Minor correction/note: most modern modules/cells have a temperature coefficient in the range of approx. -0.27 to -0.35%/°C. A little better than -0.45%.
See fig 14 in [1] for data through 2021/22, and then the more recent transition to n-type cells is helping more [2]. This database [3] doesn't list module release date, but filtering for modules with STC rating over 500 W (decent proxy for "modern") gives an average of -0.34%°C, with a lot at or better than -0.30.
See fig 14 in [1] for data through 2021/22, and then the more recent transition to n-type cells is helping more [2]. This database [3] doesn't list module release date, but filtering for modules with STC rating over 500 W (decent proxy for "modern") gives an average of -0.34%°C, with a lot at or better than -0.30.
[1] https://www.ise.fraunhofer.de/content/dam/ise/de/documents/p... [2] https://www.nrel.gov/docs/fy22osti/82871.pdf [3] https://github.com/NREL/SAM/blob/patch/deploy/libraries/CEC%...