[E-grid hourly averages above AC capacity?]

On 5/9/2023 at 3:35 PM, André Mermoud said:

I don't know.

Please check that your inverter is not defined with an increased Pnom when the temperature is low  (page "Output parameters" of the inverter's dialog).

Thank you. I see this 

[E-grid hourly averages above AC capacity?]

Question: Why is that my energy output is going above the AC capacity at certain hours of the day in Jan, Dec, Nov?

DC: 96.85MWp

AC: 91.47MW

[IAM curve is highly overevaluated]

21 hours ago, Lazare Fesnien said:

The IAM model is defined with the PV module parameters, page "Additional data > Customized IAM".

Here you should define the glass surface type, and PVsyst will attribute the corresponding IAM model.

The PAN file of low light measurements, apart from the integration of this data, is extremely sensitive.

The reference is that at 200 W/m2, the real efficiency is -3%.

Dear Lazare,

Thanks for your answer. is that mean, these modules will perform badly at low light (200W/m2) i.e., late evening or night?

[IAM curve is highly overevaluated]

Hi,

• I added a PAN file that I received from a manufacturer into the PVsyst database.
• When I look into parameters by clicking on 'open', I see below window. 

I am curious to understand what does the BLUE  text implies? Why it is not showing for any other manufacture's' modules?

 

[climate onebuilding Meteo data]

On 3/30/2023 at 8:37 AM, Michele Oliosi said:

Hi,

I assume that the .pvsyst format is the same as our standard format: https://www.pvsyst.com/help/meteo_pvsyst_standard_format.htm

I think you can just add the extension .CSV to your file name. You can then import it via the home window > Databases > Known format, and choose PVsyst standard format in the list. You should be able to import your file.

 

Hi Michele,

Thank you for your help.

 

Ronald

[climate onebuilding Meteo data]

Hi,

• I have downloaded weather files from \climatewebsite\WMO_Region_5_Southwest_Pacific\MYS_Malaysia (onebuilding.org).
• Which consist of zip file with epw, wea, .pvsyst, etc weather files.

Can someone help or tell me how do I read EPW or PVsyst file?

[Hourly MW of Energy injected into grid]

Hi, @michele Oliosi,

Thanks for the answer. Yes, this was the problem/reason. 

[Non-Generating hours]

Mail failed. 

[Non-Generating hours]

Hi @Lazare Fesnien,

 

I have mailed it, please confirm if you have received it. 

[Hourly MW of Energy injected into grid]

@Michele Oliosi Thanks for your reply. Yes, I was able to do it. However, I see that some hours there is no 'generation' even though we have GHI. 

 

[Non-Generating hours]

[Non-Generating hours]

It has been observed that there are specific hours of the year when PVsyst does not generate energy despite the presence of GHI values.

[Total Land area estimation]

Hi

Thanks, but When I select bifacial tracking, pvsyst will not allow me to draw the layout right?

 

[Hourly MW of Energy injected into grid]

Hi all,

I want to export hourly energy generation, either MWh or MW, for all hours of the day in a year. 

I appreciate any help you can provide.

Ronald R

[Total Land area estimation]

Hi,

Pvsyst gives total module area based on number of modules. is there way to estimated total land area occupied by the PV plant?. Inclucing inter_row spacing area+module projected area?. 

[Dc to AC ratio]

Hi,

How do we size a system with higher DC to AC ratio (say 1.5). I have seen in some PVsyst reports by solar PV developers, they use higher DC to AC ratio. This is for maximum revenue generation. 

I want to learn sizing my system with higher DC to AC ratio

 

Thank you in advance for your help.