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Maps of annual estimated spectral factors (SF) for different PV technologies across Brazil: monocrystalline n-type silicon heterojunction interdigitated back contact (Si HBC); 2T perovskite/silicon tandem (Tandem); thin film cadmium telluride (CdTe), and thin film perovskite. Black dots indicate the locations of measurement stations used to extract TMY data. Interpolation and extrapolation were applied in data-sparse regions to provide a complete spatial representation of spectral effects. Different colour scales were used across subplots to highlight spacial variations for spectral effects within each technology, which should be considered when interpreting the maps and comparing PV technologies (Adapted from Marilia Braga PhD Thesis).