Spain sends solar panels to sea in Vigo’s first open-water test

Dear Cherubs, Spain is now sending solar panels to sea school. In Vigo, a shipyard is building a 1-megawatt open-sea floating photovoltaic pilot for BlueNewables and Naturgy, made up of two 500-kW units. The system is scheduled for commissioning in March 2026 and then real-world testing in the Port of Valencia, so the Mediterranean cameo comes later, not at the factory gate.

HOW IT WORKS

The idea is part engineering, part common sense. The platform uses a catamaran-style design with modular floats and bifacial panels, which the companies say helps keep the panels farther from direct wave impact and makes maintenance less awkward than it sounds. BlueNewables also says seawater is used as a natural refrigerant, a neat trick in a sector where heat usually nibbles away at performance.

Floating solar has another obvious perk: water can cool panels and improve yield, while also reducing evaporation on reservoirs and other inland waters. The World Bank and NREL both note those benefits, though results depend on site design, climate and whether the system is bobbing on a calm reservoir or getting bounced around by open water. In other words, this is renewable energy, not wizardry.

WHY VIGO MATTERS

Vigo is not a random dot on the map here. A 2025 study on floating solar site selection applied its method to the Ría de Vigo and identified about 7 square kilometres as especially promising for nearshore FPV deployment. That does not mean a giant solar raft is about to colonise the estuary tomorrow, but it does show the area is being taken seriously as a test bed for marine renewables. If you were thinking of Spain’s earlier floating solar plant at the Sierra Brava reservoir, that was an inland-water predecessor, not this open-sea pilot.

Spain is also building a legal lane for this kind of technology. Reuters reported in 2024 that the country approved rules for floating photovoltaic plants on state-owned reservoirs, limiting them to 15% of a suitable water surface and allowing concessions of up to 25 years. So the paperwork is slowly catching up with the hardware, which is always a lovely surprise.

The bigger picture is simple: land is crowded, ports need clean power, and the sea has started auditioning for a job in the energy transition. Whether Vigo’s project becomes a model, a niche solution or just the world’s fanciest test platform will depend on how it handles weather, maintenance and cost. But for now, Spain has taken a very literal step into floating solar, and it is doing so with a bit of swagger.

Sources list
Naturgy — https://www.naturgy.com/en/press-release/naturgy-promotes-a-pioneering-floating-photovoltaic-project-in-the-open-sea/
Offshore Energy — https://www.offshore-energy.biz/bluenewables-starts-floating-solar-project-in-vigo-design-certification-underway/
Reuters — https://www.reuters.com/sustainability/climate-energy/spain-sets-rules-to-install-floating-solar-plants-2024-07-09/
ScienceDirect — https://www.sciencedirect.com/science/article/pii/S0959652625020839
World Bank — https://documents1.worldbank.org/curated/en/418961572293438109/pdf/Where-Sun-Meets-Water-Floating-Solar-Handbook-for-Practitioners.pdf
Ormazabal — https://www.ormazabal.com/en-gb/spain-will-host-europes-second-largest-photovoltaic-plant/
Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Solor_panels_on_the_water.jpeg

"China’s exports of clean technology climbed in March, reinforcing signs that manufacturers are benefiting from rising global demand for alternative energy sources as traditional supplies are roiled by the Iran war.

The most notable growth came in shipments of lithium-ion batteries and electric vehicles, with an annual increase of 34% and 53%, according to data released by China’s General Administration of Customs on Saturday. Solar cells also saw 80% growth last month. All three exports rose from February levels as well.

The data give the first comprehensive picture of China’s clean tech exports since the US and Israel launched attacks against Iran seven weeks ago, effectively shutting the Strait of Hormuz and sparking a global energy crisis. The disruptions caused by the conflict have heightened the issue of energy security for countries reliant on fuel imports and sent consumers and industries hunting for alternatives.

