I dance the dance of astonishment! Very interesting to see the relative efficiency curve as irradiance drops. One would have thought it was more of a straight line decrease.Oh.. I did just check QCells and the spec sheet does provide a graph.. I'm not exactly sure how to properly interpret it but looks like they are trying to represent what you are asking for:
My panels were manufactured by the Yoda Corporation.I’m sure some are better on cloudy days. Too hard to quantify.
Even with a 100% improvement, you’d just get 260 watts . Generator comes on or utility still has to help.
My q cells outperformed a coworker, but the next cloudy day he did better.
Cloudy with shadows, cloudy with no shadows, cloudy and rainy, cloudy and pouring, etc. Too many variables.
Not only what I like to see that graph go all the way down to zero, I’d love to have that curve in numerical format, so I can try to correspond insolation as reported by my WeatherStation to solar powerOh.. I did just check QCells and the spec sheet does provide a graph.. I'm not exactly sure how to properly interpret it but looks like they are trying to represent what you are asking for:
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You'll need the temperature coefficient as well.Not only what I like to see that graph go all the way down to zero, I’d love to have that curve in numerical format, so I can try to correspond insolation as reported by my WeatherStation to solar power
I don’t think that’s broadly possible …….without some extreme number crunching, data and computations to be meaningful. There’s just a lot of things that affect things they can’t know .Yeah but that is figuring for average good weather. Tells you nothing when the chips are down or when a Nor'easter is ripping through your neighborhood. Might need calibrated for your typical rain amount. Drizzle, Light rain, Steady rain, Raining cats and dogs, and Better build an ARK.
i just use the output of the panels as a crude measure of solation. My Davis weather station sells a meter but it does not seem worth the expense because I use Solar Assistant and get lots of data about Amps, volta and Watts from my panels.Does anyone have a light meter they can recommend to measure irradiance? I see them online but never used one. Would be handy when comparing panel outputs rather than saying "it was sunny out"
I have an Ambient Weather weather station and it reads irradiance in Wm/2. I don't know if it's super accurate, but it does. I have mine connected to weather underground publicly so I can go to my station on there and look at historical data and graphs.Does anyone have a light meter they can recommend to measure irradiance? I see them online but never used one. Would be handy when comparing panel outputs rather than saying "it was sunny out"
Overcast most of the day 66 panels at 3 PM sun comes out.It was a dark and gloomy day... My 3100w worth of panels this morning (10am ST) are putting out about 130w. Although not much it about equals my loads. 130w is around 4% of rating. Not enough power coming in to charge back my batteries from the nighttime deficit. But it is something.
It does make me wonder though if there are panel types that would produce more wattage even with low light daytime conditions. My panels are all mostly Mono with the exception of 4-100w poly. I have no Bifacial, half cut or use any optimisers. So what are the percents of rated wattage others are seeing during the less than stellar weather conditions?
Surely now that we have AI it should be a trivial problem to solve. Where is a 'bot when you need one?I don’t think that’s broadly possible …….without some extreme number crunching, data and computations to be meaningful. There’s just a lot of things that affect things they can’t know .
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AI, when you have to have an authoritative, unambiguous, and potentially wildly wrong answer immediately! I’d rather get my hallucinations from the Internet, at least then I know what to expect!Surely now that we have AI it should be a trivial problem to solve. Where is a 'bot when you need one?
Hmmm... seems 4% might be a good figure for what you can expect from regular solar panels on a dark and gloomy day.On a good sunny day my 2200 watts of panels can make 11.8kWh. On the darkest rainy day they made .36kWh, so about 4%?