开云体育

I have a Sabre 28-2 with a 30 hp Atomic 4 engine. What size electric motor should I consider?

I have installed an electric drive on my sailboat using a kit supplied by Electric Drive Engineering in Western Australia. It uses a Motenergy 10kw motor in conjunction with a Sevcon Gen 4 size 4 controller and Opus display. I have adapted the system to output to my original sail drive. The system is only used to get in and out of the morning pen and has clocked up about 10 hours use over the last 10 months or so. It has worked flawlessly until now. A couple of weeks ago, I went out for a sail and on the way out everything was fine, but about 4 hours later when returning to the pen, it refused to function. The line contactor is working fine with 48V either side when actuated. The Sevcon controller is not showing any error messages with a solid green indicator light and I am not getting any error info from the opus display. I have removed the coupling between the motor and gearbox and both rotate freely when not powered up, however when I power the system up and select forward/reverse and apply throttle, the output shaft of the motor locks completely with the amps ramping up considerably. With no throttle but in gear I can also detect noise from within the motor indicating it is attempting to turn at about 2 or 3 second intervals. The unit came with the controller and display set up by the supplier. I have checked all the connections and am getting the full voltage at the controller. Hoping someone might have some advice...

Anybody interested in a San Juan 24 in the seattle area? Cheap Needs a motor Cheers

I'm installing an Need 48v 200A for Electrictyacht 10kW motor, in my Catalina 27, should 1 get 4 x NPP12V 200Ah Li ($2200) or 2 Dakota 48V 96Ah ($5000)? Electricyacht says 48V is better for load balancing. What about safety and reliability of NPP vs Dakota? https://electricyacht.com/product/quiettorque-10-0-sport-electric-motor/ https://www.amazon.com/NPP-12-8V-200Ah-Phosphate-4500-8000/dp/B0CL95VJ82 12.8V 200Ah Battery, we suggest you buy 4 units and the total weight is 176.36 lbs. We had applied the best offer for you, is $550 per unit. The total price is $2200. The lithium battery are with long life and more than 4500 Cycles. Only half weight and providing twice capacity in the same size as lead-acid batteries. https://dakotalithium.com/product/dakota-lithium-48v-96ah-deep-cycle-lifepo4-marine-battery/ The Dakota 48v 96ah batteries at a discounted price when you pair them with one of our motors. Normal cost is $2699ea, your cost would be $2500ea. The Lynac 48v 100ah and 48v 130ah batteries are certified grade A cells and have Bluetooth capability. 48v 100ah= $2557ea 48v 130ah= $3297ea

Hi Folks, Another question – the boat that I’m looking to purchase is a Pearson 10M that has been converted to electric drive via a bank of Lithium cells for the drive and two AGM batteries for the house functions. The owner removed the stove it came with and sold it to help finance the electric conversion. In it’s place there is now the stowable countertop that would have covered the stove, the mounting spots from the gimble and a truck fridge which will come with the boat. Overall this is fine with me as I don’t really plan to need to bake a bunch and using a simple cartridge stove mounted on a holder that is gimbled will be fine for my purposes. My question is this – my understanding is that alcohol stoves are common on sailboats to reduce the potential to have build up of explosive gasses from, for example, propane. I have a two burner propane Coleman folding green camp stove that works great and sees very little use which I would love to put in this spot. An alternative would be a butane stove or even an induction stove. Is there any concern about use of such a stove igniting gasses from the Lithium batteries in the bank that resides in the quarterberth on the opposite side but which is in the same space as the galley (i.e. not separated by a bulkhead). What is the safety concern for Lithium cells ? If they are in good shape and have enough air circulation is that enough or are there other concerns that might encourage use of induction, despite the power drain it can create. Thanks, Scott

Hello everyone, Alex from SV Frolic here, with some technical questions as I’m trying to build a system. My boat is a 1973 Columbia 30 (not the sport sailer with an open transom, but rather the raised deck one). I’m wanting to do a 48v battery system totaling around 400Ah, and convert to electric. Herein lies the issue: my boat was originally sold with a gas motor, a Palmer P-60, mated to a v-drive transmission. I haven’t found much information as to the conversion process to electric for v-drives. And I’ve heard many people say they are touchy, sensitive transmissions as well. I’ve seen plenty of reduction gear setups for direct drives, even electric outboard builds, but nothing for a v-drive. That’s issue number one. Furthermore, I’m not sure what size motor to go for as I’m replacing a 4.0L 60hp inline 4 gas motor with plenty of torque (well, probably back when it ran). the displacement of my boat is factory 6 tons but in practicality I’m finding it’s more like 7 tons, or about 14k lbs. I’m new to EV’s and mechanically handy, but I’m fed up of this rusty old gas guzzling hunk of junk that always needs SOMETHING else. I’m dying to get out of the marina and shipyard routine. I miss my sea time. Thanks for your help.

