Containerized solar-PV reverse osmosis operated by the local community

Mechanism

Solar PV plus battery storage powers pumps that push seawater or brackish water through reverse-osmosis membranes inside a 20-foot shipping container, producing municipal-quality drinking water at high volume. Local staff are trained to run and maintain the unit day-to-day; water sales (e.g. via mobile-money payment) fund repairs and, ideally, replication.

Why it fits this issue

This is an existing, field-proven answer to the same problem the passive approaches target. It directly addresses throughput (where passive solar desalination is capped) and has a sustained field record. Its model of local operation plus sales-funded repair budgets is worth studying regardless of which technology is ultimately preferred.

Operating profile

• ~75,000 L/day, supporting ~25,000–35,000 people's drinking needs from one container.
• Capital cost ~US$0.5–0.57M per installation; built in ~1 month.
• Designed for a ~20-year service life with partial cost recovery from water sales.

Honest limits

• Capital and consumables: High up-front cost, plus RO membranes, filters, and batteries that foul or degrade and require an external replacement supply chain — the exact dependencies the maintenance sub-issue warns about. Long-term independent verification of sustained functionality across sites is thinner than launch coverage suggests.
• Brine: Standard RO discharges concentrated brine unless paired with a zero-liquid-discharge stage; the basic container model does not eliminate it.
• Skill dependency: Requires trained operators and an external repair fallback.