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Re: New guy Questions
Glenn,
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I'm interested in your budget. How much would a diesel re-power cost for your boat? Are you considering electric primarily because you think that it is a cheaper alternative to ICE? You should seriously think about the compromises that you're signing up for. A 500 lb flooded or AGM battery bank will drive your boat about as far as 0.75 gallons of diesel. The Vega is a small boat, do you have room for eight 6V golf cart batteries or four 4D batteries? A new Beta twin diesel weighs about 200 pounds. A decent sized electric drive will weigh 200+ lbs more than a diesel system, including a full 8 gallon fuel tank, that is sized for your boat. How long have you been sailing your boat? How much fuel do you usually burn over the course of your regular trip? When I realized that I rarely burned one whole gallon per trip in my boat, electric drive became more feasible. I'll spend at least 80% of what I would have spent for a diesel re-power that I did myself, so I'm not doing it to save money. As long as you approach this project with your eyes open to what it really means, then you shouldn't be disappointed. i've seen a number of newly converted boats that obviously did not meet their owner's expectations. Fair winds, Eric Marina del Rey, CA --- In electricboats@..., "vega1184" <vega1184@...> wrote:
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Re: converting an Albin Vega 27 to electric propulsion
Yep, regen rarely lives up to its promise. I'll say this again, I have not heard of any verifiable claim of generating more than 100W at 5kts boat speed or less. That's less than 2A at charging voltages for a 48V system.
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Depending on where you live and boat, wind also has a difficult time living up to expectations. The typical wind generators create no power under 7 or 8kts wind speed and take about 15kts before they generate any significant power. So anytime your apparent wind drops to about 10kts you're not going to be putting much into your batteries. I've known a few people that have gotten complaints in regular marinas about the noise made by their generators. That said, wind generators can be an effective way to keep a battery system topped up and in some areas can do a decent job charging. Of the onboard, renewable choices, solar seems to be the most consistant method. Properly sized and placed, a solar array can provide significant power while sailing and may recover a depleted battery bank in a few days of full sun. Solar panels are truly silent and add very little drag, unlike wind or water power alternatives. Some small boats may have a difficult time finding enough room for than 100W of PV panels, other boats have room for much more capability. Fair winds, Eric Marina del Rey, CA --- In electricboats@..., "vega1184" <vega1184@...> wrote:
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Re: converting a 42 foot sloop to electric propulsion
vega1184
Is regen that bad, I have similar plan (see other post) but will have limited batteries and wanted to recharge by regen. Would wind gen be better than regen.
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--- In electricboats@..., "Mark n Angela" <mstafford@...> wrote:
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New guy Questions
vega1184
I need to repower my 27' sailboat was looking at a diesel but electric has interested me. I have a strong mechanical background and some electrical experience mostly automotive and a little residential, that being said I can safety repair most anything; it's designing where I may need some help. I have a very healthy respect for electricity and always ensure cables are properly terminated, sealed and secured, all grounds are in place and all batteries secured.
First off budget is an issue I don't want to go over $4K, from prop to batteries, is this possible? Rough guess shaft, prop, bearings, etc $1K. Kit something like Thunderstruck, Sevcon Brushless Sailboat Kit - 8.5KW () $1.5K. Wiring, motor mount, belt drive reduction, misc bits $0.5K. That leaves $1K for batteries and chargers, not much I know, but I could add more later. I would thinks 48 volt would be better (at least safer), but amps are starting to get high. Batteries, I guess I would have to go with AGM, have some space, would love LiFePO4 but out of my buget right now. Any one have any suggestions? Boat Specs 1971 Albin Vega LOA 27' LWL 23' Beam 8' at WL 7' Displ average 6500 Lbs Glenn |
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Re: [Electric Boats] Hunter 27 has electric option
David Hughes
Elco is located here on the east coast, NY I think, and is one of the oldest companies dedicated to electric boating. However, they have gone through many ownership changes and challenges with one very recently. I tried contacting them this past year for my project and after several phone calls and the total lack of information, I gave up. I do hope they have figured it out and got beyond their troubles.
