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- เผยแพร่เมื่อ 29 ก.ย. 2024
- This week we have a look on Marcel's from Leopard Catamaran, advice on Wind Generator and Hydro Generator. I investigate whether his choices were solid choices. I also explain what our choices are and why we made those choices. And we show progress of Sisu on the factory floor!
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We purchased a Leopard 45 Catamaran to sail around the world and now we are going through the preparations of getting her kitted out for our needs. We want to visit off the beaten tack places and need to prepare for ice bergs, storms, heavy seas, as well as nice tranquil tropical waters...
Follow us on our journey as we learn from legends when Sailing La Vagabonde upgraded from a monohull to a catamaran...SV Delos wants to upgrade to the latest Amel 51 monohull....Gone with the Wynns chose a Leopard Catamaran....choices choices choices. We looked at other sailing channels such as Wicked Salty, Satori, Jessica and Ryan, Catamaran Impi, MJ Sailing, Happy Together, Sailing Uma, Sailing Yacht Ruby Rose, Zingaro, Miss Lone Star, Sailing Doodles, Drenched, Lucky Fish gets Away, RAN Sailing, Out Chasing Star, Follow the Boat, Rigging Doctor, Sailing Lady Africa, Abandon Comfort, and many others to find our answers and solutions, whilst we prepared our yacht in Cape Town, South Africa.
Very old (2007) Wind Generator comparison: www.info-center...
Good Wind Turbine site to check the different models and specs: www.emarineinc...
Luckyfish Gets Away with Hydro: • FREE ENERGY - 1000 Mil...
OK, after three years sailing 23,000nm over 80 latitude degrees...that is from Cape Town to the Black Sea. We also crossed the Atlantic and did a lot of downwind sailing and now Trade Wind sailing. We are heavy on electronics (power hungry graphic laptops, Wi-Fi, hard drive storage server for our videos, cameras chargers, nav instruments, etc.) and use the electric kettle every morning for coffee. We have a microwave, an Instant Pot, and a still, washing machine, and water maker on board. Here is our experience:
1) The wind gens are a disappointment. We can run only one because there is something wrong with the mount of the starboard side wind gen, because it is vibrating a lot. We have changed blades, changed gens, but still a lot of vibration. The port side is running with less vibration, and it is always free to generate power. That said....here in the Trade Winds or downwind sailing, it only starts at around 7kts of wind but brings in 2.4W in. It only starts to go above 120W with over 20kts of wind, which is a rare case at anchor in the Tropics, or while anchoring on the lee of land. We saw 380W in a 50kts blow at anchor, but that was too scary to worry about power generation! So, it is trickle charging at the best of times. Not sure if it is worth the money. They are a good warning of gusts though! They start running up long before the wind instrument shows any signs of a gust ;-)
2) The 1.4kW Flexible Solar on the roof. They bring 600W on average on a sunny day in the Tropics. The 1300W on the aft arch (well ventilated) brings 800W in the same conditions. The solar are by far the best provider of power. We battled in rainy season areas such as Amazon jungle, or high latitude winter times. We had to run the engines quite often like every three days while at anchor for longer than three days. We sailed a lot in the Mediterranean, but as you all know, MED = Motor Every Day. So, we had to motor sail a lot, which topped up the batteries.
3) No Generator, but two additional alternators. I still think we are better off without a heavy genset and extra maintenance of another diesel needing filters oil changes and service. However, that is at the cost of putting more engine hours on the main engines. We learnt to use the engines while sailing to top up the batteries if required. For example, if we see that we need to charge the batteries, then we will move to another close by anchorage we wanted to check out and motor over, or instead of tacking the last 2 miles to the anchorage, we will drop the sails and motor, if too far out, we will go 30AWA towards the anchorage with the genoa sheeted in tight using the engines. The four alternators bring in 1,500W @ 1,100rpm and 4,000W @ 1,800rpm however, it will cut out every now and then because of overheating at the higher revs.
Oh...we have 12kW of Lithium batteries. They only got to 100% with solar in the Tropics in non-rainy season.
Thanks so much for the very detailed reply. Much appreciated.
What is your daily energy usage at anchor and underway? From your description it sounds like you consumer hundreds of amps per day.
about 8kWh per day.
@@SailingSisu thanks, sounds like 2000-2500 watts of high performance solar (sunpower, solbian solar, etc) would keep you going indefinitely.
