Fresh water is becoming a scared resource worldwide (2.5% in total water).
Only 0.26% fresh water is accessible for living things.
However, major fraction is available in sea as salt water.
Desalination is done in many countries where fresh water is limited or not accessible. However, that process is very complex and expensive.
Reverse osmosis (RO) is commonly used in desalination of salt water and PV technology is well incorporated in such treatment process to manage water demand of world's population.
Steps are being taken for better improvement of automated PV panels for supplying electricity to desalination plants.