for CuGaS 2 electrodes, where the C SS dominates in certain potential ranges and leads to significant, non-linear, and non-trivial deviations from the ideal MS behavior. The importance of the different capacitive contributions to Eq. ( ) and ( ) depends on both the electrode material, electrolyte, and the electrode potential. For SCEs, C DL ≫ C SC is often observed and the contribution of the double-layer capacitance is often neglected. For metallic electrodes the opposite is true and C DL ≪ C metal , and it is enough to consider just the double-layer capacitance. However, general models of the semiconductorelectrolyte interface capacitance require accounting for all the contributions of C SCR , C SS , and C DL . From the DFT perspective, this means that convergence and extrapolation to the thermodynamic limit need to be achieved for both the surface size and the SCE thickness. As of yet, we are not aware of any DFT studies or atomistic models that would have successfully repro-duced the complex SCE capacitance. Resolving this issue requires adopting and refining the atomistic models of the SCEs as well as experimental capacitance measurements on well-defined electrodes to understand the SCE capacitance and to establish the accuracy of the capacitance models.