From personal experience, I would just fit as much solar as you can, split up with 2 or more MPPT controllers for redundancy and performance.
Wind generators can be noisy and get in the way depending on where its fitted on a cat.
Hydogenerators are another item that can be a hassle to use and store.
Monohulls tend to use wind generators more because they don't have as much flat area to mount big solar arrays compared to a Cat.
Solar has the best cost to performance ratio and is more reliable when combined with enough, efficient electrical storage.
Have a look at this guy's review > th-cam.com/video/cMENm_7MenY/w-d-xo.html
ep 11 th-cam.com/video/wDhpkHN_AQY/w-d-xo.htmlm55s (12:55)
Yep..I would do as you described in your Ep 11... I have a mate with a Schionning Cat and he has used multiple Solbian panels and he swears by them. Great quality, tough and very efficient. Their downside is cost, however "you get what you pay for".
With enough LiFePo4 batteries and a sizable inverter you could run most things without even starting the genset.
The genset could be used if you were going to run very high current draw appliances or a/c for short periods if required and of course you can charge batteries whilst it is operating.
Whilst motor sailing your additional engine alternator can also top up the batteries. I believe that the solar will keep them charged anyway.
I really don't think you need the added complexity and maintenance issues of wind and hydrogenerators if you have a good quality, "well designed" solar system and energy storage capabilities.
For interests sake, have a listen to this wind generator > th-cam.com/video/_7zdhPUyXfk/w-d-xo.html
Yes, even on Delos videos, one can hear their wind gen...pretty noisy buggers! But read my pinned comment ;-)
I agree, wind generation is noisy. And hydroelectric doesn’t work when the boat is not moving. I would double down on solar.
Great Review Sir!
Michael, thank you for the kind words!
Both ... one of each ... ;)
I am contemplating it
Check out la vagabond's issues with the watt and sea, not a good advert
slv is the top channel followers wide and i still watch all the videos, but i am getting a tad bit irritated by the drama queen :-) yes, i noticed the issues (also noticed the issues with the outremer :-) ) i looked at the volvo ocean race's website (and the individual team's) for technical issues experienced, but could not see the same issues. perhaps the volvo ocean race is using the racing version which is higher quality, do not know. but yes, not a good one for watt&sea if 300k viewers see problems :-) the smaller channel like lucky fish, had no problems....not sure what to think of it really? hence the reason why i want to test and see for myself.
Sailing Sisu, the expensive racing version may be made for higher speeds and rougher use, the difference between La Vag and Luckyfish is about 10 kn in speed, i agree SLV it edited for max drama I prefer Delos.......
@@lnewbyliveca All the channels you discuss are E BEGGERS!!!
mould
?
Dont forget that at high latitudes you will be visiting in summer wich means a lot of hours of sun. I live in the north of Sweden and i installed solar waterheating panels on my house 10-12 years ago. Works great mar-okt. Summertime it never gets dark outside.
Micke, I agree fully, keep in mind that solar panels on the catamaran will be a) flat mounted, b) moving and tilting all the time into and out of the sun, c) the sail and the low sun angle will definitely work against each other. I have been many times to Copenhagen, been to all three ice hotels in Sweden, Norway, and Finland during a road trip, loved that part of the globe! Yes, in summer, the sun in those parts will be much more higher and the solar panels actuall increase their output with as much as 15% during cold times :-)
Sailing Emerald Steel, has some interesting ideas. He claims that people worry too much about generation and not enough about storage of electricity.
I will try to find the episode and post it later this afternoon.
Ok, I am back from work. The episode that Jules talks about power is, “Living off the grid for 30 years”. It could be interesting for you. Also, the water generator that is tows could be cost and power effective for you.
Thanx, Phil! I will look into that
One thing to keep in mind about wind generators.
1. You want one that starts producing and start turning with as Little wind as possible.
2. You want one that dont make to much noise so that you can sleep well at night.
3. You want one that you can turn off safely.
4. Look more which produce most around 10Kn or whatever is average.
5. Remember the reason why you want a windgenny… Probably to generate Electric when the sun is not shining because it is dark and when the hydrogennie is not because you are on anchor.
Hydrogenerator - You dont want the one that you are pulling behind the boat. You want the one that you put down by your sugarscoops.
I would get 1 wind generator and 1 hydro generator.
After one year of sailing, I think you are absolutely correct! Thank you for watching and your kind advice! Have you watched our non technical videos? Did you like them too?
