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The technology aboard Energy Observer

Pictures
Vertical wind turbines can power the boat directly and also help power the transformation of seawater into hydrogen. Image credit - Antoine Drancey/ Energy Observer
Double-sided, or bifacial, solar panels can use the sunlight reflected from the water as well as that shining down from above to produce energy. Image credit - Jérémy Bidon/ Energy Observer
Seawater is desalinated (top left) and electrolysed in order to produce hydrogen. The hydrogen is the compressed to 350 bars (top right) and stored in tanks (bottom). Image credit - Energy Observer
The boat's only fuel cell converts the stored hydrogen into electricity and heat. Image credit - Jérémy Bidon/ Energy Observer
Erussard (left) and Delafosse (right) hope that by improving the technology incrementally over the course of their six-year voyage, they can demonstrate that hydrogen is a viable fuel for ocean travel. Image credit - Energy Observer