Hi Vadim,
Thank you for bringing this to our attention and following up with the file. This is a bug that we will fix for the first update to SAM 2021.12.02, which we hope to release by mid-February.
github.com/NREL/SAM/issues/918
You can work around this issue by setting the number of time series battery environment temperature values equal to the number of time series load data time steps, and setting all of the temperatures to the same value:
1. On the Battery Cell and System page, under Battery Thermal, choose
Enter time series temperature for the environment temp option.
2. Click
Edit array and then
Change time step, and set the time step to the same time step as the load data.
3. Click
Export, and export the data to a text file. You can any file extension, for example, .txt or .csv.
4. Open the file in a text editor or spreadsheet program, and replace all of the zero values with 25, or whatever constant temperature you want to use for the environment temperature, and then save the file.
5. In SAM, click
Import to import the data from the modified file.
Best regards,
Paul.