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--- In electricboats@..., David Goldsmith <suntreader@...> wrote:
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Re: [Electric Boats] Re: High end electric/diesel yacht
David Goldsmith
On Tue, Nov 23, 2010 at 7:43 PM, Eric <ewdysar@...> wrote:
Electricity in California is some of the cleanest in the country, so you guys are probably in good shape for electric vehicles from an emissions per person mile stand point. Unfortunately, the rest of us are still running on coal with some natural gas in there and I know of several biomass plants in the works down here, so that's good news. Its still a stretch to assume that emissions are lower via central generation rather than point of use, there are just too many other factors that can shift the equation either way; you've got a much better chance than I do, but for instance California does not have the most modern power grid around and distribution losses can be very very high. I'm not asserting one is better than the other in every case; again, its very complicated, just that even given a very efficient point of use or a very efficient central generation set-up, the question still has too many factors to be able to use one bit of information to answer the question. This isn't a failing for any of us, its just the nature of the beast to have so much uncertainty in it. The most concrete answer would be a moderate solar array on the stern rail to charge up the battery bank. Then you know exactly where the energy is coming from and you know there aren't any emissions related to the daily use of the system. The other point to be made about claims of renewable power purchases is that sort of accounting and accrediting is very suspect at this stage. There are many cases of those claims being the result of accounting tricks, buying carbon off-set credits of questionable validity, buying shares in funds to build future renewable energy stations, or otherwise making the claim without any relation to the actual energy being generated and used. If you were so inclined, and I'm certainly not, you'd have a lot of work cut out for you to trace the volts at your outlet back to their generation source. I don't have a better answer for you about figuring what type of energy each of us gets but its never as simply as we'd like. ?
I haven't been privy to Lagoon's R&D program so I can't speak to how much feedback they've had or how that has affected their designs for future systems. I'll note that they don't seem to offer an electric model anymore, is that the case? I'm not sure the Lagoon experience was a good one for electric boats. I don't know what happened with those models or with Solomon but the scuttlebutt was the systems didn't perform to expectations, were terribly expensive, unreliable, and were quickly dumped by their owners and the company as well, as we all know perceptions can be more important than the truth, take for instance the lack of diesel powered small vehicles in the US, the rest of the world loves them but if you ask an American about diesel cars they'll recall the loud, smelly, slow Mercedes Benz models from the 70s (which I happen to think are pretty cool). I have no idea if those things are true, I know we have a member who has one and likes it and his experience is invaluable around here; but those rumors and tales, whether there was any basis to them at all, for all I know it was the oil companies whispering things around the docks, have probably scared off more builders and buyers than they encouraged. I do know from many years ago the founder of Solomon made a lot of outlandish claims and generally wasn't the guy you'd want to listen to when it came to electric motors but he's since left the company. I'm not claiming to know the story, really I guess I'm asking if anyone here knows any more than the dock side chatter I've gotten up to this point, some internet scuttlebutt is better than some dock scuttlebutt isn't it? In general I'd rather make modest claims and surprise people than make outlandish claims and disappoint, but I'm no salesman. I'm sure the Hunter guys followed all of that with interest and I'll add that to the list of things to ask them if I head over there. ?
They aren't really my style either but they'll sell more of those 27es than probably every other electric sailboat model combined up to this point. Really I'm surprised Catalina didn't get there first, they're usually more of the leader in this relationship, there could be all kinds of business dynamics going on; Catalina could be waiting to see how Hunter does, Catalina may not have been able to get the motors in the quantities they needed but Hunter could with a smaller production run, the President of Elco may be sleeping with the purchasing agent over at Hunter, who knows. Beneteau would have been my second guess but they had their electric outing in Lagoon, I'd like to think they have a blockbuster system up their sleeve but really the innovation potential in electric drives for boats is pretty low. The current tech is pretty much maxed out, the motors and controllers are super efficient, its just batteries that hold everything back, if the battery technology would show up then we'd all be off to the races, until then we're just hoping the wind doesn't quit. There's also the R&D costs involved, the margins on small boats is already pretty thin and you can guess there aren't a lot of people buying those entry level yachts these days, I'm sure Hunter is taking a chance but for better or worse they do seem to 'innovate' (i.e. do weird things) more than Catalina, such as the B&R rig, or those round cockpits they were using back in the late 90s. ?
Good call. David ?
