dtarin

Typically by users. It is a custom field, so use it as you need to. Whether or not there is a specific label in the software does not matter. The software takes all uncertainties entered and combines them (square root of sum of squares). The label you give it shows up in the report.

This is typically added under the custom field and renamed. All fields should be set by the user, and not dictated by the software as it is site and project specific.

The justification is that when performing calculations, as you have found, a negative number can lead to negative generation. While PVs plants do have negative generation at night (i.e. transformers, fans, etc.), it is not coming from irradiance or the modules. The last part was with reference to the forum topics and organization. This is a general question and would be better suited for the how to or meteo data forum categories.

Irradiance sensors sometimes (or often) report negative values. Set these to zero to resolve your issue. Also, this is the suggestion thread for suggesting features or changes to PVsyst.

Hello, It would be useful if PVsyst output an 8760 variable which shows whether backtracking is activated or not for each hour. This is used for analysis outside of PVsyst. Thanks.

As you approach the equator, the sun is more directly over the modules. This is to be expected. Not only will the optimal tilt reduce as you move closer, but as you have identified, so will the transposition gain.

For low values, this is expected. A screenshot would help provide more information.

I don't know this inverter specifically, but with other string inverters I have worked with, the inputs can be 'jumpered', so that power is shared across all inputs. Power sharing emulates this behavior. Select "use the sharing...." and select all four sub-arrays onto one Inverter config, then press All PNom ratios identical. Since it looks like you have done that (all have Pnom ratio the same), you should be good.

After having a second look (and since I can't edit), use power sharing for sub arrays 2-5 and balance the DC/AC ratio across all inputs.

The DC/AC ratio is very high, to the point that the inverter manufacturer may not warrant the product in a PV-only system. The maximum DC/AC ratio according to the datasheet is around 150%, or 1.5, which is fairly common. Is this a DC-coupled battery system?

My comment for #1 is that 0.02% is in the noise. I don't much for #2, but you can always rename them in windows explorer without having to rename one at a time in PVsyst.

Phi limits are set under orientation menu.

Backtracking angles (Phi) and Tilt are two different things. The list you have there is showing tilt in the N-S direction, and this is a static number that doesnt change. The tracking method and phi angle range are set under orientation menu. PVsyst does not allow for custom backtracking angles, only what is included in the software. T

You can change your timestamps and import "10 hours" of data, and then change the timestamps after simulation to minutes.

You AC power at the inverter is less than your POI rating, so you wouldnt see any losses show up under grid limitation. I don't see much inverter clipping losses though, is this a low irradiance, fixed-tilt site? Set your POI rating lower for a quick test.

Soiling is irradiance weighted. There is more production in the summer months when your soiling rate is higher. Non-uniform soiling rates will not equal a straight average in many cases.

Increase tolerance to 20 degrees, press identify.

The central gap in PVsyst is for 2P trackers, and defines the spacing between the two modules in portrait. It does not define gaps for motors or bearings .

Modify the ond file and reduce the number of mppt inputs. Save this as new file.

Screenshot looks correct…

Are they measured in feet?

Yes, for wind speed as well.

It is the average temperature for the entire month using hourly data. You can export the data to csv and confirm under Advanced Simulation.

You can export all of the necessary variables to determine what you have requested under Advanced Simulation. Select the required variables, and the software will export the data to a .CSV file. From there you can calculate what you need on a monthly basis. I dont know what peak capacity or export capacity mean, perhaps max instantaneous output power? A standard TMY weather file is a P50 simulation. Unless you have specifically a P90 weather file, you will need to calculate P90 from the P50 yourself.