Number of strings parallel setting itself to 0 regardless of inputs

[sean.borley]

Hi there,

not sure whats happening but no matter how many strings im specifying pvsyst takes a few seconds to process what ive done then it sets the inverters to 1 and string in parall to 0 so i cant completer my simulation, any chance someone can help, not sure if its a bug from the recent update?

[André Mermoud]

You are using SolarEdge optimizers.

In the inverter’s list, you have probably modified the Inverters inputs, and the concerned sub-array is not connected to any inverter anymore.

If this is the case, please suppress this subarray.

[sean.borley]

hi there andre, i havent modified the inverters inputs, and even when i add an inverter for my new subarray it just keeps getting set back to zero

[André Mermoud]

Please open "Strings configuration" and click "Adjusts sub-arrays".

[sean.borley]

hi mate, even when ive tried to use the adjust subarrays it just sets itself back to zero for the new arrays regardless,

ive emailed you the export of the site to have a look at 

thanks

Edited February 16 by sean.borley

[André Mermoud]

Your variant VC3 is indeed very strange.  I don’t know how you got this situation.

 

For correcting this:  open  “Strings configuration“. Execute “Reinitialize inverter list” and then “Adjust sub-arrays”.

Then you come back to the Sub-Arrays definition.  You have now at the end of the list:

 

Delete each sub-array with a number of strings = 0   (use the bin in the menu of this frame), beginning by the last one.

Then the situation becomes correct. You can add new subarrays if necessary (button “Copy selected subarray”).

NB: this way of defining subarrays is not quite correct in PVsyst.

As all the inverters are identical, a better way would be to define one only subarray for each concerned configuration  (i.e. Number of optimizers – Orientation).

Then choosing “Strings configuration” =>  “Reinitialize inverter list”  will reattribute a string to each Inverter input in a more comprehensive way.

You should then execute  “Adjust sub-arrays”  if PVsyst requires it before exiting this window.