#off-grid-desalination

The evidence is a 9 cm² panel run for ~9 hours outdoors and a lab unit run for 7 days. Real deployment needs square-metre panels surviving years of seawater: aluminium corrosion, biofouling, laser-texture wear, mechanical robustness, and field salt-harvesting are all untested.

Solar evaporation yields ~10 L/m²/day outdoors—near the physical ceiling, not an engineering gap. Full domestic use (~50–100 L/person/day) requires 5–10 m² per person; a 10,000-person town needs 5–10 hectares. This bounds the technology to household/hamlet scale, not municipal su

Coastal, island, and remote communities sit beside seawater but lack safe drinking water. Conventional desalination (RO, thermal) requires reliable power, capital, trained technicians, and supply chains they don't have — and discharges brine that harms local ecosystems.

A black-lined basin of saltwater under a sloped glass cover: sun evaporates the water, it condenses on the glass and runs off as distillate. No moving parts, no consumables, repairable with local materials — but output is ~4–6 L/m²/day, so area demand is the binding constraint.

A shipping-container RO plant powered by solar PV and battery storage, producing ~75,000 L/day for ~25,000–35,000 people, operated by trained local staff and partly funded through water sales. Capital cost ~US$0.5–0.57M; ~20-year service life.

First large-scale solar desalination plant, built in the Atacama Desert to supply freshwater to a saltpeter/silver mining community and its draft animals using highly saline mine effluent (~140,000 ppm) as feed. The ins…

A containerized solar-PV reverse-osmosis plant installed in 2018 in Kiunga, a remote coastal fishing community south of the Somali border, where residents previously relied on brackish, contaminated water. Solar panels…