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Re: High end electric/diesel yacht
David,
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The electric power from my local utility is confirmed to be more than 20% supplied by renewable sources. The largest coal powered plant within 300 miles was decommisioned in 2005. The bulk of our local power generation is from natural gas, so I would say that the electricity in my area is considerably cleaner than power from IC engines. In our area, electricity is not used much for heating anything, water, cooking and area heating is usually natural gas because it is more efficient (cheaper) overall, it just happens to be cleaner too. Moving on to the trickle down process, I would use the Solomon/Lagoon joint venture as an example. The handful of charter catamarans that were put into service provided enough feedback from regular users, that Solomon re-engineered the systems that they sell to people like you or me. Those charter cats were pulled from service and "new and improved" versions were released later. (I believe that one of the early Lagoons is owned by someone in this group). The real world experience gained from less than a dozen of these large boats has influenced many later ventures, I would bet that the Hunter engineers are very aware of what worked there and what didn't. About the Hunter 27e, I think that the Hunter 27 is a reasonable modern production boat, though not my cup of tea. Using Elco's "drop-in" diesel replacement should be pretty straightforward. I give Hunter a big thumbs up for putting the option out there, even if they haven't built one yet (does anybody know?). I've heard that Catalina out here on the west coast is discussing electric options too. I'll move any more thoughts about the Hunter to its own thread. Fair winds, Eric Marina del Rey, CA converting my 1964 Cheoy Lee Bermuda 30 ketch --- In electricboats@..., David Goldsmith <suntreader@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
David Goldsmith
On Tue, Nov 23, 2010 at 5:05 PM, Eric <ewdysar@...> wrote:
Respectfully, the EPA methodology isn't as foolproof as a single number can explain. Electric cars, unless they are being charged from a known renewable source, such as wind, solar, biomass, or hydro, do have emissions associated with their use, but determining those emissions is a case-by-case situation starting from their charging outlet and ending up at the mine or the well where the fuel originates. I have no doubt that electric cars, when compared to conventional cars, use less energy to drive around, but I think its more from their owners attention to weight, driving habits, and design of the vehicle rather than something inherent in using grid power instead of point of use power. ?
No argument there. Boats are pleasure objects, they're all wonderful when they fulfill the desires of their owners, and I'd never tell someone they had a 'bad boat' as long as it made them happy. Electrics are a great way to power a whole lot of boats out there, but 50 foot planing cruisers isn't one of them, at least not yet. Personally, I'd rather have electrics over an engine any day as long as it met my needs, but that's personal, a lot of people just love big loud engines and more power to them (no pun intended), boats are for personal fun after all. ?
My discussion certainly is speculative, I haven't been on the boat and probably never will be (but would love a ride if anyone is offering!) maybe someone with some experience running large yachts like this one could weigh in on how they see the electrics being advantageous? For all I know slow speed maneuvering may very well be a big problem with large planning boats, and the engines idle being too loud early in the morning may be a big problem too, I'm sure someone with some experience could give some more examples. Advertising materials get away with an awful lot, legally anyone can pretty much say anything they like, whether that is a good thing or not is an entirely different discussion that has nothing to do with electric boats so thankfully we don't have to get into it, but personally (just me talking here), I think its a stretch to talk about zero emissions and about 'hybrid' because these terms imply something to consumers, and what it implies isn't what this boat does. I'd say the same thing about a whole lot of advertising out there, not trying to single these guys out. ?
I'm certainly willing to discount, ridicule, even mock the opinions of others if they're sufficiently stupid, it doesn't happen often, and it hasn't happened around here, but I reserve that right:) You make a good point that this is a pleasure boat, and I didn't mean to suggest that any of our boats are 'efficient' or anything like that, its all surplus when it goes into our toys and that's wonderful, from the silliest little lake schooner to the ugliest mega yacht, and certainly to my ancient sailboat, boats are all just fun things not to be taken too seriously. If they would have just described the boat and its systems then I'd probably be more interested in its drive than anything else, but when they go on about how its a planing hull & a displacement hull & has prop tunnels & and is super efficient because it can put around at 8 knots on the electrics, well, come on, I can't let that go:) ?
