A multi-stage solar panel that turns seawater into potable water using nothing but the sun.
No electricity. No filters. No chemicals. No moving parts.
How it works Get launch updatesThe "multi-stage" part isn't marketing. It's latent heat recycling — a real, measured thermodynamic effect that MIT demonstrated in a peer-reviewed paper in 2020 and improved on in 2023.
Most solar stills only work when the sun is shining directly on them. Marisoli's top surface is engineered to do three jobs at once — using the same collection system, the same panel, no mode switching.
Cloudy days hurt distillation — and help dew collection. Rainstorms hurt both — and feed the rain channel directly. The three modes are naturally complementary across every weather condition.
Same core physics, three form factors. Emergency, household, and community-scale.
Folds flat. Under a pound.
A 3-stage flexible laminate designed for life rafts, disaster kits, and backpacks. Unfolds on seawater or a tidal pool. A brief freshwater rinse every few days resets the wicks and returns it to full performance.
Rooftop. Snap-fit. No tools.
A rigid 10-stage panel that provides a family's daily drinking water. Injection-molded HDPE frame, aluminum condensers, slide-in replaceable cotton wicks. Optional limestone cartridge adds back minerals for taste.
Manifolded. Gravity-fed.
Panels connect via standardized quick-fit manifolds for shared feed and collection. Elevated storage enables gravity-fed distribution. One trained local operator maintains the whole array.
*Production figures are per 1 m² collector area under tropical coastal solar conditions (5–6 kWh/m²/day insolation). Peak sunny days in high-insolation regions can exceed these ranges. Output scales with solar resource, ambient humidity, and operating temperature.
The value isn't price per liter against municipal water. It's water production where no infrastructure exists — with no fuel, no spare parts, and no specialist labor.
The ~40% of humanity that lives near a coast but not near potable water infrastructure. Small islands, fishing villages, remote shorelines across the tropics.
Hurricane response, tsunami aftermath, refugee camps near brackish water. Deployable by anyone, no power required, nothing to refuel. Sits in a kit for ten years and still works.
Life rafts, long-distance sailors, scientific field stations, expedition teams. The emergency pouch belongs in every offshore safety kit.
NGO and aid distribution at wholesale pricing. One-time capex versus recurring trucked-water OPEX. Operable by community health workers with icon-based instructions.
Runs entirely on sunlight. No solar panels, no batteries, no generators. Works anywhere the sun shines on saltwater.
Snap-fit assembly. Slide-in replaceable wicks. A child can set it up. A grandmother can maintain it. Instructions in icons, not text.
Every component is specified by function, not by brand or exact material. Any sufficiently transparent cover. Any absorbent wick. Any thermally conductive plate. Substitute freely with what's locally available.
Based on multi-stage passive solar distillation research published by MIT and Shanghai Jiao Tong University. Independently validated physics. Provisional patent filed on the specific engineering and form factors.
Distillation rejects any dissolved species that can't follow water vapor across the gap.
Distillation is a physical separation. It doesn't catch everything.
Marisoli is in active development. Sign up to follow the journey from patent to product — and to be notified when units are available.
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