K instead of C for Temperature Coefficient!?

[MiDri]

Normally I see this

but Hyundai is listing theirs with K!?

 

[pvgirl]

Since 1 kelvin is that same as 1 degree celsius, they are the same unit, and can be used interchangeably in calculations.

 

[400bird]

Well, 1 Kelvin is -272 Celsius but at least 2 Kelvin is -271 Celsius.

Luckily, none of that changes the math for PV temperature calculations.

 

[Shimmy]

It just keeps people from doing stupid things like 25°C - -20°C = +5°C.

 

[glandpuck]

Most panels start with an ambient rating at 77 degrees fahrenheit. So in the morning, if your panels start producing energy when the ambient temperature is 10 degrees F, your panel surface may be at that 10 degrees or warmer in the sunshine. But, to illustrate, take 77 -10 is a temperature differential of 67 degrees F. Take 67 x 5 / 9 = 37.22. This is the degrees in C below the 77 in F. Your Voc is .306% x 37.22 = 11.38. So your Voc would be 11.38 volts higher. If you had 3 panels in series, it would be 34.17 volts higher.