Sunreef sailing into a more sustainable future with Francis Lapp | SuperYacht Times

[@mojojojo_BB]

Love the way Justin presents, he's not only both knowledgeable and personable, but does a great job explaining everything.

[@panpiper]

Add to that handsome with a great voice.

[@SenpaiSchuda]

Thank you. This was by far the most informative video on the Eco 80. Glad you kept the accommodation part short since I want to know about the technical highlights. Sadly you did not go into the sailing modes of this boat. That would have interested me much and I have not found much information on this topic anywhere so far.

[@gregwindell7702]

Be strong enough to be honest and kind

[@dennisboyd1712]

WOW The Future of yachting

[@sappir26]

Love it 😍

[@HD46409]

It would be nice to see some polars for the Sunreefs. I have my suspicions about their speed, but they are long so....

[@SoCalFreelance]

Hopefully Sunreef collaborated with the French Energy Observer team to gain insights into hydrogen fuel cells and high efficiency electric power systems for yachts. They traveled the world so the technology is viable.

[@tomaszchrostowski9687]

Great !!! Innnowation !!! Pozdrawiam serdecznie

[@anotherelvis]

How many hours does it take to charge the batteries completely using solar alone? How many kilometers can it travel on a full charge without using sail?

[@anotherelvis]

Did I get this correct? Peak solar power output 40kW. Power of electric motor 880kW. Battery capacity 550kWh Time to charge at peak power 550kWh/40kW= 13.5 hours Maximum sailing time 550kWh/880kW = 0.6 hours = 40 minutes

[@anotherelvis]

At 12:42 the motor is using 30kW which is far less than 550kW, so that should lead to a much longer sailing time.

[@superyachttimes]

Hello @anotherelvis! Thank you for your interest in Sunreef Yachts. You can reach out directly to their team at [e-mail]. Their knowledgeable staff will be happy to answer any questions you may have.

[@panpiper]

Hydrogen is NOT a fuel source. It is an energy storage system to compete with batteries. There are no hydrogen wells. If you want hydrogen, you generate electricity for hydrolysis or you pull it from natural gas, etc.. Being 'hydrogen' powered does not make you any more green than batteries. Indeed because of energy loss during conversion, hydrogen is 'less' green than batteries. If you want a fuel storage system (more power dense than batteries) you should really opt for Methanol fuel cells. Methanol is usually pulled from natural gas which is not carbon neutral, but it IS possible to generate methanol from electricity from say solar farms. This method is still more expensive and R&D and test plants continue. If one's conscience will not allow for a carbon footprint for one's yacht, the trick is to invest enough in methanol R&D projects for your pilot plant to generate more methanol than your yacht consumes, then pick up whatever methanol you need from wherever with a clean conscience, as in net, you are carbon negative.

[@unrealsup]

I know in the case of the Energy Observer catamaran, they are using excess power from the solar panels to do hydrolysis with sea water and store it in pressurized tanks. Then the fuel cells use the hydrogen to create power when they need it, instead of the batteries. You can't generate methanol from seawater.

[@winniduesseldorf]

Does your yachts use toroidal propellers ?

[@RM-245]

How much does this cost?

[@yooliu9140]

about 8,5 million EUR (9,5 million USD)

[@user9b2]

Imagine this boat also use sailing wings too. 😌

[@dennisboyd1712]

Great idea

[@TheStaniG]

My KEY CONCERN is all these proprietary hull embedded solar panels will need to be replaced in 15-20 years.... How are you going to do that if theyre embedded in the hull and the mast without essentially getting a new boat??? Normal panels you just unscrew from their brackets and pop on a new one. These... what on earth do you do with this ship?? Doesnt sound very eco to me.

[@anastasiyamyslivets969]

the panels could be replaced.

[@dieseldog00]

The Super Yacht Captain explained about replacing the panels. Sounds easy...

[@regel303]

How much energy to manufacture? How much energy to dispose or recycle? How many toxic heavy metals challenging to extract and recycle without environmental damage. Thank you for such an exceptional example of the lies of "sustainable future." We didn't even get into the guests with 10,000 sqft homes and vacation homes that will arrive by private jet. AGW...sustainable future.... That's some metric.

[@leeshaw6641]

If you can afford a boat like this, Economy is the least of your problems. Why not use words like 'Green' instead. Also, if a boat can be 'independent' and have an unlimited range, this would be much better marketing. Solar is the future for sure. We just need more honest marketing. I'd burn car tires if it turned a profit haha

[@michaellane7375]

"Eco" stands for ecological, not economy. As in "eco-friendly"

[@nealmcb]

it drives me crazy when he can't even get the most basic energy units correct. E.g. @12:45 saying the motors use 30 kilowatts "per hour" of power. No, power is measured in kilowatts, period.

[@wrobelda]

He talks about energy consumption at the speed, not power, what are you on about? kWh is used properly here. Sigh!

[@Always_Sunday_yt]

Beautiful cat but eco cruising, that’s the definition of a oxymoron.

[@vasiloconnell281]

Он сказал не будь русским? Этот еврей расист?

[@miketee2444]

Sorry but calling a boat that requires this amount of maintenance even remotely Green or Sustainable is a joke. Please listen to yourself as you speak.

[@martinogold]

Can you elaborate on what maintenance is constantly needed and how bad it is for the environment, especially when compared to a fossil fuelled boat?

[@patrickabas1112]

Where Silent Yachts failed (in my eyes) Sunreef excelled. With Sunreef you most likely do not have to use your generator. I do have a question regarding re-gen. Let's paint the picture; we have two electric motors. If we just one motor to power the boat and use the second for re-gen purposes. What would the total net drain be? One would drain and the second would re-gen. This would extend the range considerably I would I magine.

[@drew651]

The added drag the motor would create while producing power would have to be overcome by the other motor. And nothing is 100% efficient so it would be a net loss to do that. The boat would also be trying to turn constantly and you would have to correct for that, causing even more drag.