Slower execution time in new version

Hello,

I recently update SAM to its newest version (from 2020.2.29 to 2021.12.02) and I noticed that the execution time is now much higher. From the notice tab, after running a simulation, I read a total time around 1000ms, where it used to run under 200-250ms in the previous version.

Is this normal, maybe I should adjust a parameter ?

Thanks, with regards,
Florian.

Hi Florian,

Some of the battery dispatch code updates may cause some configurations to run slower. Can you tell me what kind of system you observed these results for?

Best regards,
Paul.

Hi Paul,

I'm running a detailled PV - no financial model. I checked "estimated subarray 1 configuration" and used a standard self shading.

Thanks for your answer, best regards,
Florian

Hi Florian,

Thank you for the additional information. I was able to confirm your observation on my computer:



I think the longer simulation run times for a Detailed PV / No Financial case between SAM 2021.12.2 r2 and SAM 2020.2.29 r3 are due to improvements to the backtracking algorithm and, for subhourly simulations only, the addition of a new transient thermal model for cell temperature calculations. These changes are described in the release notes for SAM 2020.11.29: nrel.github.io/SAM/doc/releasenotes.html#2020-11-29 .

I will check with the model developers and follow up if they have any additional insights.

Best regards,
Paul.

Paul,
Thanks for those precisions. It's important for me as i run multiple simulation into with a script : I will probably run SAM 2021.12.2 with user entered specification for the module if needed.
Thanks again for your time ! I'll be listening if you find a way to improve SAM 2020.2.29 running time.

Best regards,
Florian