How does HB+ generate .wea from .epw file ? Does it use direct normal or direct horizontal radiation?
But, even either of them, diffuse horizontal radiation should remain the same between epw and wea file which I found significant discrepancy here in case of Melbourne climate. In the upper image shows direct normal and diffuse solar radiation from epw file, while the lower image shows the generated .wea file. If you compare the first hours you see they are not the same, in which they have to be the same. Both time steps are for one hour.