[Array Virtual energy at MPP]

please , can explain what is the difference between the virtual energy at MPP and the energy really used by the system EArrMPP and which is the really energy putted as input of the inverter ??

[Array Virtual energy at MPP]

Hello PVSyst community ,

I want ask what is the difference between Array virtual energy mpp and the real input energy to inverter , is the array virtual energy at mpp is the therical energy after losses ? 

[perez model]

hello pvsyst community ,

 

in pvsyst help I have found how to calculate transposition using hay model , but nothing mentionned for perez model , and I want see factors that effect the diffuse componenet 

thanks in advance

[OND file missed VmppNom]

Hello pvsyst community , 

I want ask why manufacturer don't specify sometimes VmppNom in ond files ?? and why pvsyst consider that vmppnom is a weak condition ?? because what I know that VmppNom is an important parameter to calculate P_ac inverter , thanks in adavance

[Monte Carlo method and view factor]

Hello pvsyst Community ! 

I want ask about view factor calculation in pvsyst ! does pvsyst use Monte Carlo methode to calculate view factors ?

 

thank you

[Diffuse on ground / diffuse ground fraction in bifacial]

Thanks Michele for your reply ! now I want know the diffuse acceptenance and it relationship with diffuse fraction on ground 

[Diffuse on ground / diffuse ground fraction in bifacial]

Hello PVSYST community ! 

I have you are fine , I want ask about diffuse fraction on ground , how it's only depended on geometry of system as said Dr.André mermoud in FAQ simulation 

thanks

 

[relation between rear side view factor and BkVFLss]

Hello pvsyst community !! 

can any one help me to understand the relation between these 3 values related on view_factor  

and this one in loss diagram   and this one in general simulation parameter in bifacial module    

I have learn also about view factor model in 35th European Photovoltaic Solar Energy Conference – Brussels, Belgium, 24-28 September 2018 article but I can't really understand how it calculate the view factor . 

thanks for advance 

[view_factor_for rear side diagram loss]

hello pvsyst community ! 

I am new at pvsyst and I am wonder about difference between this view factor (at diagram loss) and view factor in bifacial system definition 

 

many thanks at advance

[view factor for rear side]

Hello pvsyst community ! 

Can you please explain this said by pvsyst help in bifacial systems procedure  : 

how view factor depends on geometry of module choosen ( unlimited sheds or unlimited trackers) I don't understood the inicator said 

please any help will be appreciated

Quote

Reemission form factor :  represents the fraction of the irradiance from ground reaching the back side of your system. This is calculated as an integral for each point on the ground, and you have here the result of the average from the model. This only depends on the geometry. For tracking systems, it depends on the tracker's position. This is an indicator calculated from the model what is means