Clarification on "gamma_pdc"

[froggy555]

What does gamma_pdc mean? And how did you determine that this value must be between -0.002 to -0.005?

[dirkjordan]

gamma_pdc is the maximum power temperature coefficient. It is commonly found on module datasheets and is denoted by the Greek letter gamma. Values range typically from around -0.2%/Celsius (thin-film modules) to -0.5%/Celsius (very, very old crystalline silicon modules). Express the %/C as absolute number and one obtains the above range (-0.002)-(-0.005).

[froggy555]

gamma_pdc is the maximum power temperature coefficient. It is commonly found on module datasheets and is denoted by the Greek letter gamma. Values range typically from around -0.2%/Celsius (thin-film modules) to -0.5%/Celsius (very, very old crystalline silicon modules). Express the %/C as absolute number and one obtains the above range (-0.002)-(-0.005).

I see, but what does the gamma refer to ?

[cwhanse]

Traditionally, temperature coefficients for current are named alpha, and temperature coefficients for voltage are named beta. I suppose that's where gamma for power originates (third letter of Greek alphabet).

[mdeceglie]

Thanks for the question @froggy555 and for the responses @cwhanse and @dirkjordan . I'm going to go ahead and close the issue, but let us know if we can clarify anything.