March 25, 20215 yr Totally cloudy day today in Jhb. Sun was out for 2 mins and production from a 9360w array reached 10400w.
March 25, 20215 yr Probably a combination of low temps and cloud edge effect - but it's always great to see more coming out than you paid for! 😀 Although I've still never got a better total for the whole day when it's cloudy/cool vs clear/hot...
March 25, 20215 yr 2 hours ago, leshen said: Sun was out for 2 mins and production from a 9360w array reached 10400w. You're gonna bend that needle! 😉
March 25, 20215 yr Author 1 minute ago, Coulomb said: You're gonna bend that needle! 😉 Lol amazing what cold panels can do
March 26, 20215 yr 18 minutes ago, Adri said: What are "çold panels" ? How do they differ from conventional PV panels? They are PV panels but because of the rainy/cloudy weather, their temperature is cool/cold when compared to when it is sunny 😉
March 26, 20215 yr Further to this. I see MANY rooftop installations where the installer has mounted the panels less than 200mm from the roof surface. These panels generally overheat and will deliver sub-par performance. Most of my installations are free-standing so that the air can circulate freely and the panels stay cooler.
March 27, 20215 yr On 2021/03/25 at 1:11 PM, leshen said: Totally cloudy day today in Jhb. Sun was out for 2 mins and production from a 9360w array reached 10400w. Did you happen to take note of the change in voltage between warm and cold panels? Here you get almost 15% more power, so presumably this gain is split between voltage and current increase. It will be interesting to see how much this can increase the Voc so we get an idea of how much room we need to leave so we never hit the inverters max voltage.
March 27, 20215 yr Author 35 minutes ago, Paul Greeff said: Did you happen to take note of the change in voltage between warm and cold panels? Here you get almost 15% more power, so presumably this gain is split between voltage and current increase. It will be interesting to see how much this can increase the Voc so we get an idea of how much room we need to leave so we never hit the inverters max voltage.
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