Probability issue P50-P99 for different years

[SNFV2711]

Hi
I am having issues with a project I m working on. 
I need to get P50, P75, P90, and P99 for a 320 MW design for a period of 15 years. I had read the help article about how PVsyst computes the distribution, yet I am not sure if it is safe to run the degrading tool at 3 years range and use the PR reduction as my correction factor or if running every year on its own is a must. 

The second option is the optimal solution but it takes a lot of computing power and time, which makes me consider this trade-off.

Thanks for your help beforehand!

[dtarin]

Use whatever method you have for degradation, take the P-factors for each Pxx and multiply the resulting data by them to get your Year N @ Pxx data.

Edited May 27, 2022 by dtarin