Just a thought, the biggest downside I see to wind generators is when sailing downwind especially in a fast catamaran your forward speed cancels out alot of your affective wind speed. It's dificult to get a perfect solution for all circumstances in one unit.
My thoughts exactly, but I am sure (I hope) Frik is aware of this. 😁
Jip, I actually mention it in the video :-)
I have done a lot of research on wind generators and I have learned two important factors. You always want an odd number of blades for balance and it takes less wind to turn five blades than it does three blades. Jon
Thank you for watching and your kind advice! Have you watched our non technical videos? Did you like them too?
To all the happy people out there... I agree that at the moment, it would appear solar is the best energy gatherer and that one needs to focus on how to store it. It is my goal too! So, I agree, but unfortunately, I am one off those guys who want to see for himself what the fuss is about. For example I had all the iPhone (still do not like them), I had all the Windows phones (still think they are the best OS), and many different Android phones (love them!). I also went PADI and NAUI from first course to dive master on both...just to see what the fuss is about and also so I can speak with authority on both experiences (off course from my own perspective too :-) ) So, if I do want to go with electric motors one day (not possible with today's technology) then I would want to know from my own experience, what is the pros and cons for each :-) Just my style, sorry!
100% agree...no better way to learn than to experience it yourself...oh and I also love Android !
One diesel, one electric with hydrogenerator, thinking about redundancy, if you got bad fuel, you got electric backup. Any thoughts?
I am considering it, but will be maybe after some time
Nothing wrong to be curious and test out things by your self and use others experience as a light guide.
You should have a generator , even if it’s small 3.5-5 k Watts . Doesn’t take much room and everything is about back up. I was in military aviation, ch-47, and I believe in it(backup).
i am looking at a DC gen ;-)
Length of blade , introduces sound shorter quieter. Most complaints I’ve heard are about noise. Max wind speed is a concern. Your well tied up because of a hurricane and can’t use your generator because of over speed issues, no electricity. Nobody seems to have pitch control, as in aircraft. You can feather the prefop .lots of thoughts . In the ideal world you would have air and hydro
One viewer André Rimkus
, introduced a view comments earlier, to Superwind, which does have a mechanical feather control for high speed winds, but that one weighs almost twice as much as the silentwind and only starts at 6.8 kts... so, i am in thinking mode again :-)
Luckyfish also found room to mount 2 Wind Vanes (one on each hull). I have watched all of your videos, given a Thumbs Up, and loved all of them. Unfortunately, I do not remember if you discussed Wind Vanes in any of them as backup and power conservation from using the AutoPilot. Would like to watch it again if you have already discussed Wind Vanes. Hope you might clear up my confusion about ParaSailor (sp?) sails next week when you talk about your Code 0 and Code D sails. Really look forward to seeing next week’s video. Thanks.
Jack, awesome to meet a fan who suffers through my boring voice and no action! Yes, I only realized afterwards, in my excitement, I did not tell the viewers that that picture of the aft deck, was actually the first fiber glass panels for Sisu! R&C takes around 10 weeks from lay-up (the start) to splash. So, around 1 Sept is splash date (for now, we had already 3 delays) 10 Sept handover, then my birthday party, and then handover to Marcel to put all the crazy stuff we discussed so far for after sales options, on Sisu... I am afraid, we will only sail away around 1 November.... So, sorry for the boring voice until then! :-)
Jack, about the wind vanes...I do follow lucky fish as you saw in the video :-) and I do notice on many channels the wind vane. and you do get the wind vanes which are made for cats, but i am still very unsure of that one. I am considering two auto pilot sets too, but Leopard and R&C both assures me that I do not need spares for the autopilot. so, i am still in limbo mode on wind vanes. i do know the advantages, i have researched them, i know how they work, i know their limits and advantages over electronic autopilots, so, i do know a lot, but still not sure i want it. but please, if you want it, then i will share what i learnt from wind vanes :-) just let me know!
If you can fit more solar panels, I would cover the roof, this is relatively cheap. Then use lithium batteries and ultra high output alternators on engines as backups. You can DIY a LiFePo4 house bank for 1/4 of the commercial marine prices, with the same monitoring and safe guards. No wind or hydro, you'll mostly be at anchor and won't want wind, low apparent wind speeds can also hurt performance here on passage. Hydro only works on passage, where you'll mostly be in fair or good weather often in the local summer, so solar works great. It's very feasible to get 7kwh+ daily from solar on a cat and also works naturally to do your high loads during the sunny day, like making water or laundry. I'll be fitting 2.2-2.5kw of panels on my cat's roof, no genset, 10kw lithium bank. I expect to very rarely need to run the engines to charge the battery, i'm even expecting to get ~3 hours aircon runtime each sunny day. The lithium batteries are key, they give every charge source you have more effective output. I can also very easily cut out half or even 3/4 of the daily load if we need to conserve power for a couple days during a storm, but an hour on a cat's dual 3-4kw alternators also gets the job done (to bring the battery back to full).
