Chen

OK， thanks

what does the C0 C1 C2..C5 mean？ thanks!

Dear PVsyst team： For the Imp/Vmp contributions 80/20%， is there any relevant literature to support the value of this parameter? Thank you！

OK,thanks

Ok，I wonder if our software can be considered this.

Dear sir： For the bi-facial module system , when calculating the cable loss of strings, should the current on the rear side of the modules be considered in our software？ thanks！

OK， u are welcome

Dear sir： I found that the inclination angles of the two are not the same. Is it a bug?THANKS

OK，thanks very much！

Dear sir： Can you take a look at this problem? Why is the backside mismatch loss calculated separately from the front side, rather than being added to the front side like irradiation. thanks！

When I completely shade the front side of the module and allowed the back side to receive light, I found that the loss due to weak light was relatively high.

OK，Thank you for your detailed answer.

ok，I agree with your viewpoint, but do you think this calculation is reasonable? if the fornt side of module receive irradiance of 1000 W/m², and the rear side of module receive irradiance of 200 W/m², front side：(f × 22- f × 22) / (f × 22) = 0% (relative) rear side：(f × 21.34 - f × 22) / (f × 22) = -3% (relative)

I understand. What I mean is, if the irradiation intensity on the back of the module is relatively low while that on the front is relatively high, so does it imply that the low-light performance of the rear side is worse?

Because the irradiance of the front side or the rear side of PV module will be different, in this case, there will be a difference in conversion efficiency between the front and back sides,with respect to 1000 W/m².