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PostPosted: Thu Nov 26, 2020 11:02 pm 

Joined: Thu Nov 26, 2020 10:49 pm
Posts: 2
Dear team,

I have updated to the latest version (ver. ) so that I am not sure if this occurred in the previous version.
I have multple projects and they were all designed based on bifacial module with almost identical "Fixed Tilted Plane" in a large area.
out of several projects, only two projects made this warninig:
"Your PV system is not suited for the bifacial 2D model computation, You should choose "unlimited sheds" in the "orientation" part, or define regular shed arrays in the 3D scene."

I could not find any clue in the manual and google search.
therefore, I expect your technical team can advise me in this matter.

Reproducing procedure"
1) create new project by selecting "New-grid connected project",
2) the put the project name, load meteo file from SolarGIS data.MET
3) Click tab "Orientation" and set up "Fixed Tilted Plane" and OK. all values at the moment is default.
4) Click tab "System", put "planned power" and selected PV module and inverter.
5) then Click "Bifacial system" and select "Use unlimited sheds 2D-model. Then the warninig message pop up.

Could you please advise me why this happened?
I am using same ".MET" data as they are not far away each other, and the whole procedures are exactly same for more than 10 projects.
but only Two projects made this warning and could not continued.

I look forward hearing for you in this matter.

Best regards
Gyeongil


Attachments:
PVsyst_error.jpg
PVsyst_error.jpg [ 236.43 KiB | Viewed 2891 times ]
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PostPosted: Mon Nov 30, 2020 7:33 pm 
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Joined: Tue Oct 18, 2016 3:31 am
Posts: 401
It will give you that error. First complete the system design portion of your model, exit system menu. Then go to the shadings menu and create a shading scene to remove the error.


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PostPosted: Mon Dec 07, 2020 2:17 pm 

Joined: Thu Nov 26, 2020 10:49 pm
Posts: 2
Thanks for your prompt response.
however, this does not help anything and it seems like my fault.

all set-up was already done as you advised me but I forgot to change in "Bifacial system" and I tried to change the 2nd options.
when I go "Bifacial system" and apply to "Use unlimited sheds 2D-model" this happended.
I did the same way for other projects (more than 10 projects) and it worked except two project.

could you please advise me?

Thanks in advance.


Attachments:
File comment: see the red-colored.
A2.jpg
A2.jpg [ 125.64 KiB | Viewed 2719 times ]
File comment: all set-up was done.
A1.jpg
A1.jpg [ 178.49 KiB | Viewed 2719 times ]
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PostPosted: Wed Jan 27, 2021 4:11 am 

Joined: Wed Jan 27, 2021 4:05 am
Posts: 1
Quote:
Dear team,

I have updated to the latest version (ver. ) so that I am not sure if this occurred in the previous version.
I have multple projects and they were all designed based on bifacial module with almost identical "Fixed Tilted Plane" in a large area.
out of several projects, only two projects made this warninig:
"Your PV system is not suited for the bifacial 2D model computation, You should choose "unlimited sheds" in the "orientation" part, or define regular shed arrays in the 3D scene."

I could not find any clue in the manual and google search.
therefore, I expect your technical team can advise me in this matter.

Reproducing procedure"
1) create new project by selecting "New-grid connected project",
2) the put the project name, load meteo file from SolarGIS data.MET
3) Click tab "Orientation" and set up "Fixed Tilted Plane" and OK. all values at the moment is default.
4) Click tab "System", put "planned power" and selected PV module and inverter.
5) then Click "Bifacial system" and select "Use unlimited sheds 2D-model. Then the warninig message pop up.

Could you please advise me why this happened?
I am using same ".MET" data as they are not far away each other, and the whole procedures are exactly same for more than 10 projects.
but only Two projects made this warning and could not continued.

I look forward hearing for you in this matter.

Best regards
Gyeongil


Attachments:
File comment: Hello!

Gyeongil Kwak, did you solve why this warning pop up?
I have occurred this problem too.

