Inversion of extinction coefficient and refractive index of variable transparency solid–solid phase change material based on a hybrid model under real climatic conditions

•An inversion method is developed to inverse the optical parameters of VTSS-PCM.•A full-scale experimental platform is built and tested last for a year to collect the dataset.•The hybrid model is a combination of experimental data-driven and mathematical models.•The refractive index and extinction c...

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