Parameters for Advanced Module Technologies

[Asaad]

Hello,

When modeling advanced module technologies like HPBC, PERC, TOPCon, HJT, IBC, or Perovskite/Tandem in PVsyst, should I adjust these parameters?

Module Mismatch Losses: Currently set to 1%.
String Voltage Mismatch Losses: Currently 0.1%.
Module Quality Loss: Default.
LID Loss Factor: Set to 0% for N-type modules.
For example, HPBC claims better shading performance — can mismatch losses be reduced? Are there other parameters I should modify to better reflect these technologies?

Thanks for your advice!

[André Mermoud]

Some answers to your questions:

Module Mismatch Losses: Currently set to 1%.  - This depends on the sample of PV modules you are installing. Not on the technology.
String Voltage Mismatch Losses: Currently 0.1% - Idem, by the way this is an extremely small correction..
Module Quality Loss: Default. - This is a parameter at your disposal. You can put here what you want. But the default is based on the tolerance, it doesn't depend on the technology.
LID Loss Factor: Set to 0% for N-type modules. It is indeed null for N-type cells. Otherwise the value should be set according to the manufacturer if available.
For example, HPBC claims better shading performance — can mismatch losses be reduced? - This is indeed implemented in the ModuleLayout calcuation. But don't wait for a significant improvement of the shading loss !  (see the Help  https://www.pvsyst.com/help/physical-models-used/pv-module-standard-one-diode-model/pv-module-reverse-lowvoltage.html?h=ibc

Are there other parameters I should modify to better reflect these technologies? - If modifications are necessary, they will be in the PV module definition and modelling. We  are currently  studying this but we don't have definitive conclusions yet. The main workaround we can propose in the present time is to increase the Voc specified at STC when you cannot establish the one-diode model (i.e. when the RSerie cannot be specified for the required low-light performance).