“This is just the beginning, the knock-on effects of high energy prices will be unfolding for months to come,” said Euan Graham, senior analyst at UK-based think tank Ember. “Clean technologies are an escape from soaring fuel costs for consumers and a long term route for countries to reduce fossil fuel reliance. China is well positioned to meet this growing demand.”"

https://www.bloomberg.com/news/articles/2026-04-18/china-clean-tech-exports-jump-amid-global-energy-disruption?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTc3NjUwMDM3MSwiZXhwIjoxNzc3MTA1MTcxLCJhcnRpY2xlSWQiOiJURE03TkFLSzNOWkYwMCIsImJjb25uZWN0SWQiOiIwQzg4NkY0NTI0NzY0RUE0OEY2QTk4RTk1NDc5RTI2NSJ9.FrOmzgqMXV40RiuX6mkRulDGA2LOHlCBOR_DjDqxwg8&leadSource=uverify%20wall

#China #Renewables #CleanTech #EVs #LithiumIonBatteries

Singapore’s Rain-to-Power Idea Is Small, Strange, and Surprisingly Serious

Dear Cherubs, Singapore’s rain-harvesting researchers have found a way to turn falling droplets into electricity, which is the kind of sentence that sounds half like science and half like a fever dream. According to the American Chemical Society, the team used rain-sized droplets in a vertical tube to create a plug-flow pattern of water and air pockets, and that movement separated electrical charge as the water traveled downward.

THE THING WITH RAIN

The setup is refreshingly low-drama for a clean-energy experiment: a metal needle, a small tower, a narrow polymer tube, and water that falls in droplet form instead of a steady stream. When the droplets collide at the top of the tube, they form short columns of water with air gaps between them, and that odd little arrangement turns out to be the whole trick. ACS reports that the system converted more than 10% of the water’s energy into electricity, while Euronews noted that the setup was powerful enough to light 12 LEDs for 20 seconds.

That is not grid-scale power, obviously. Nobody is cancelling the national utility just yet, and your toaster is safe for another day. But the result matters because many earlier water-harvesting approaches struggled with tiny outputs, especially when water had to be pumped through very small channels. The ACS coverage says this plug-flow method generated five orders of magnitude more electricity than continuous stream flow, which is a very scientific way of saying the old setup was, frankly, not pulling its weight.

WHY IT MATTERS

The appeal here is not that rain is secretly a new coal seam. It is that cities already have rooftops, gutters, and drainage systems, so a technology that can harvest energy from rainfall without needing a dam could fit urban spaces much better than traditional hydroelectric infrastructure. ACS says the researchers see the approach as potentially simpler to install and maintain than large hydro systems, and they specifically point to rooftops as a practical future use.

There is still a gap between “cool lab result” and “your building now powers itself every stormy Thursday.” The researchers tested rain-like droplets that moved more slowly than actual rain, so real-world scaling will have to prove the idea can survive wind, weather, maintenance, and the usual joyless paperwork that greets every promising energy invention. Still, the concept has a rare bit of charm: rain, the thing usually blamed for wet socks and delayed commutes, may end up earning its keep.

So no, this is not the moment when rainy cities become free-energy theme parks. But it is a genuinely interesting step toward turning a nuisance into a resource, and that is a lot better than letting all that falling water do absolutely nothing except ruin your hair.

Sources:
American Chemical Society press release — https://www.acs.org/pressroom/presspacs/2025/april/a-step-toward-harnessing-clean-energy-from-falling-rainwater.html
ACS Axial — https://axial.acs.org/energy/harvesting-clean-energy-from-rainwater-using-plug-flow
ACS Central Science research article — https://pubs.acs.org/doi/10.1021/acscentsci.4c02110
Euronews — https://www.euronews.com/2025/04/17/clean-energy-from-rain-scientists-generate-electricity-from-falling-droplets
Unsplash image — https://unsplash.com/photos/a-black-and-white-photo-of-rain-drops-on-a-window-rrd-KVjmlfo