In this article, the survey, description and perspectives of a new solar-based desalination technique - solar multiple condensation evaporation cycle (SMCEC) - are presented. This technique uses solar energy to heat brackish water and does not pollute the environment. Two pilot desalination facilities located in Sfax in the centre of Tunisia are the scope of this paper. The two facilities use the SMCEC technique but have different designs and equipment. The two units are operated under the supervision of the Ecole Nationale d＇Ingenieur de Sfax. The produced distillate water is used for drip-irrigation. Performance analysis showed as much as 60% of daily water needed for irrigation has been produced by the pilot units during good weather conditions.