1.png
1.png [ 32.64 KiB | Viewed 2414 times ]
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PostPosted: Tue Mar 02, 2021 9:05 pm 
User avatar

Joined: Tue Oct 18, 2016 3:31 am
Posts: 401
Quote:
Thanks for your prompt response.
however, this does not help anything and it seems like my fault.

all set-up was already done as you advised me but I forgot to change in "Bifacial system" and I tried to change the 2nd options.
when I go "Bifacial system" and apply to "Use unlimited sheds 2D-model" this happended.
I did the same way for other projects (more than 10 projects) and it worked except two project.

could you please advise me?

Thanks in advance.
Is your pitch uniform in the shade scene?


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PostPosted: Wed Mar 03, 2021 12:50 pm 

Joined: Wed Mar 03, 2021 12:24 pm
Posts: 1
I'm having a similiar problem as the thread starter, however my problem comes from the bifacial system definition not reacting to the settings in my 3d scene.

I'm in investigating how bifacial solar park can be optimized via varying pitch. To do so I have created 20 different shading scenes for bifacial modules where the only difference is the pitch, ranging from 11 m to 6 m in steps of 0.3 (giving us 20 shading scenes). But as soon as I import the shading scene for pitch 10.4 and 10.1 I get the same error as mentioned above, followed by the following text:

"Your PV system is not suited for the bifacial 2d model computation: the pitch between tables is not sufficiently homogenous. You should define regular sheds in the 3d scene"

The other pitches seem to be fine, for now I'm only getting this error for pitch 10.4 and 10.1. So i double-checked the shading scenes and the pitch is the same everywhere. But when i checked the bifacial system definition the pitch is not changed accordingly for pitch 10.1 and 10.4, but does so for the other pitches which is strange to me. And when I try to change the pitch manually it goes back to its old value after saving. Has anyone else encountered the same problem, and how can this easily be solved if possible?


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PostPosted: Tue Mar 16, 2021 11:56 pm 

Joined: Mon Feb 20, 2017 6:44 pm
Posts: 11
Similar problem for me. I am trying to model carport canopies with bifacial modules. 3 degree tilt. Some projects have only one azimuth, others have multiple azimuths.

However, none of these arrays would fit the description of a "shed" in PVsyst. And defining them in the 3D scene doesn't seem to make a difference--PVsyst says the systems are not suited for the model computation.

Can anyone confirm that modeling bifacial systems, can ONLY happen with sheds? And if yes, any appropriate work-arounds to get by this limitation (e.g. split each array into two subarrays of two sheds each, and make the pitch very large between them?

Thanks,
John


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PostPosted: Tue Jul 13, 2021 8:04 pm 

Joined: Fri Jul 07, 2017 3:27 pm
Posts: 36
correction, I updated to v7.2.4 and I sometimes no longer get this error. I sometimes do though, and am not sure what I'm doing differently. Is there a certain order to entering data that needs to be followed?
----------------------
Has there been any resolution on this topic? I also get that error, and am not yet finding answers in the forum or help.


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PostPosted: Wed Jul 14, 2021 1:03 pm 

Joined: Mon Sep 21, 2020 1:25 pm
Posts: 1
Quote:
Similar problem for me. I am trying to model carport canopies with bifacial modules. 3 degree tilt. Some projects have only one azimuth, others have multiple azimuths.

However, none of these arrays would fit the description of a "shed" in PVsyst. And defining them in the 3D scene doesn't seem to make a difference--PVsyst says the systems are not suited for the model computation.

Can anyone confirm that modeling bifacial systems, can ONLY happen with sheds? And if yes, any appropriate work-arounds to get by this limitation (e.g. split each array into two subarrays of two sheds each, and make the pitch very large between them?

Thanks,
John
I have the same issue. There is no option for defining bifacial system with multiple orientations. If we choose unlimited sheds then we can't have multiple azimuth. And if we define multiple azimuth in shading scene then it selects "Several orientations" and we get the "not suited for bifacial" error.


Attachments:
bifacial error 3.jpg
bifacial error 3.jpg [ 184.83 KiB | Viewed 742 times ]
bifacial error 1.JPG
bifacial error 1.JPG [ 82.6 KiB | Viewed 742 times ]
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PostPosted: Wed Jul 14, 2021 11:49 pm 
User avatar

Joined: Tue Oct 18, 2016 3:31 am
Posts: 401
Pitch and tilt need to be uniform for bifacial. Split the different orientations into different variants and combine in excel with the 8760.


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