EngineerSolar

Hi PVsyst experts, I am trying to find the factors that impact on the ground reflection on front side which appears in loss diagram in Bi-facial module simulations. Other than geometry parameters such as tilt, pitch, coll band width etc. I assume albedo that is defined in both project settings and system definition should bring some impact as well to this gain. However, by playing with the albedos in the simulation, I realized the higher the albedo, the smaller this gain is. It is quite surprising as I imagined the more reflected light, the more energy should be produced for the front side cells. Could someone help me understand why the result is opposite? Regards

Hi dear engineers, I am running simulation for a solar farm using the pan file from a client. However, I found in the pan file, the Rshunt and Rserie are defined irregularly high which led to a gain at the irradiance level. Knowing your method of calculating defaults are as below: -Rshunt = Vmp / (0.2 * (Isc-Imp)). The 0.2 coefficient may be different for other technologies (0.33 for amorphous). -Rserie is determined according to the low-light performance resulting from the model, in order to obtain a relative efficiency of -3% at 200 W/m2. I'm wondering if you have any recommendation for a range of Rshunt and Rserie values in the simulation? Thank you in advance for helping!