Sure, no problem with any and everyone buying anything they like. I would question whether there is anything here that's going to trickle down to the rest of us. I mean, they'll probably build what, ten of these total? The systems aren't completely specified but I would guess the components are all off-the-shelf items (at least as much as they can be in boats) rather than representing a break through in motors, controllers, batteries, or gearing. There won't be enough to bring down costs on the components, and the system isn't one that would scale down to the more pedestrian boats discussed around here. At this point in the technology, motors and controllers are mature technologies that are slowly developing but there isn't much more in the way of efficiency to get out of an electric motor. The next big tech needs to come in batteries and the next big technology will move not just boats but transportation, consumer items, and probably just about everything else forward will be energy storage, so I wouldn't think this particular product is going to make that happen either. Can we talk about how great that new Hunter 27e is? I drive by the plant all the time, if the group would like to put together some questions I'm sure I could make an appointment to go and talk to the designers and see some being built (if they're in production yet.) David ?
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Re: [Electric Boats] High end electric/diesel yacht
David Goldsmith
John,
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That is sometimes offered as a reason for better emissions but it isn't always the case, and whether it is or is not comes down to a ton of factors. On one end of the scale if the marina (or your garage) was powered from a solar or wind station then even with all kinds of inefficiencies in the system there would be fewer emissions involved. At the other end if the power is coming from a coal plant hundreds of miles away then you're probably emitting less just burning the fuel where you are. This comes up when trying to figure out whether a gas range or an electric produced more emissions, if the power plant is burning the same natural gas as the stove is then its going to be more efficient to just burn it at the stove than to burn it at the power plan, convert it to electricity, send the electricity down the lines, and then convert it to heat, better to just make the heat at the point of use. It feels intuitive than an electric application produces fewer emissions than a fuel burning one but that's largely because the emissions aren't right in front of us with an electric. The case of plug-in hybrids is similar, if your power comes from coal (like most of ours in the US does) then you're probably making more emissions with a plug-in instead of just burning it where you need the the energy, you could start calculating your mileage in tons of coal instead of gallons of gas. Just as an experiment a few months ago I worked through some of the equations to try and figure out whether my gas law mower was producing more emissions than my neighbor's electric law mower. Our municipal power here comes from a coal plant. I burn about 2 gallons of gas a year in my mower. I didn't have the emissions levels for the local plant or any idea of the efficiency of the grid bringing the power over to our houses so those were just estimates in the equation. The solution was he was probably producing more emissions? using an electric mower than I was with my gas mower. His mower uses less power to do the job because of the limits of 120V electric outlets, but the exhaust from my gas mower makes a lot less of the bad emissions that a coal plant does. The equation could easily have tipped the other way with a more efficient power plant or a better distribution grid, but it would still be pretty close. Of course, the guy down the block who mows once a year does better than either of us! Its certainly true that a power plant can be more efficient with its fuel use per useful energy out, but most power plants aren't that modern and even most of the new ones aren't using the best technology either, even with the greater efficiency you have to take into account the transmission of the energy, which can sap over half of it in some cases. I guess the short answer is if you're burning fuel where you need the power then you know exactly what you're using, if you're plugging in then you have no idea, without a lot of work, how much energy is being used or what the emissions might be. David On Tue, Nov 23, 2010 at 4:20 PM, John Riehl <riehlj2002@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
David,
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I've been involved with electric car conversions for about 15 years, and I have seen the same emission arguments against electric cars. Some people have claimed that electric cars should have higher emissions per mile that average cars due to local power sources. There is now solid evidence to the contrary, the Nissan Leaf is recognized with EPA gas milage equivalent of 99mpg with holistic emissions much lower than the latest gasoline hybrids or hyper-efficient diesels. As far as "what's the point", their use case is different than my boating needs; however, that doesn't make their use case any less valid. I know a number of large power boaters that use their boats for "sunset harbor cruises" more than half the time that they cast off from the dock. That usage is low speed and could be entirely covered by shore power charging, the diesels would not need to be started at all. I agree that given the setup, the electric drives are probably not designed to add power beyond the capabilities of the IC engines, like some automotive hybrids, but again, the use case is different for a boat instead of a car. The statement that you have no experience with this type of boat makes your arguments against the concept more speculative than practical. I didn't see anything in their marketing info that was any more misleading than what you see in regular promotional propaganda for non-hybrid boats (or cars, or cell phones, or coffee makers, etc...) Like you, I personally don't believe that pleasure boats like the ones that we discuss in this group benefit from hybrid drive systems because of the additional complexity, weight, cost, etc. But I know that some people here feel differently and I'm not willing to discount other opinions just because I don't agree with them. We all get to spend our money and time however we like, so more power to whomever wants to buy one these yachts. And I'm guessing that even we will eventually gain benefits from this type of "leading edge" product with the lessons learned from supporting mainstream users. Fair winds, Eric Marina del Rey, CA --- In electricboats@..., David Goldsmith <suntreader@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
