Different azimuth in Near Shadings and Orientation tabs

[brunok]

I have designed the 3D model in the 'Near Shadings' and set the azimuth to -23 degrees using the 'Rotate whole scene' in the Edit menu. However, PVsyst sets the azimuth to 5 degrees in the 'Orientation' tab. Eventhough I checked the 'Detailed, according to module layout' check box in 'Near Shadings' to run the simulation, the report lists azimuth as 5 degrees, which makes me believe that the simulation ran with this azimuth. PVsyst version is V6.67. Need help to understand what is going on. Thanks in advance.

PS: I attached a presentation to help the understanding of the issue.

Near Shadings

Orientation

Report

[Sylvain Pepoli]

Hello brunok,

The orientation is defined by the normal of the PV fields plane, in the global referential. So it is a combination of the field's tilt, azimuth and baseslope.

It seems like you placed your fields on the rooftop and then rotated the whole scene, so in this case the baseslope should be the roof angle.

Placing your fields on the ground would get you a -23° azimuth, but here they're tilted along the roof.

Which orientations does PVsyst detect when you open the orientations tool (Tools -> Edit orientations) ? It seems like you defined two separate orientations (on each side of roofs) but you only get one in the end ?

[mubashir]

I am encountering the same error

The orientation tab is showing the wrong orientation of the panels. Please clarify which panel orientation has been considered in the simulation.

[Sylvain Pepoli]

Hello,

Could you please give more details because the screenshots all show an orientation of 10°/43° which seems correct ?

[Irakli Bezhuashvili]

Thank you for the help.

I have one more question. Is it possible to change "Plane Azimuth" and "Plane tilt" by editing ? Please see the attached screen where this data are not editable.

 

 

 

[Muhammed Sarikaya]

Dear Irakli,

 

It's possible to change these values. If you select all the tables, your modification will apply to all the selected tables.

To modify the tilt, for example, just click in the box where you want to change the value, and it will be applied.

 

Regards,

Muhammed Sarikaya

[Irakli Bezhuashvili]

Thank you for prompt reply.

The box which I want to change is not editable, I click but is has no affect. Please see the attached file "Screenshot_1" where I indicated with arrow the field which I want to modify (Nominal-real tilt and azimuth). Nominal tilt and nominal azimuth has modification function, but I want the nominal tilt and nominal azimuth to be equal to  real tilt and azimuth, That is why I want to change real tilt and azimuth. For example table filed #104 has plane azimuth 5.9 which has to be 0 and plane tilt is 30.2 which has to be 30.0.

 

Thank you

 

 

[Muhammed Sarikaya]

Dear Irakli,

Indeed, these values cannot be edited. When working on a project with complex topography in PVsyst, the solar tables installed in the field will often have actual azimuth and tilt values that differ from the expected nominal values. This occurs because the software automatically adjusts each table to the local topography, resulting in natural variations in these angles.

Can you confirm that you are working with a topography? Also, could you explain why you want to modify these values?

Regards,

Muhammed Sarikaya

[Irakli Bezhuashvili]

Yes I works with topography.  The PVsyst aligned solar tables to the field surface based on the topo map, but in reality we will have all the tables with tilt 30 and azimuth 0 (we plan to design the support structures in this way). changed/aligned  azimuth and tilt reduces electricity generation.

[Muhammed Sarikaya]

Dear Irakli,

In this case, don't use the topography in PVsyst if you plan to adjust all the supports to have the exact same tilt and azimuth.

Regards,

Muhammed Sarikaya