I am back with more questions for the group. As you may recall I did this build, /g/electricboats/message/31909 with your help and wanted to let you know that this system is still working great. Now for the electric outboard idea/question. The boat is used for fishing on the Potomac River utilizing the 1997 150 HP 2 stroke (that left me stranded the other day for the first time) and it is also used in some electric-only lakes utilizing the 36-volt trolling motor (thread above). Being stranded the other day was not a great feeling and I was too far away from the marina to get home with the trolling motor and battery setup I have. This got me thinking... an electric outboard could serve as an emergency kicker motor and allow me to venture further into the electric-only lakes. Distance: on Google Maps I plotted out a distance from my furthest fishing point back to the marina I frequent. I ended up with approx 8 miles, let's round that up to 10 miles. Speed: my 36-volt trolling motor pulls me along at an average speed of 3.5 MPH according to my GPS... If I could get 6 MPH that would be great but distance is more important than speed for a self-rescue. Boat specs: Hull Material: Fiberglass, Beam: 7'7", Length: 20', Net Weight: 2250 lbs. I think a 48-volt setup would be better than 36 volt but I am open to all suggestions. If I go 48 volts then eventually I could replace my trolling motor with a 48-volt setup and have maybe 30 or 40 extra Ah of capacity in an emergency.

I’m looking at buying a Pearson 10M that has been fitted with a Thunderstruck 10k and bank of 4 lithium battery packs for 196 AH 48V. All that checks out and fits fine with my needs and wants for the boat. The current owner did the install and it looks good. A couple of questions based on my reading: The boat will get stored somewhere around Lake Ontario outdoors over the winter. From what I read, it is best to store the batteries somewhere so they don’t get subjected to sub zero temps so I plan to just pull them and put them in my basement over the winter. Also it seems it is best to have them somewhere around 80% capacity – i.e. not full charge. Looking for tips on keeping the batteries safe while sailing – they are installed well under the starboard cockpit seat and rear quarterberth area. I don’t plan to sail in extreme weather and the area looked perfectly dry when I checked the boat out in the marina and out for a short sail in very very light breeze. Just wondering what sort of precautions aside from securing them very well people take to make sure the cells are never exposed to water. Basically this is a question asking, assuming it is well installed, are there some upgrades or best practices about insulating the connectors and such that can help further reduce issues that could be encountered – this is the nightmare scenario of a fire starting. Thanks, Scott

I was looking around and found EVE LF105 3.2 LifePO4 fo $60 per cell, 16 cells for $960. This is a company in Georgia USA. Good price? What are you all currently using?

Anybody looking for a San Juan 24 in the Seattle area? Sails good Sails fine No Motor doesn't work But my moorage won’t work out this winter And must get rid of it Open to any offers Thank you

Hi All Very fundamental beginner's question here. I currently have a 160amp hour 48-volt closed cell battery bank running a thunderstruck 10KW motor and all works well. ( Looking forward to lithium in the future). QUESTION: If I am charging the battery using solar panels - or in some cases a generator - can I run the motor at the same time? There a several claims on Google search that you cannot charge and discharge a battery bank at the same time. If you are running solar panels ( which I am about to install) - I can't imagine that you switch them off each time you want to run the motor. Can someone please clarify if I can charge and discharge simultaneously, or will this damage the batteries or create other issues? The expert help from this group is very much appreciated. Richard

Hello, New to this group. I just purchased a Pearson P27 1989 model last spring. The engine is shot. I pulled it out and had a mechanic take it apart. He said it is a goner. Since I only have a prop shaft in the sailboat now. I am thinking of taking this opportunity to do an electric conversion. Where is the best place to get an 8kw motor with controller? Also, I need a mount and prop shaft coupling fabricated to make the motor fit the old diesel mounts and prop shaft. Thanks!

dear knowledgable members, with pleasure i've read your interesting, thorough and often detailed post - what a joy to see so much expertise. i hope I could make use of that knowledge and ask for advice and recommendations on my little boat. I is a small boat in the canals in amsterdam, just take it out to go cruise along the canals and sometime cross the IJ river for a restaurant/swim/friends on the North side of Amsterdam. It's a former safety boat, presumably built around 1920, riveted steel. 5,5m/18ft long, 5,2m/17ft at the waterline. she is aprox 1.85m / 6ft wide at the widest point. Guesses are about 1 ton without engine etc. These are some speed test i did a while ago; Now powered by an old 21HP 3cylinder diesel i'm looking to change to electric this year. (Amsterdam city government issued rules to ban all diesel engines from the city centre by 2025). I usually have trips of 3-4 hours, that may include the 20 minute full-power (about 11 kmh) trip to the North of Amsterdam (and 20 minutes back). Most of the time i cruise 6-7 kmh (3.5 knots?). I maybe have 20-ish trips a year, also of 1,5-2hours, so say 50 hours a year - all in all an expensive hobby, but with friend on the canals, with a beer or wine and some snacks, cruising to the take-away pizza on the canal, romantic candlelight tours - it makes it worth it (well as long as you can help me do this electrification....) The boat is docked next to my houseboat so charging is no problem. no need for a lot of power but i do need be able to break quickly and have some manoeuvre power, also when i have 8 friends on board. I was hoping on some recommendations on; * power estimates the engine * direct on ax or via belt (what happens with an emergency brake?) * how to mount/install, on the current engine mounts with or without the rubbers (need a custom made frame) * what kind of propellor (don't know what i have now) * brushless or are older/cheaper engines an option considering my hours/year. * power need on 6-7kmh vs hullspeed (10,4? kmh); is if fair to say that at 6-7kmh poweruse is only 30% of the energy that is needed for the hull speed? * what kind of batteries would be advisable for me. the boat is in the water (and could be on power) all year. In Amsterdam it it maybe 10 nights a year freezing a bit, never more then -10 Celcius I've seen the kits from https://www.kit-elec-shop.com and https://www.thunderstruck-ev.com/ but wonder if they are my only (affordable) choice, and, cautious about how to mount them. I realise most of the converstaions here have been on sailboats and mine is different, still i hope you can educate me with your expertise, Thanks, Elwin