Thank you, Derek! Yes, my idea too. But for a start, I just want to see for myself what fuss is about :-)
Check out advanced RV, they have a lithium system with a 4 KW engine driven DC alternator. I know it's not marine, but when I need a fan, light, water pump, I go to the RV store, LOL
Very true, will check that out as well. I'm currently waiting on a quote for www.electromaax.com/products/marine-alternators/genmaax/
Don't forget that lithium batteries can sustain irreparable damage at low temperatures so anyone sailing north Europe outside of summer will not want lithium wighout some kind of heating system. If you are sailing the carribean then good Stuff! 👍
Love ur videos, love u both but tell us more about updates snd not the tech stuff. When is the darn boat ready?
Yes, Gary, I only realized afterwards, in my excitement, I did not tell the viewers that that picture of the aft deck, was actually the first fiber glass panels for Sisu! R&C takes around 10 weeks from lay-up (the start) to splash. So, around 1 Sept is splash date (for now, we had already 3 delays) 10 Sept handover, then my birthday party, and then handover to Marcel to put all the crazy stuff we discussed so far for after sales options, on Sisu... I am afraid, we will only sail away around 1 November.... So, sorry for the boring voice until then! :-)
A big consideration for wind generators on a boat is noise. Look for good performance AND quiet. You will enjoy it and your neighbors will appreciate it.
Personally I would not add a wind generator. Add more solar panels and better batteries as has been suggested by others. Look at "Gone With The Wynns' video on their solar installation. They even have AC. I don't know much about hydro units. Know "Luckyfish" likes theirs but "LaVagabond" had problems. Good luck.
I agree, but unfortunately, I am one off those guys who want to see for himself what the fuss is about. For example I had all the iPhone (still do not like them), I had all the Windows phones (still think they are the best OS), and many different Android phones (love them!). I also went PADI and NAUI from first course to dive master on both...just to see what the fuss is about and also so I can speak with authority on both experiences (off course from my own perspective too :-) ) So, if I do want to go with electric motors one day (not possible with today's technology) then I would want to know from my own experience, what is the pros and cons for each :-) Just my style, sorry!
Not everything needs to be purchased straight up. why dont you get the boat first, assess your real needs and then move forward. it might save you some money
Boat construction started three weeks ago :-)
I'd go the C Adams route...as much state of the art solar as you can fit comfortably aboard.
With two 200ah alternators, and a Honda 3500 Genset for emergencies.
Sorry for copy and paste :-) but just for in case you do not see my previous comment. I think solar is absoluut value for money but my previous comment...
"I agree, but unfortunately, I am one off those guys who want to see for himself what the fuss is about. For example I had all the iPhone (still do not like them), I had all the Windows phones (still think they are the best OS), and many different Android phones (love them!). I also went PADI and NAUI from first course to dive master on both...just to see what the fuss is about and also so I can speak with authority on both experiences (off course from my own perspective too :-) ) So, if I do want to go with electric motors one day (not possible with today's technology) then I would want to know from my own experience, what is the pros and cons for each :-) Just my style, sorry!"
