For the Detailed PV and PVWatts models in SAM 2025.4.16 r1, when weather file has invalid albedo values, error message is not clear:

Weather file albedo has 24 invalid values, using monthly value

Some files for new NSRDB Polar data have albedo values of zero for some time steps, e.g., TMY file for Kotzebue, AK, so it would be helpful to provide more useful information about problems with albedo data.