dear knowledgeable members, with pleasure I've been following this forum, with a special interest on electrifying my old steel open boat based in the Amsterdam canals. It's a 5,5m boat, just used to cruise the canals at a modest 5-6km/h (walking speed). I've ran into a second hand kit that may work great for me, just thought to reach out before I do something stupid (buy the wrong kit). The engine is a Motenergy ME1003 , though not brushless I see it mentioned onThunderstruck and the European version kit-elec-shop, and the controller Alltrax SPM72400, that I can't find many references of. I'm hoping on advice to use these on a a boat, rather then in a cart. No salt water but always somewhat moist enviremont as there will always be (rain) water in the bilge. I'm quite confident the engine is quite a good fit to my boat. The kit that I could but second-hand is including throttle, relais, reverse-relais, motor-frame and 8 E drive AGM batteries, 6v 330ah. total 3500 euro, the controller and engine are about 1500 together as far as I could find online. Would still require some work on cabling and programming thought. Any thoughts? Thanks from Amsterdam, Elwin

I'm currently building a Cabin Kat, started 2017. 6,35 m LOA, 12 semi flexible Solarpanels on the roof. Two small electric Trolling motors (1.4 kW each) for propulsion a third one (0.9 kW) acting as bow thruster. I hope, I will be able to launch her (in Berlin, Germany) this year for a test in a small river. The boat will be then in an incomplete state (regarding Interior furniture). May be I have to wait with the launch for next year . We will see.

I've been working on this project for a couple years and it's been 3 steps forward and 2 steps back but I'm getting close. I made a video that shows my work, I hope you like it. https://youtu.be/9-Vj_KaCn6Q

Hi Electrified Marine Enthusiasts! I have been following threads here for several years, and being an engineer, entrepreneur, and boater, I have long wanted to do some disrupting in this area. This project started for me with the development of a Li battery system intended as a generator replacement in boats that use a lot of energy for things like AC, refrigeration, stabilization, etc. Well it morphed into something very different as you can see in this video: https://youtu.be/T6xA_mODjR0 This might not be something for everyone here to relate to, but I promise products are in the pipeline that more will. Thanks for listening! Jamie

Greetings my fellow Electrosailors, the day has come after nearly a year of waiting for chips, motors, pumps, fans and now the final details need to be identified, she is getting repowered with Thunderstruck 18 KW kits. Facts and figures for SV/Retreat Time Catamaran LOA 44 ' Water line 40' Beam 20 Draft 3.5 Propeller 19 " Diameter 3 blade Pitch 19 degree Displacement 26,000 lbs. Battery bank per hull consists of 12 group 31 AGM Duracell 100AH Before I commit to keeping the 144-volt banks, I am asking the group to consider a few thoughts, Sacrificing a few amps by dividing each battery bank in half operating at 72 volts, this way I may be able to parallel them together for higher total amp hours? Or have two separate banks for redundancy charging would be done on 110 volts instead of 220 volts. Prop speed remains unknown to achieve at best half of hull speed, this is where I could use your help, without the variables of current and wind, I'm looking for a laboratory answer, this is to determine what gear reductions would best suit this vessels propulsion and efficiency. ? https://vicprop.com/displacement_size_new.php Any help or advice will greatly be appreciated as Thunderstruck is planning to program and tune and ship next week. Thanks John

Has anyone put solar panels on a Duffy electric boat? 48 Volt. 16 batteries. I have the boat. I have a Morningstar controller. Thanks for any insight ,ideas or warnings.

Hi folks I mostly lurk and learn. I think I may have asked this some time ago but wondering if there have been any developments. Is anyone 3d printing props with any success? I have a nav 3 which is propped out at about 9 knots . It is designed to push more weight and resistance than I am going to put it through so I would like to be able to put a more aggressive prop on it. Not looking for super speed just up into the low teens. Nick Sw Ontario Sent from my Bell Samsung device over Canada's largest network.