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Shipowners and operators may be able to decrease their fuel-related costs and pollutant emissions up to 30%, thanks to a new system created by Bound4blue. The Spanish company aims at delivering automated wind-assisted propulsion systems (also called wingsails) that can be integrated onto a wide range of vessels. The Beam spoke with one of the founders, José Miguel Bermúdez.

Who are the people behind Bound4blue?

The project was founded by Cristina Aleixendri, David Ferrer, and me, José Miguel Bermúdez. The three of us are aeronautical engineers, which clearly served as the foundation of the technology developed. We found soft sails installed in sailing boats or yachts, but none in commercial vessels. We believed we could apply our knowledge in aeronautics to build a high-lift device for the shipping industry adapted to its requirements, that could be the solution to the two showstopper challenges they are facing: high fuel operating expenses and emissions reduction pressure from international entities.

We have been selected as one of Europe’s most promising innovators under 35 by MIT and featured amongst the 30 brightest industry European entrepreneurs under the age of 30 by Forbes. The design, manufacture, and launch of scientific capsules to the space, the construction of efficient wind towers, or the deployment of Geodetic Quality Sea-Ice drift buoys in the Arctic are some examples that precede our team and that mark a business and technological trajectory for Bound4blue.

The team is nowadays formed by 15 people, who combine several expertise in different fields of business and engineering, including aerospace engineering, naval architects, electronics engineering, statisticians and mechanical engineering.

How exactly do the automated wind assisted propulsion systems work? Can we talk about renewable energy in this case?

Bound4blue’s wingsail system generates effective thrust from wind power and thereby reduces the engine power required, saving fuel and pollutant emissions. For example, one of the latest cases we are working on is a Handysize (183-meter length) vessel, operating in the route Busan (South Korea) – Seattle (US). In this case, installing two 30-meter units of our system, we can save more than 940 tons of fuel per year, which represents more than 2,900 tons of CO2 savings per year, with an investment payback period of less than three years. Having successfully passed all the tests in the prototyping phase and being within the pilot phase, our systems are now being implemented on four ships.

So to sum up, of course we can talk about renewable energy in this case. The only source we are using in the overall process is the wind power, which is directly used to propel the ships with no intermediate energy conversion. In the end and from a conceptual point of view, it is the same process that humanity has been using for thousands of years, using the wind to navigate.

Image courtesy Bound4blue

What makes this technology innovative?

Bound4blue’s innovative technology is a creative application of an already existing one. Wind was once used centuries ago to propel vessels, so it is as simple as going back to the basics but using 21st century aeronautical technology. The solution was inside the industry from the very beginning, but we were able to take our aeronautical knowledge and build it on top of an ancient concept to create Bound4blue’s solution. The challenge we had to deal with was adapting this technology to commercial vessels and finding solutions to problems that are specific to those vessels.

Our technology is capable of providing double-digit fuel savings and emissions reduction with a payback below five years, it can be folded (useful for fleets with air-draft or operations limitations), it has extended operability thanks to the rotation capability and it works with a simple and fully autonomous operation, so no extra training or workload from the crew is required.

What can its impact on the shipping sector be? How can it help reduce emissions in the long term?

Maritime transport is a key industry for our society, transporting over 80% of the worldwide cargo. However, its pollutant emissions are a major environmental challenge. Maritime transport accounts for 3% of the global CO2 emissions, 15% of NO worldwide emissions and 13% of SO2 global emissions; it is having a direct impact on our planet in forms of global warming or acid rain, and being responsible of 14 million cases of childhood asthma each year and 60,000 cardiopulmonary and lung cancer deaths annually. In fact, maritime transport generates as much CO2 as the sixth most polluting country in the world, and the 16 largest vessels in the world generate the same amount of Sulphur emissions as the entire global fleet of cars.

Our technology reduces the emissions produced in the maritime transport of cargo and people by decreasing the use of fossil fuel with the same level of energy used by the ship. According to the Impact Forecast Analysis we carried out using the Climate Impact Forecast tool, more than 590 thousand tons of CO2 emissions will be saved in the following five years due to Bound4blue’s forecasted installations. So our technology will be a massive emission saver in the upcoming years. Also, our solution provides huge opportunities to modernize the infrastructure which will create new jobs and promote greater prosperity across the globe.

What kind of setbacks have you encountered, and what kind of support helped you get through? Where will future endeavors bring you?

As with any product development, there is a risk of obtaining lower performances and not achieving the desired economic viability for the market. The technological and practical feasibility have been proven so far by our land prototypes and the demo is being run for merchant and fishing vessels.

Bound4blue’s solution is highly capital intensive, but we have already succeeded in raising over €5.8 million contribution from private investors and grants. In this type of venture, there is always a risk of slow market acceptance and adoption, but interest in the product has already been proven. Bound4blue has received funding from the European Regional Development Fund throughout several projects granted by the Government of Catalonia and the Government of Cantabria, as well as from the European Maritime and Fisheries Fund (EMFF) throughout two projects which are being developed right now together with other European companies. Moreover, Bound4blue received funding from EIT Climate KIC and presently financial support throughout the extraordinary COVID-19 venture support call. EIT Climate KIC has supported us with financing, mentoring, training and access to a global network of investors, as well as increasing our media exposure. They have helped us translate our business model into more transactions with customers that are validating our core value proposition, as well as enabled us to attract more capital to progress into the next stage in the business development.

Bound4blue is now at a pre-commercial stage. The next step is to implement a worldwide industrial network (shipyards, systems manufacturing and assembly), as well as to grow the team in the business development and commercial departments to expand operations and boost sales in Europe and Asia. Moreover, we will undergo incremental development to decrease costs while increasing efficiency and security.

