I have a question for you about this part of your post. Its entirely possible I have a misunderstanding about how LED's and CC/CV power supplies work, so please correct me as needed. I have been messing with electronics stuff for many decades as a hobby, but I am NOT an electrical engineer and Im a long ways from an expert on LED's
I'm wondering how you got the current and voltage numbers at the end of that quote. I follow the math you used, but I didnt think that was exactly how CCCV drivers and LED's work together.
Im trying to predict what power usage Im going to have at various settings with the Solstrip/driver parts I just ordered, so thats why I am asking.
Its been my understanding that these power supplies are constant voltage and constant current. Every similar CCCV power supply I have used in the past could be operated in both modes depending on how it was used. I cant find a user guide for the Mean Well's that goes into the details of how to make the adjustments, so I am just guessing here, but what I did see does say it has a CC "voltage range" and a CC adjustment as well as a voltage adjustment. In other words, these drivers will operate in CC mode as long as you are within the 'voltage range'.
With my other CCCV supplies, you can set them to be in CC mode or CV mode. Since these boards dont use any resistors or zener diodes, etc, I would think they have to be operating in CC mode? I was under the impression that was the only safe way to run a direct driven LED to prevent thermal runaway.
Thats a lot of verbage to say I assumed these drivers would be operating in constant current mode?
That brings me to the second thing that has me confused about your numbers - the graph you posted above showing voltage vrs current for these LED's. Looking at that graph, I dont see how you can get the currents you listed at the voltages you show. I have always understood that if you apply a given voltage to an LED it will draw a specific current. That relationship is shown in that graph you posted which I will post again to make it easy.
Looking at that graph, if you apply 3 volts to one of these LED's, you should get a tad under 200 ma - or looking at it from the other direction, if the LED is drawing 200 ma, the voltage drop will be 3 volts.
At the 2.75 volt level, the amp draw drops to about 50 ma - or at 50 ma draw, the voltage drop will be 2.75 volts.
So, if that graph is correct, I get very different numbers from yours for min and max watts.
.05 x 2.75 = .1375 watts min
.2 x 3 = .6 watts max
In doing the same checks on my setup I get the following numbers. I ordered the 320 version which has a min max current range of 12v to 24v and current range of 6.67 to 13.34amps.
With 6 panels, my max amp draw is going to be 13.34 / 6 = 2.2 amps per board. With 12 parallel sets of led's thats .185 amps/led. Looking at the graph again, that works out to roughly 2.98 volts or .55 watts per led x 98 led's = 52.9 watts max per board x 6 boards = 317 watts total. Thats great because that driver is max 320 watts.
My minimum however is zero watts. If I turn down the voltage to 12 volts, that below the minimum voltage for the led's, so they wont light up at all.
If I stick with the minimum amps in CC mode at 6.67amps / 6 boards = 1.11 amps per board or 1.11 / 12 = 93 ma per led. Looking at the graph again, when drawing 93 ma, they will be at roughly 2.83 volts, so my minimum 'operating' power will be roughly .93 x 2.83 x 98 = 25 watts per panel x 6 panels = 150 watts total.
Or.... am I completely misunderstanding how this works?