Daily Kos - MIT engineers have invented a new desalination machine that runs on solar energy. The project began in 2013 when the engineers went to India with the hopes of helping poorer villages and townships with their drinking water.
Business insider - The group came up with a method that uses solar panels to charge a bank of batteries. The batteries then power a system that removes salt from the water through electrodialysis. On the most basic level, that means that dissolved salt particles, which have a slight electric charge, are drawn out of the water when a small electrical current is applied. In addition to getting rid of salt (which makes water unusable for crops and for drinking), the team also applied UV light to disinfect some of the water as it passed through the system.