Weather file shows beam radiation when ladybug predicts sun is below horizon?

[charlie.brooker]

Hey @Rory, welcome to the forum!

I’ve only had a quick look at your script, but I suspect the reason is something to do with this thread:

Comparing different TMY/EPW providers : inconsistency of data?

Hi @lionpeloux - how did the Oikolab data compare? There is a lot of technical details in the data source that you’d want to consider, rather than simplly ‘trusting’ a source. Radiation data for Climate One Building, JRC, Shiny, and Oikolab are all mostly based on ERA5 reanalysis dataset (JRC also uses NSRDB and SARAH2). We (Oikolab) provided the raw ERA5 data to Climate One Building but not sure how the data was compiled into EPW file. Note the EnergyPlus file for Lyon is mostly from 1980’s …

All of the HOYs you’re reporting are in the morning, so maybe something like the sun is below the horizon at 7am, but then the epw records radiation for the period 7-8am…?