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dtarin

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Everything posted by dtarin

  1. Check if that is the case with fixed tilt tables. This feature was made well before we were able to model tracker tables independently and place onto terrain.
  2. Your screenshot is showing for a high voltage input (P in_DC, P Out_AC) in W
  3. For #1, we don't see the details on the OND file, but if you're using the PVsyst default and it is the same as shown here, then at unity power factor, you should be producing 110kW per inverter (run a simulation, check max inverter output in the excel hourly output file). The OND file shows 100kVA nominal, 110kVA max.
  4. The screenshot does not show all subarrays. Are all with 9 inputs?
  5. For 2 , you’re not adding inverters, you’re adding mppt inputs, which are fractions of an inverter. Uncheck that box to add whole inverters , or add the total number of mppt inputs to get one full inverter. You have 9 inputs, so 9 = 1 inverter
  6. That could be too high, degradation of albedo will mostly occur in the first 2 months to 1 year, and level off after that. It will depend on your roof, materials, location, weather conditions (i.e. rainfall), whether the white roof is new or pre-existing, etc. Look for studies on the subject.
  7. To do both simultaneously, 1) modify the OND file to the inverter limit, 2) set grid limit to limit at a second value at the injection point, account as a separate loss. You can also do all of this post-PVsyst without modifying the OND file, but you will need to account for the AC losses separately as well.
  8. Set to both nominal and max. Generally a limitation at the injection point supersedes, or is more common, than a limitation at the inverter. Setting an inverter limit means the inverters are being curtailed, and are being modified by the inverter manufacturer with an adjusted nameplate (they will be providing a letter to certify the new nameplate, etc.). It all depends on your project requirements, what type of installation, grid requirements, etc.
  9. This should be under 'How-to' or 'Simulations'
  10. Check your OND file. If on the Output Parameters tab, Nominal AC Power definition is set to Apparent power, you will need to select in Energy management > Power factor "inverter PNom defined as Apparent Power", and if applying a grid limit, on that tab, under specified power factor, select limit in active power
  11. Unlimited sheds are facing south, unlimited tracker at -22 are facing east.
  12. add dummy mppt to OND file, share the inputs in one of the inverters between two arrays with two different panel types. you will not have one module type per inverter.
  13. What you do in the shading scene will not change your system definition. You can define 80 modules under system, and production will be based on 80. Your shading losses will come from the shading scene and if you create a shade scene with 84 modules vs 80, use partial shading feature and only select the 80 modules you want to include in the shading. I would say though if the four modules are not casting shade onto other modules, then you wont need to place them in the first place.
  14. One additional request for the carbon emissions report, the units for energy don't change with the report options setting for units, would be great to have it change there also.
  15. It would be great if in the carbon balance menu (or the entire Economic Evaluation tool), EGrid wasn't fixed to the project and instead could be entered by the user. We don't always have complete losses in PVsyst and often post-process for additional losses and considerations, but could still make use of the economic evaluation and/or carbon balance tool if we could enter Egrid.
  16. Search "Batch mode - Parametric studies" in the help menu.
  17. Module temperature can be calculated, there are formulas online you can search. In PVsyst, there is an output variable called Tarray, in some places of the help it says cell temperature, and others, it says module temperature. It would be great to get some clarification here @Michele Oliosi.
  18. dtarin

    Group trackers

    Yes, there is a section where the trackers are listed, then below, the objects, then in a new section where zones and groups appear. Create a group then add trackers to it. Select the trackers then I think you right click the group and add to it.
  19. For why PVsyst shows 80 modules instead of 81, check the module spacing you have in whatever software is generating the PVC file, and what you have by default in PVsyst. If for example you are using PVCase with a module spacing of .01m and your PVsyst default is .02m, you will not get the same number of modules. This does not really matter though. PVsyst is calculating shading losses here, nothing else, so if the area of the tracker block in total is representative, then I dont think it matters if it says 80 or 81. The generation calculations are done based on the system definition, not by the module quantity in the shading scene. Try setting PVsyst default module spacing to 0.00 (X and Y), then reimport the PVC file.
  20. Set the partition and select all tables of the scene, and all tables will adjust even if you have 1, 2 or 3 string trackers. It will be defined based on the dimensions of the partition.
  21. Near shadings consists of beam, diffuse, circumsolar, and albedo losses. @PVsyst, circumsolar is missing from the help menu, see attached.
  22. It is indeed an OR function. You can apply your grid limit as defined in the menu at the inverter or the injection point after AC losses, but not both. To do both, export the 8760 and set different limits in excel: 1st at the inverter, then apply AC losses, then apply POI grid limit.
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