Zero Mass Water, an Arizona State University spin-off, has developed a “drinking water solar panel” which extracts water vapor from the air and condenses it into drinking water using electricity generated by the solar panel. This standalone system, which involves no wired or water input connections, has been undergoing pilot testing in homes since 2015.

Each 2.8 square metre unit generates electricity from a photovoltaic panel and uses that electricity to drive a cycle of condensation and evaporation that can produce 2 to 5 liters of water per day.