results.html