On the issue of emissions, the whole point of plug-in hybrid cars is that the energy you get from the electric grid is generated more cleanly per kWh than from an ICE due to more efficiency in a large-scale power plant. ?Shouldn't the same hold true for a plug-in hybrid boat? John
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Re: [Electric Boats] Hunter 27 has electric option
David Goldsmith
I don't have any more info than is available from Hunter or from a brief article in Sail:
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I know I gave that last boat a hard time, so let me make it up by saying this is a pretty sweet little set up. Elco is a very good name in electric boats, I'd love to have their systems and expertise designing my set up. The batteries are six 210amp/hr AGMs (4d?), which is a good compromise on cost and easy of maintenance. This is just the right sized boat to have a system like this, small enough that the motor and battery requirements are reasonable, but big enough it can handle the weight and room. Their claimed 20 miles at 6 knots sounds reasonable and not like an 'ideal conditions at 2 knots' type of situation. I'll note that the motor looks to be a very good system, completely enclosed, and possibly direct drive, its not clear if there is any gear reduction done in the case. Anyone familiar with Elco systems? The only concern I'd have is that it runs on 72V which is beyond the nominal 48V at which more safety concerns have to be addressed. I'm more comfortable with 48V but a professionally designed and installed system should be fine since they know what they're doing and I'm just tinkering. I didn't see any estimate on cost, I would assume it costs more than the standard diesel, but it really shouldn't be that much more. Sometimes Hunter is given a hard time for being one of the big-three of sailboats and producing a sort of mainstream product where price and quality have an inverse relationship. I owned a 1977 Hunter 27, the really tubby one designed by John Cherubini, and it was really a pretty good boat for what it was, built like a tank too. They've changed a lot since then of course. I took a tour of the factory a few years ago and was pretty impressed. They weren't quite the modern marvel the new Beneteau factories are but it was clean and well organized and there was still a lot of hand work going into assembling the interior components and installing the systems. This is the type of electric propulsion I think will be first to go mainstream, in boats that are really a little on the small side for a diesel and a little on the big size for an outboard, where low maintenance is more important than range under power. I really hope the other builders follow suit. As for the hobbyist, this is exactly the type of system that many of us are trying to build for our own boats of about this size and the more Hunter, Catalina, and Beneteau start offering these as options the better available and easier they will be for us to implement too. Very cool, thumbs up! David On Tue, Nov 23, 2010 at 3:11 PM, Todd <toddbates99@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
David Goldsmith
Thanks for pointing that out, I just didn't explore their materials completely enough to find that spec.
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I believe my point still stands though and I think they've dug themselves a little deeper. To claim 'zero emissions' they really need to point out that while the electric drives don't emit anything, the diesel generators (two 20kw as I remember) that are used to charge them do, and they probably emit more than the main engines would to do the same work, though that is a complex problem that I doubt anyone here can answer with authority (I couldn't either without a great deal of qualifications to the answer.) As for reducing fuel consumption for a short outing. If you're charging the batteries with the generators then you're not saving anything, if you're charging at the dock then you're just displacing the emissions and again, it might be more or it might be less depending on distance to the power generation state, efficiency of the power grid, type of power plant, efficiency of battery chargers, etc. In general, point-source fuel use creates fewer emissions, but like I said, there are so many factors involved it can go either way. They've got a bunch of best possible scenarios there, like the idea that the owner is going to idle along at 7 knots, well below hull speed, instead of shooting off at the 22 knots of cruising speed advertised. So, ultimately, my point is, what's the point of this thing? Complexity? Moving around energy enough times that people lose track and think they're getting something for nothing? Boasting to your friends you have a 'hybrid?' I don't have any experience in power boats of this size, is it often a problem maneuvering because the engines don't idle low enough? This doesn't strike me as a fishing boat and I doubt (and this is just an unjustified assumption on my part) that the owners of such a vessel would spend the kind of additional money, and put up with the additional complexity and reduced performance just so they can sneak out of the marine early in the morning without waking their neighbors. I also didn't see it described that the electric motors could work in tandem with the diesels for additional total power, but they were two separate systems that could drive the same props but not at the same time. They say they have orders, and that's fine, I hope their owners get the value they want out of these. Anyone selling and using electric motors on boats is a good thing as far as I'm concerned even if the specific application seems to be driven more by marketing and sales than any sort of efficiency or other ethical consideration (that's fine, that's their job.) Its not really the product I don't like, its the implications in the way its described which strikes me as dishonest. David On Tue, Nov 23, 2010 at 11:40 AM, qc_ca_666 <qc_ca_666@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
--- On Tue, 11/23/10, qc_ca_666 wrote:
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Re: [Electric Boats] High end electric/diesel yacht
qc_ca_666
Hi all!
