Bifacial System cannot be applied on the Candela3d near shading model

[Solaranger]

 

I'm trying to use bifacial simulation on the 3d model that I made using Candela3d (Sketchup Plugin), but PVSyst cannot run the simulation. My guess is because PVSyst can only run bifacial simulation if I use "array of tables" in the shading simulation. Is my guess correct? or should I do something to run the 3d model from Candela3d?

[Michele Oliosi]

Hi !
Actually, you do not need to have an "array of tables" in the 3D scene to apply the bifacial model, but there are a few regularity requirements that have to be met:
https://www.pvsyst.com/help/bifacial-conditions.htm

However, it cannot be expected that you modify the pitch of your plant just to run the simulation. For that reason, it is possible to modify the threshold for the activation of this error. Since this error stems from the evaluation of the standard deviation on the pitch distribution, the threshold can be changed in the advanced parameters : Home window > Settings > Edit advanced parameters:

Please be aware that while this won't modify the results of the simulation, it will allow you to simulate a situation in which the bifacial model (which is a regular idealization using the average pitch and table size values) will not fully represent the complexity of the 3D scene. However, usually, unless you have a very strange setup, the error from this discrepancy is minimal.

[Solaranger]

Thanks for the solution I've already solved the issue using that solution, however I've stumbled into different problem. When I use multiple orientation in the system, bifacial effect couldn't be use because it only can run on "fixed tilt" or "Unlimited sheds". Is there any solution for this issue?

 
 

 

[Linda Thoren]

Hello,

In the current version on PVsyst, you can only have one orientation for a bifacial system. As Michele has mentioned above, there are a few regularity requirements that have to be met, you can find the bifacial conditions in this link:
https://www.pvsyst.com/help/bifacial-conditions.htm

As well as a youtube tutorial on the subject:

Note that, as for the Pitch, the tolerance for the Max. tilt axis for the Bifacial 2D model can be modified on the Advanced parameters.

Kind regards