During six-month trials in New Mexico, the system harnessed 94% of the energy generated by the solar panels, maintaining a constant production of drinking water even with fluctuating weather, producing up to 5,000 liters of drinking water per day without the need for batteries or an external power source.

It looks like it’s just a test/demo of plumbing reverse osmosis desalination directly into solar power. I’m guessing there is mechanical energy buffering in the system, meaning that batteries aren’t required to smooth power flow out.