The big detail they leave out of these materials is the batteryExtract from their web site: ========================================================= Autonomy Lithium-ion batteries are currently used due to their high energy density. Other traditional lead batteries and zinc-carbon batteries have a much lower energy density. Two battery packs to choose from are available for the Magellano 50: a 21 kWh battery pack (range of 5 nm), or a 42 kWh battery pack with a range of over 10 nautical miles at zero emissions. For a short daily outing of 20 nautical miles, this means an average 50% reduction in diesel consumption (compared to sailing at 7 knots on diesel power) ========================================================= Pierre |
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Re: [Electric Boats] battery source
--- On Tue, 11/23/10, GeorgeK wrote:
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Re: [Electric Boats] battery source
Hello,
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You may want to check out US Battery company. They have many dealers and there batteries are sized similar to Trojan battery's with many gulf Cart size batteries. I have used US Batteries to replace Trojan in a electric car I had a few years ago. Happy Boating, George Kuck Chestertown, Md. --- In electricboats@..., "Myles Twete" <matwete@...> wrote:
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Re: [Electric Boats] High end electric/diesel yacht
David Goldsmith
50 feet and 850hp is mid-sized now? Its all relative I guess, but that's not really the crew I run with. Filling up their 800 gallon tanks would cost more than my entire electric conversion will. The big detail they leave out of these materials is the battery capacity, they say the two 23kw (!) motors will run the boat at 8 knots, but for how many miles? Who is willing to bet its under 8 and the whole electric drive system will be removed within five years.
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The stated range of a 1000 miles on 800 or so gallons of fuel is a pretty big tale to tell, and all that junk about a 'hybrid' hull that is a cross between a round bilge displacement boat and a V-bottom planing boat, come on, and just because it wasn't enough of a contradiction they throw in prop tunnels just to make things even less efficient. If docking without the engines running is really so important that all that extra machinery is required then that's great, but at this point a project like this is so cynical and so removed from anything resembling 'efficient' or the implied 'green' of being a 'hybrid' it becomes a joke. If I had the seven figures to throw around on a yacht I'd do a little more due diligence than talking with the salesman and try to find something really innovative, something that pushes the state of the art and does something new. I hate to keep piling on, I mean, I do love boats, any boat, and I'd sure take a ride on this guy just like anything else and the guy that also loves boats and loves this would probably shouldn't have nice things to says about my old sailboat and that's fine too; but the styling, its like an over grown circa 1995 Sea Ray. There is so much really striking and beautiful design out there in the 'mid-range' yacht world, this thing doesn't do it for me. David On Mon, Nov 22, 2010 at 10:04 PM, fulldec2001 <fulldec2001@...> wrote:
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High end electric/diesel yacht
Too rich for my blood, plus I think I may have a bridge clearance problem. From BoatTest.com:
"Azimut is electrifying the yachting world with its new Magellano line of fuel-efficient long-range cruisers, including this 51' 4" (15.64 m) Magellano 50. Introduced at the Genoa Boat Show in October, she is the mid-sized entry in the new series (a 74 is already available, and a 40 is in the works). Not only is the 50 a radical departure visually from Azimut's Med-style cruisers, noted for their speed, sleek styling and sybaritic accommodations, but it also has something few other yachts at this level have -- the option of hybrid power: Azimut's Easy Hybrid system adds twin 23-kW electric motors to the Magellano 50's twin Cummins MerCruiser QSB 5.9 diesels, and will move the yacht at up to 8 knots under battery power alone, in near-silence, says the company." Here's the link: |
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