PVsystUser

- You are right, the terrain has been included in the scene and that's what is causing the issue. - PVsyst 8 crashes every time I want to import the scene and that's why I am using PVsyst 7.4 -I have shared the project and log with the support team 4 days ago, before writing here but it seems this chat was more helpful and thank you!

I haven't chosen a good word. Instead of "similar" I should have said why there are still shading when there is no tree. From your answer I realized that's might be the effect of backtracking. Although I am surprised because backtracking is activated in both runs and I have checked it few times. Could it be a glitch?

I ran a similar scene (the only difference is that Tracking plane, horizontal N-S axis instead of Tilted Axis) and no iso shading diagram is generated: But I don't understand how one has tracking plane as horizontal N-S axis and the otehr one has tilted axis?

I have the same exact shading scene one with 30m and 10 m tall trees and one without trees, why: iso-shading diagram has loss line in both variant and they are very similar ? why the avg axis tilt is different between two variant?

How does PVsyst handle inverter shutdown due to cold temperatures? Edit Query

In other words: 4.2% is a normal average of monthly losses. Shouldn't this annual average reflect the lower irradiance/generation during winter?

GlobInc has no relation to soiling. What I wanted to understand is how PVsyst calculates the yearly average "Soiling" from monthly values? For example, in January, we have an 11.8% soiling loss, but since January has low irradiation and thus lower generation, this 11.8% loss might actually be smaller in impact than a 6.8% loss in March. When we weight the monthly losses with GlobInc, the annual average results in 2.8%. However, PVsyst suggests an annual average of 4.2%. How does PVsyst calculate this annual average, and how is the lower irradiance during winter reflected in this calculation?

How does PVsyst calculate that yearly average? Starting from monthly loss and calculating the POA-weighted average the yearly value is much lower than what PVsyst offers. Example is here:

I saw the help page below but E_Grid calculated based on TMY which itself is a statics entity.

What could be the possible source of difference in P50 and E-Grid simul. here:

If EArray is effective energy at the output of array (and right before entering the inverter) Why the inverter loss over nominal inv. power should be applied on the DC side before entering the inverter?

I sent the project! Thank you Andre!

Thank you André! However I am a bit confused and your answer raised two more questions for me: Is there a place where we can define how the nominal power (PNom) of inverters is calculated? Is it the user that defines the clear sky model should be used? 2. In the quality check of my weather data there is no warning regarding clear sky model. Although the graph shows that there are months that my GHI is higher than clear sky model. Is the "Check data quality" enough for data quality check? (related screen shots below)

Hi, I have added storage to my PV system, the screen shot of storage windows are at the bottom of this message. Looking at 8760, there is a negative loss (or gain) while discharging, you can see it highlighted in yellow in the image below. This loss is added to the battery balance to get the discharged energy: EBatDis=EbatLss+SSOCBal What is the source of this negative loss or gain?