24/7 energy from 500 ml of saltwater

\Yoann Berno Investing in climate breakthrough technologies to solve climate change 💥 | Founder of Climate Insiders

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Sounds impossible. But it’s real.

24/7 energy from 500 ml of saltwater. 🌊💡

Meet E-Dina WaterLight, a Colombian renewable-energy startup turning seawater into power.

The science is simple: saltwater + magnesium = a chemical reaction that generates clean energy.

The impact?
🔋 Up to 45 days of light from just half a litre of saltwater
🔋 Off-grid communities gain reliable power overnight
🔋 Fully recyclable, designed with the circular economy in mind

For the hundreds of millions still living without electricity, this is a game-changer.

Now imagine scaling this tech across remote villages, disaster zones, and coastal communities worldwide.

Would you try powering your home with seawater?

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Credit: @Harald Friedl

The Colombian startup E-Dina has developed WaterLight, a portable lamp that generates electricity from saltwater through a process called ionization. This device uses the reaction between saltwater and internal magnesium and copper plates to produce power for light or to charge small devices via a USB port. It is designed as a sustainable and reliable energy alternative for off-grid communities, and a single liter of saltwater can provide up to 45 days of light.  

How it works

• Saltwater is the key: The device uses saltwater as an electrolyte to trigger a chemical reaction. 
• Ionization: The saltwater reacts with magnesium and copper plates inside the lamp to produce electricity. 
• Extended power: With a 500-milliliter fill, the WaterLight can provide up to 45 days of light, with one light providing approximately 5,600 hours of total energy. 
• Versatile power source: It can be used to provide light, charge small devices like mobile phones, or power a radio, making it a versatile tool for off-grid living. 
• Cultural integration: The design is inspired by the traditional art of Colombia’s Wayúu community and is made with 100% recyclable materials. 

Benefits for off-grid communities

• Reliable energy: Unlike solar-dependent lamps, it works 24/7 regardless of weather conditions. 
• Improved quality of life: It provides light for activities such as studying after dark, which is difficult with hazardous candlelight. 
• Economic opportunities: It can enable fishermen to work at night and help artisans fulfill orders. 

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