 

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China’s nationwide ‘cash for clunkers’ trade-in program causing huge e-bike boom

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China's nationwide 'cash for clunkers' trade-in program causing huge e-bike boom

While much of the Western world is still figuring out how to get more people on electric bikes, China just flipped a switch, and the results are staggering. Thanks to a generous nationwide trade-in program rolled out around six months ago, China has seen an explosive surge in electric bicycle sales, with over 8.47 million new e-bikes hitting the road in the first half of 2025 alone.

The program, which offers subsidies to riders who trade in their old, often outdated electric bikes for newer, safer, and more efficient models, has sparked a new e-bike sale boom in a country already dominated by e-bike travel. In major provinces like Jiangsu, Hebei, and Zhejiang, over one million new e-bikes were sold in each region in just six months. That’s a tidal wave of e-bike sales.

The incentives vary depending on location and the model being traded in, but for many consumers, the subsidies cover a substantial portion of a new e-bike’s price – enough to turn a “maybe next year” purchase into a “right now” upgrade. And these aren’t just budget bikes either. The program has driven demand for higher-quality models with better batteries, safer braking systems, and more reliable electronics, accelerating both adoption and innovation across the industry.

The move has proven successful in replacing the millions of older models with lower-quality lithium-ion batteries that had posed safety risks around the country. Instead, China has pushed for higher-quality lithium-ion batteries, a return to a newer generation of higher-performance AGM batteries, and even interesting new sodium-ion battery options.

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Most e-bikes in China look more like what we’d consider seated scooters

According to China’s Ministry of Commerce, more than 8.4 million consumers have participated in the e-bike trade-in program so far, contributing to a sales increase of 643.5% year-over-year and more than doubling sales month-over-month. Meanwhile, production of new electric bicycles rose by nearly 28%, as manufacturers scrambled to meet demand. The sales boosts have already been seen in the financial reports of major industry players like NIU.

And it’s not just the big players benefiting – over 82,000 small independent e-bike dealers reported average sales increases of ¥302,000 (around US $42,000), giving a serious boost to local economies.

What’s particularly striking here is how fast this happened. The program was officially launched late last year as part of a broader effort to stimulate domestic consumption and phase out outdated vehicles and appliances. But while most analysts expected gradual growth, the e-bike sector responded much more quickly. In less than a year, the trade-in subsidies have reshaped the electric bicycle market, creating a consumer-driven boom that shows no signs of slowing.

For those of us watching from outside China, it’s hard not to wonder what might happen if other countries tried something similar. While most families in Chinese cities already own an electric bike and thus see this as an opportunity to trade it in for a newer model, Western countries like the US are still figuring out how to stimulate commuters into buying their first e-bike.

It’s too soon to know exactly how long the boom will last or whether the momentum will carry into 2026 and beyond. We’ve seen bicycle industry bubbles grow and burst before. But one thing’s clear: with the right incentives, even modest ones, it’s possible to ignite real, large-scale change. China just proved it with nearly 8.5 million new e-bikes to show for it.

And if you’re wondering what it looks like when a country takes electric micromobility seriously, this is it.

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Day 1 of the Electrek Formula Sun Grand Prix 2025 [Gallery]

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Day 1 of the Electrek Formula Sun Grand Prix 2025 [Gallery]

Today was the official start of racing at the Electrek Formula Sun Grand Prix 2025! There was a tremendous energy (and heat) on the ground at NCM Motorsports Park as nearly a dozen teams took to the track. Currently, as of writing, Stanford is ranked #1 in the SOV (Single-Occupant Vehicle) class with 68 registered laps. However, the fastest lap so far belongs to UC Berkeley, which clocked a 4:45 on the 3.15-mile track. That’s an average speed of just under 40 mph on nothing but solar energy. Not bad!

In the MOV (Multi-Occupant Vehicle) class, Polytechnique Montréal is narrowly ahead of Appalachian State by just 4 laps. At last year’s formula sun race, Polytechnique Montréal took first place overall in this class, and the team hopes to repeat that success. It’s still too early for prediction though, and anything can happen between now and the final day of racing on Saturday.

Congrats to the teams that made it on track today. We look forward to seeing even more out there tomorrow. In the meantime, here are some shots from today via the event’s wonderful photographer Cora Kennedy.

Stay tuned for more!

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Tesla sold 5,000 Cybertrucks Q2, Optimus is in chaos, plus: the Infinity Train!

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Tesla sold 5,000 Cybertrucks Q2, Optimus is in chaos, plus: the Infinity Train!

The numbers are in and they are all bad for Tesla fans – the company sold just 5,000 Cybertruck models in Q4 of 2025, and built some 30% more “other” vehicles than it delivered. It just gets worse and worse, on today’s tension-building episode of Quick Charge!

We’ve also got day 1 coverage of the 2025 Electrek Formula Sun Grand Prix, reports that the Tesla Optimus program is in chaos after its chief engineer jumps ship, and a look ahead at the fresh new Hyundai IONIQ 2 set to bow early next year, thanks to some battery specs from the Kia EV2.

Prefer listening to your podcasts? Audio-only versions of Quick Charge are now available on Apple PodcastsSpotifyTuneIn, and our RSS feed for Overcast and other podcast players.

New episodes of Quick Charge are recorded, usually, Monday through Thursday (and sometimes Sunday). We’ll be posting bonus audio content from time to time as well, so be sure to follow and subscribe so you don’t miss a minute of Electrek’s high-voltage daily news.

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