[[Image:naiade1.jpg|thumb|right|150px| The Naiade water purification unit used in India. Note the PV panel above the unit.]]
[[Image:naiade2.jpg|thumb|right|150px| The Naiade water purification unit.]]
The Naiade is a stand -alone water purification unit. The unit is powered by a solar panel, which is integrated in the unit. The capacity of the unit is up to 3,500 liters per day.
====Principle of operation====