Device pulls water from dry air, powered only by the sun. Under conditions of 20-30 percent humidity, it is able to pull 2.8 liters of water from the air over a 12-hour period.

See the source article by following the link below:
Device pulls water from dry air, powered only by the sun. Under conditions of 20-30 percent humidity, it is able to pull 2.8 liters of water from the air over a 12-hour period.