Linda Thoren

Dear Diana, You can generate graphs and plots through the detailed results window (pre defined graphs or hourly graphs for a large amount of simulation parameters). In the Advanced Simulation window, you have additional freedom to create custom plots that also can be included in the report. Another possibility is indeed to create an Output file with the relevant parameters and do the analysis in an external tool. Kind regards

The bifacial model presently available in PVsyst is based on a simplified 2-dimensional representation, with similar assumptions as the "unlimited sheds" or “unlimited Trackers” PVsyst simplified calculation. This approximate calculation may be extended to a 3D scene, provided that this 3D scene is sufficiently well represented by the "Unlimited sheds or trackers". You can read more about the bifacial model conditions in the following help page: https://www.pvsyst.com/help/project-design/bifacial-systems/2d-bifacial-model-conditions.html With multiple orientations and sub-systems with different table width, you can in version 8 create new "orientations" in the orientations window and group all the tables with similar characteristics in a sub-system/orientation, and apply the bifacial model to each sub-system in the system window

Hello, You find a full explanation and a summery of common cases in the following PVsyst help page: https://www.pvsyst.com/help/project-design/shadings/electrical-shadings-module-strings/partition-in-strings-of-modules.html?h=partitio#up-to-748

Hello, You can find an article in our help that discuss the PR calculations: https://www.pvsyst.com/help/project-design/results/performance-ratio-pr.html?h=pr Kind regards

When creating your site, you can simply write or copy your values in the "Monthly weather data" tab

In your print screen you see all the details of the number of modules in each sub-array and each table assign to the defined orientations. The difference between your print screen and the video is that the folders are collapsed. Click on the small minus icon collapse the folder and see the total of modules in the system/3D scene for each orientation. If they do not match, you need to add/substract the modules defined in the 3D scene, or in the system.

In the 3D scene you can define each table by modules. In the Orientations management you find detailed information about what is defined for each orientation In the following youtube tutorial you find examples of how to define a 3D scene and how to navigate in the window: On our website you can do a request for a training sessions on various topics: https://www.pvsyst.com/en/training/consulting/

Hello, The error message indicated that the 3D scene and the system definition does not match. For instance, in the first orientation (tilt 5° and Azimuth 180°), 1564 modules are defined in the system but only 1427 in the 3D scene. Verify also that the orientations, are correctly defined. In PVsyst, Azimuth of 0° is towards the equator, and 180° thus the opposite orientation (North is the northern hemisphere and South is the southern hemisphere)

Please send your project to support@pvsyst.com and we can have a closer look. Kind regards

Indeed, the unlimited sheds only consider the row to row shadings. For a more detailed analysis of the shadings from objects such as trees and buildings, you can define a 3D scene and simulate the electrical shadings with the module layout. The following youtube tutorial illustrates haw to create a 3D scene, and the following link to our help page, describe how to define the module layout: https://www.pvsyst.com/help/project-design/shadings/electrical-shadings-module-layout/index.html

hello, In the print screen you have activated the "multi MPPT feature" and defined 3 MPPTs, though your inverter has 2MPPTs per inverter, this 1.5 inverters with a total of 15kWAC for a nominal PV Power of 13.9kWp. The following youtube tutorial shows in detail how to define your system configuration (in version 7):

Hello, In the second print-screen, you must activate the option "Use the sharing of Nominal Power between MPPT inputs of a same inverter". You find a full tutorial of how to use this tool (version 7) in the following youtube video: Kind regards

Hello, Thank you for reaching out. Please first verify that you are indeed simulating the first year (that in the aging tab in the detailed losses window, year 1 is defined). What PVsyst version are you using ? Some discrepancies and rounding errors can appear Kind regards,

Indeed, the bifacial calculation in PVsyst is based on a 2 dimensional representation for regular system layout, thus same orientation, table size and pitch, to calculate how much irradiance is falling between the tables and how much will be scattered up on the back side. You can define individual orientations for each table. Though, since you need a pitch it is not yet possible to simulate a bifacial system with a single row. A possible workaround is therefor to duplicate your 3D scene so that PVsyst can detect a pitch, similar to the example below: Verify that the tables are well aligned so that indeed PVsyst detects the pitch in bifacial window. Note that the amount of tables in the 3D scene will be double what you have defined in the system and this will create a warning. You can increase this limit in the advanced parameters. In the first PVsyst welcome window, click “Settings” and “Edit advanced Parameters” and find the parameter that triggers the error message – “Shadings: absolute maximum shading/field area ratio”. This will allow you to run the simulation Kind regards

With PVsyst version 7, it was an automatic mode for diffuse shading calculations for systems that involve trackers, in version 8 the automatic mode has been removed. Now, users are required to manually define a representative tracker for diffuse shading calculations. You define a representative tracker by clicking “Tools”, “Trackers diffuse shading definition”. In this tool you can choose to calculate the diffuse shading factor for all trackers, or select a representative tracker that will be used to evaluate the diffuse shading factors You can find more details about this update and instructions in the PVsyst Help documentation here: PVsyst Diffuse Losses with Tracking Systems. Indeed, many updates and improvements has been done since version 7.2.16 that especially concerning the near shadings. In general you can find the changes that has been done in the release notes and major changes are discussed in the forum in the links below: https://www.pvsyst.com/help/release-notes/index.html#exec-1--version-801 https://forum.pvsyst.com/forum/29-pvsyst-main-changes/

Hello, This limit that the error message is referring to is in the Project setting, not the advanced parameters. Kind regards

Please verify the Trackers diffuse shading definition in the Tools tab. If you are not using the All trackers option, verify that a representative set of trackers have been chosen.

Hello, In PVsyst version 8 you do not have any limitations of how many orientations you can define. Please update to the newest version. Kind regards

The backtracking is a strategy to avoid mutual shadings. Thus, in the morning and evening when the sun is low, as in your example, the trackers will avoid mutual shadings by tracking "backwards" . If you do not want to have this behavior, deselect the backtracking option.

Please update to the newest version If you must stay at version 7, you can mark all the tables and move the selection using the arrow, or define the height in the tools section:

Indeed, the loss fraction is set for STC (standard test conditions) and the simulation will be done in real conditions that will vary between sites.

Hello, I did a similar test in version 8.0.18 and is seems to work as it should on my side. The zone to the left is places 0.5m above the ground the the zone to the right 5m above the ground. If the issue persist, please describe further how to reproduce it. Kind regards,

Hello, The two locations to define the partitions are equivalent. If you change one, the other will update. The example below is from the DEMO tracking system Annecy with strings of 20 modules in 2P The partition model is intended to represent the stringing configuration. Therefore, if a table contains one string (e.g., 26 modules), you should define a single rectangle in length (Y-direction), since all modules are electrically connected as one string. If a table contains multiple strings, a separate rectangle should be defined for each string. For example, if a table has 52 modules—corresponding to two strings—you should define two rectangles in length.

Yes the number of sheds will have an impact of the performance, considering that the first and the last rows are not accounted for in the same way, since they will not experience the same shading patterns as the tables in the middle of the system. When there are many rows, this difference may be neglected. You can read more about the impact in the following help page: https://www.pvsyst.com/help/project-design/bifacial-systems/bifacial-systems-nbofsheds.html?h=number

Hello, In version 8 you can create multiple field types in the orientations window and assign different bifacial parameters to different sub-systems. Thus, even if the tilt and azimuth are identical, create 2 orientations and assign each orientation to a sub-array in the system window, corresponding to the two sub-systems with different pitch in the 3D scene. You find a similar example in the DEMO tracking system Annecy, variant VC5: 2 fields of Trackers with different pitch Kind regards