Questions Regarding Inverter Clipping and Module Temperature Settings in PVsyst

[Alex.el-mor]

Dear PVsyst Support Team,

I am currently working on two ground-mounted PV sites, and I have encountered two different issues during the simulations:

1. Inverter clipping time – In one of the sites, the inverter reaches clipping quite early, around 11:30 AM.
   Is there any way within the simulation settings to define or adjust the specific time when inverter clipping occurs?

2. Module temperature limitation – In another site, the module temperature exceeds 45°C, which significantly reduces the system’s performance.
   Is it possible to set or limit the module’s maximum temperature within the simulation parameters?

Thank you in advance for your assistance.

[Michele Oliosi]

Hi, these two factors are directly related to the components in your system as well as the weather. 

Directly setting a clipping time or a maximum module temperature would be unrealistic, and is not possible in PVsyst.

Instead, you can consider changing the components such as changing inverter model or PV module, or also changing the system layout.

[Alex.el-mor]

Hi Michael,

First of all, thank you for your response.
Unfortunately, in both cases, the system has already been installed, and I don’t have the option to replace the equipment.
It might be worth considering adding this function in future versions.

[Michele Oliosi]

Glad to help !

I see, however I still fail to see the purpose of this request, sorry. If the inverter clips at a given time, this means that at that time the PV production reaches the clipping threshold at that time. If you model the PV production based on the measured data (not from a TMY), the clipping time should at least roughly correspond to the reality. 

Same thing with the module temperature, if you were to model using the real historical weather data, the temperature of the modules, measured and simulated, should at least roughly match.

Let us know if I missed something about your intentions with the simulation.