Hi,
I got a question of one of my visitors I don’t know the answere to.
Maybe there are some people here you can shine a light on this matter I am not familiar with.
He is comparing my solar data (day/month) with the productivity of his solar panels.
I am using the tag $todaysolarhrs for that and using a WeatherFlow Sky to monitor solar.
His question is this.
If you have a solar sum of 500 on Monday and a solar sum of 1000 (that is J/cm2, not kWH but that doesn’t matter.) on Tuesday.
Would the productivity of his solar panels be twice as much on Tuesday than it is on Monday.
TIA
I’m not sure I understand the relationship between Solar Hours (hours of Sunshine above the threshold you’ve set in WD, which is a percentage of Wm2 based on the estimated maximum for your location & date) and J/cm2, which I take it is output of his solar panels.
Assuming his measurement of J/cm2 is linear, then I would have thought 1000 J/cm2 would have been double 500 J/cm2. But this is only a guess.
To my knowledge $todaysolarhrs outputs kWh/m2 which I converted to J/cm2.
You have to multiply by 360.
The unit J/cm2 is commonly used here in my agricultural area.
We call that the “stralingssom”.
Take a look here in this:
Weerstation Westland - De Poel - Maand- en Jaar Overzichten
Sorry, you are correct, $todaysolarhrs does output kWh. I got it confused with Sun Shine Hours.