Solar-Panel to Controller Loss
Much has been made of the lower losses on the panel to controller path with MPPT because the amps are less. So once you have your loss measured, how valuable is it to improve on that if you don't lik...
Forum Discussion
BFL13 wrote:
The thing now is the stupid NOCT rating they give goes with 800 thingies. But my panel was at NOCT doing 1000 thingies, so the NOCT specs are useless.
So if you are at 1000 thingies, use the voltage drop coefficient for the temperature 45C vs 25C (twenty times) and do that to get your presumed panel wattage and ignore the stupid NOCT values they give.
How many times will you ever see NOCT and 800 at the same time? Totally useless!!! :(
thingies = W/m2 irradiance
NOCT wrote:
Under Normal Operating Cell Temperature, Irradiance of 800 W/m 2 , spectrum AM 1.5, ambient temperature 20 °C ,
wind speed 1 m/s
STC wrote:
Under Standard Test Conditions (STC) of irradiance of 1000W/m 2 , spectrum AM 1.5 and cell temperature of 25°C
How can you be a NOCT doing 1000 thingies?
And how are you measuring irradiance?
