This supplementary material provides detailed information on the quasi-waffle solar distiller (WSE) for durable desalination of seawater. The WSE is designed to efficiently evaporate water and desalinate seawater using solar energy. The study includes various figures and tables that illustrate the performance of the WSE under different conditions, such as varying solar flux, different shapes of solar evaporators, and different concentrations of NaCl solutions. The WSE demonstrates high evaporation rates and effective salt rejection, even in real seawater. The study also includes a detailed analysis of the Marangoni effect, which plays a crucial role in enhancing the evaporation and desalination processes. The Marangoni effect is influenced by both concentration and temperature gradients, and the study provides theoretical models and simulations to understand these effects. The study also discusses the energy utilization efficiency of the WSE, including the calculation of solar-to-steam efficiency and the analysis of heat loss during the evaporation process. The numerical simulations of the evaporation process are based on governing equations for mass, momentum, and energy conservation. The study also includes a detailed analysis of the numerical simulation of evaporators, including the calculation of evaporation rate, saturation vapor concentration, and heat of evaporation. The study provides a comprehensive understanding of the WSE's performance and the underlying mechanisms that contribute to its efficient desalination of seawater.This supplementary material provides detailed information on the quasi-waffle solar distiller (WSE) for durable desalination of seawater. The WSE is designed to efficiently evaporate water and desalinate seawater using solar energy. The study includes various figures and tables that illustrate the performance of the WSE under different conditions, such as varying solar flux, different shapes of solar evaporators, and different concentrations of NaCl solutions. The WSE demonstrates high evaporation rates and effective salt rejection, even in real seawater. The study also includes a detailed analysis of the Marangoni effect, which plays a crucial role in enhancing the evaporation and desalination processes. The Marangoni effect is influenced by both concentration and temperature gradients, and the study provides theoretical models and simulations to understand these effects. The study also discusses the energy utilization efficiency of the WSE, including the calculation of solar-to-steam efficiency and the analysis of heat loss during the evaporation process. The numerical simulations of the evaporation process are based on governing equations for mass, momentum, and energy conservation. The study also includes a detailed analysis of the numerical simulation of evaporators, including the calculation of evaporation rate, saturation vapor concentration, and heat of evaporation. The study provides a comprehensive understanding of the WSE's performance and the underlying mechanisms that contribute to its efficient desalination of seawater.