Also...the sun angle may be a lot less, but it is out for 20hrs per day. 👍
Assuming you arrive during summertime time.😂
Tom, I would not dare to go in winter time :-)
Hey Frik, hope all is well with you guys, I know this vid was a while back but question, you went for 2 x wind generators. I don't think I've ever seen them working when watching your videos. Were they a good buy and necessary or not? thanks
OK, after three years sailing 23,000nm over 80 latitude degrees...that is from Cape Town to the Black Sea. We also crossed the Atlantic and did a lot of downwind sailing and now Trade Wind sailing. We are heavy on electronics (power hungry graphic laptops, Wi-Fi, hard drive storage server for our videos, cameras chargers, nav instruments, etc.) and use the electric kettle every morning for coffee. We have a microwave, an Instant Pot, and a still, washing machine, and water maker on board. Here is our experience:
1) The wind gens are a disappointment. We can run only one because there is something wrong with the mount of the starboard side wind gen, because it is vibrating a lot. We have changed blades, changed gens, but still a lot of vibration. The port side is running with less vibration, and it is always free to generate power. That said....here in the Trade Winds or downwind sailing, it only starts at around 7kts of wind but brings in 2.4W in. It only starts to go above 120W with over 20kts of wind, which is a rare case at anchor in the Tropics, or while anchoring on the lee of land. We saw 380W in a 50kts blow at anchor, but that was too scary to worry about power generation! So, it is trickle charging at the best of times. Not sure if it is worth the money. They are a good warning of gusts though! They start running up long before the wind instrument shows any signs of a gust ;-)
2) The 1.4kW Flexible Solar on the roof. They bring 600W on average on a sunny day in the Tropics. The 1300W on the aft arch (well ventilated) brings 800W in the same conditions. The solar are by far the best provider of power. We battled in rainy season areas such as Amazon jungle, or high latitude winter times. We had to run the engines quite often like every three days while at anchor for longer than three days. We sailed a lot in the Mediterranean, but as you all know, MED = Motor Every Day. So, we had to motor sail a lot, which topped up the batteries.
3) No Generator, but two additional alternators. I still think we are better off without a heavy genset and extra maintenance of another diesel needing filters oil changes and service. However, that is at the cost of putting more engine hours on the main engines. We learnt to use the engines while sailing to top up the batteries if required. For example, if we see that we need to charge the batteries, then we will move to another close by anchorage we wanted to check out and motor over, or instead of tacking the last 2 miles to the anchorage, we will drop the sails and motor, if too far out, we will go 30AWA towards the anchorage with the genoa sheeted in tight using the engines. The four alternators bring in 1,500W @ 1,100rpm and 4,000W @ 1,800rpm however, it will cut out every now and then because of overheating at the higher revs.
If there is no wind and you have to motor, you are always moving through the water!
Sure, but if I look at other sailing channels, then one spent most of the time at anchor
Excellent video, the presentation was superb, a pleasure to watch. Loved your comments about the aesthetics, so important that it looks right.
Thank you, Andy! And thanx for watching!
Hi. I might have missed it, but are you guys installing air conditioning?
EP 8 th-cam.com/video/VIg-J0HoWm0/w-d-xo.htmlm3s (7:03)
Excellent video, the presentation was superb, a pleasure to watch. Loved your comments about the aesthetics, so important that it looks right.
Thank you, Andy for watching and your kind words! Have you watched our non technical videos? Did you like them too?
The Volvo ocean race used Watt and Sea because the were given free of charge in a sponsorship deal I imagine
Lol, did not know that!
Sea wind is to week produktion. Dont think more sea and solarcell rules.
and now we are even thinking of ditching the 'silent wind' because they are not silent at all!
Why not both. He'll solar too.
I am considering it! :-D
I would put extra solar panels if I were you. Just a thought so.. best from HKG
Definitely!
I also pinned my thoughts on top...
Great video, just the important things:)
Thank you!
So many choices! Very informative!
Thank you!
Can't you use 2 wind generator and 2x hydro generator?
Hydro is for sure an option where there is no weed/grass in the ocean.
😀👍🏻
thank you and thanx for watching! Hope you like our sailing videos as much as our technical videos?
An actual custom theme song. Nice work.
Thank you, Steve!
Solar panels > Hydro generators > Wind generator
I am now considering only solar 🤔
I was thinking about Lucky Fish and see you already have him down as a reference, I love his explanation and showing the practical use of the Hydro Generator, which is my personal preference as a backup to the Solar when the sun is not shining in overcast weather. I still like the Wind Generator concept, primarily Wind and Hydro are backup energy sources to Solar, so Solar is the primary way to go and primary focus to get started.
I agree fully! Our primary generator will also be solar. For a start, I would like to watch what the solar will give and what shortage we would experience. Then I will make my own mind up about which way to go.
You need to have extra props for the hydrogen, see what “LaVagabond” had to issue with, they broke the blades when it was chasing downwind, and then it doesn't work as it should. Just ahead Up Sir.
Thank you for watching! yes, i watched that SLV episode as well. Luckily, we have a must heavier cruising cat with lots of comfort :-) we will never reach their speeds! That said, I placed the hydrogen on hold for now as you can see from episode 28...but if I do get them, then extra blades will be on the invoice! thank you!
