There seems to be an issue with solar radiation data imported into WeatherTool from Meteonorm, and possibly EnergyPlus.

Attached are two images of the solar radiation graph for Munich, the first from Metonorm imported data, the second being the WEA file included with WeatherTool. As can be seen, there doesn't seem to be any co-relation between these graphs.

The same also seems to happen with climate data imported from an EnergyPlus EPW weather file. This occurs whether the data is converted to the WEA format using either WeatherTool or the EnergyPlus conversion tools.

Oliver Hans originally brought this issue to my attention. He as also looked further into the matter, and believes that there seems to be some kind of multiplier being applied to the direct solar radiation values, somewhere between 2.0-2.5. Please find screenshot attached.

I don't know if this is a data conversion issue, or if there is something wrong with the data itself.

Kind regards,

sid.