[Vmp and Imp RMS disperion values (Ageing tool)]

On 11/25/2022 at 8:21 PM, Lazare Fesnien said:

Hi,

You can account for the aging of the PV modules in ‘Detailed losses -> Aging’. This allows you to make a simulation for one specific year of operation. You can also make multi-year simulations in ‘Advanced simul. -> Aging tool’.

PVsyst will not change the nominal power of the PV modules, but simulate with a model of degraded PV modules. This means that the performance ratio PR will decrease with time, since nominal power stays the same, but effective generated power will decrease.

The aging of inverters is not modeled in PVsyst.

For more explanations on how to use the aging tools of PVsyst, please see the corresponding help page : https://www.pvsyst.com/help/ageing_tool.htm

What do these values (Vmp and Imp RMS dispersion)  represent, and what is the process for determining them? Is it possible to optimize these values, and if so, how can they be improved?

[Performance Ratio]

Why is the annual PR not  the average of the monthly PR?