josealjim

Hello everyone, I hope you can help me to solve this doubt. On the PV Syst tool "Electrical behavior of PV arrays"/ "Mismatch" we can generate a graph which will determinate the mismatch losses according to Normal or square distribution. On the graph generated there are 4 different MPPs, green dot, black dot, green square and black square. What are the differences between squares and dots? Thanks

Dear Mr. Mermoud, I have read the help information and the topics posted but they didn't clarify my doubts, sorry for my ignorance. You say that as soon as 1/3 of the sub-modules of a string are shaded, the whole string does not participate to the array power, but using the module layout with the version 5 I get different information. The configuration I want to make is 4 modules in a row for one MPPT. -1 row with every bottom sub-module fully shaded (attached): Linear shading on global= 14.2% Additional electrical loss= 20.9% Total= 35% -1 row with one module with 3 sub-modules partially shaded (attached): Linear shading on global= 8.9% Additional electrical loss= 17.4% Total= 26.3% -1 row with bottom sub-modules partially shaded (attached): Linear shading on global= 1.8% Additional electrical loss= 7% Total= 8.7% Could you please help me to understand why it is still producing when bigger area than 1/3 of the sub-modules is shaded? Thank you in advance. Could upload some examples of shading calculation with PVsyst? shading.rar shading

Hi, 1-In terms of having a more accurate shading losses, Would be better to distribute the PV area in cell sub-modules (same bypass, 2-3 areas per module)? The bypassed area at the simulation will switch off when is shaded, leaving the rest of sub-modules producing, Would this sub-modules 3D configuration give problems with the final simulation? 2- Do I have to set then the fraction for electrical effect at 100%? 3- Additionally, Should I change the mismatch losses default parameter from 2.1% to 0%? 4- Can you please explain me the relation/differences between "shading ratio" at Electrical behavior tool and the "Fraction for electrical effect" at the 3D simulation? Thank you in advance