Error sushine hours

[CarlosLSev]

Hello, in summer it seems that my hours of sunshine are fine, but in winter they are not, what is the problem?
https://www.meteoviso.es/wxgraphs.php?lang=en

Screenshot_2024-12-03-16-14-03-929_com.android.chrome.jpg

[mcrossley]

Have you calibrated your theoretical value (Bras in this case) for winter and summer readings by comparing its graph plot against the sensor value?

Ideally you need to do this mid-summer and mid-winter (so now) to adjust the turbidity factors for the two extremes.

You need clear cloudless days to perform the calibration and get nice plots. Around mid-day tweak the turbidity factor for Decemeber until your sensor reading is a few percent below the theoretical value.

[CarlosLSev]

Hello, I don't know how to do that, although I will investigate it, even so if you give me a suggestion I would welcome it.