A new solar desalination system takes in saltwater and heats it with natural sunlight. The system flushes out accumulated salt, so replacement parts aren’t needed often, meaning the system could potentially produce drinking water that is cheaper than tap water.
The part I found most important:
“The researchers estimate that if the system is scaled up to the size of a small suitcase, it could produce about 4 to 6 liters of drinking water per hour and last several years before requiring replacement parts. At this scale and performance, the system could produce drinking water at a rate and price that is cheaper than tap water.”
That could legit provide potable water for an entire house, with water to spare
If the parts are user-replaceable, that makes this invaluable for places like Polynesia where fresh water is becoming harder to acquire and people often live in remote small communities.