You’ll make more solar on rainy day then kw/h on wind turbine
Really? I've been working with solar quite a bit. My last UN project I had 2,000 teams in the field and each relied solely on solar... Cloudy days were a nightmare
For both wind and sun energy you don't need to sail.
But I do want to sail 😉
@@SailingSisu We all want to sail, yet a lot of time is spent at anchor. I'd therefore choose to have both solar and wind power sources; there's often wind when there's no sun and vice versa.
@@casybond Ah, I misunderstood then :-) we do have both, but I will put out a video about my findings after three years using both ;-)
Did not understand a thing
Francisco, apparently as a coach sailor myself at that stage, neither did I! I am at the moment thinking hard about changing my Silent Wind gens 😏 thanx for watching it and trying to make sense of it all!
have seen lots of air generators, people seem to like them, the water ones, seem to break the props off alot,
not sure why but perhaps they reverse into the marina? the Volvo Ocean race think they are good!
Seen water world?
Yeah, few times
Solar solar solar. Rest waste of time
I agree, but I also want to test that theory
Be careful, some of these units cut out at 30 knots like the silent wind... So when the weather is crap and solar is reduced that's when you need the power. you want to go to Antartica, You will get 100 knots of wind down there.....
Hi, Rustie is it possible to point me to where the info is on silent wind cutting out?
Hi Frik, what is your experience after a lot of miles? Do you sre still happy with your decision on the Watt and Seaand the energy setup at all? BR Thomas
Thomas, I did not go for hydro gens, only silentwind, and Silentwind was disappointing... A lot. The Bluetooth is crashing and useless, the wind gens starts at funny times or not at all, snd if they do, they are vibrating the whole boat
@@SailingSisu thank you very much Frick.:-) So the watt and sea is still no option for the passages? I like your detailed planing and explanation of things you consider. Maybe a video about "what we thought and what we learned" would be interessting. Things you would do today different if you start again or wich were the good/best decisions you made. I would like it;-) fair winds and following seas.,
About the S&W, I was not sure about the sea grass and stuff in the water, but so far, only a few places it would have been a problem. The second issue is the speed. They have different props for different speeds and I had to experience myself with what speeds I could get with Sisu. We definitely go 5-10 kts most of the time so, I can now make a better informed decision. The wind gens are quite frankly and frustratingly, a disappointment. Even the roof mounted solar. But as they say, every little bit of Amps help, not sure if it is worth the price, but we only need to run the engines every 5 days if we work conservatively and being in the Med, which stands for Motor Every Day, we pretty much stay topped up.
@@SailingSisu
Hello Frik, I totally can understand that. Regarding the solar panels. Have you seen this video from the O-Kellys? th-cam.com/video/o6kOvjS1ytE/w-d-xo.html @2:40min. The owner folded something under the panels to improve the air circulation and lower the temperature and increase the output for the panels.. I have no personal experience with it, but it looks logical and promising to me.
@@Thomas-mn5ih I know that airflow cools the panels down and increase efficiency, however, our aft panels are 100% in the air... They are marginally better
Not even an emergency generator?
we are thinking of a DC gen
Both... always go both...
Good advice!
Why not both?
In fact, I am removing both :-D
@@SailingSisu why?
well, they do work as advertised, but in 30kts of wind, which environment sailboats are not fond of 🙂
@@SailingSisu it makes sense what you said
You talk too much. If you want to help us; just get to the point.
lol, if I said $742k in 1 second...then I would have received many more comments! But for guys like you :-) TH-cam did add an amazing thing, the video slide or scrubber tool. You can slide to any point in the video with one click and since you think I will make the point at the end of the video, then just slide to the end where I say $742k :-)
Any thoughts on a servoprop setup? 1000 watts at 7 knots, quiet motorsailing, $20,000 OUCH :-)
Yes, I did...currently one needs a big very big battery bank....
yeah but the same big battery bank feeds all of you electric apliance washer dryer watermaker nav equipment pumps etc and motorsailing is only a very smal part in and out harbors and moorings the rest of the time you have a fast cat that can sail with very low wind
true
Tesla powerwall, 13.5 KWH, 5kw inverter, 275 pounds, $6000 ??
Axel Weimann I was looking more at the hydro gen performance of the servo prop, 1kw at 7 knots
Blah Blah Suid Africa.
South Africa...or....Suid Afrika? Are you a fellow South African, Andre?