I came to Ketura to write my Master thesis about a solar desalination project of my university in cooperation with the Arava Institute. This topic has attracted attention in recent years due to an increased global demand for drinking water, and the ongoing pollution of existing fresh water sources. The experimental setup at the Institute consists of a photovoltaic thermal hybrid solar collector and a reverse osmosis unit. The energy used to desalinate brackish or seawater is stored in a battery that is supplied by the photovoltaic cells. The idea behind the project is to simultaneously preheat the feed water and cool the solar panels, as photovoltaic cells show a higher efficiency at lower temperature. The water used to cool the solar panels is then used as feed water. Increased input temperatures enhance migration processes and therefore guarantee a higher fresh water output.