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Just a quick update. After 3 months everything is working great. The 10Kw motor pushes the boat along fine with great torque right from the get go unlike a diesel or gas engine where you have to build up the rpm's to get into the good part of the torque curve. The 202Ah LiFePo4 battery is...

I launched on May 5th with just 4 79Ah group 24 AGM batteries in series to provide 48 V. I already had three that were new last year so rather then delay my launch waiting for the 3.2V cells to arrive from China I bought the 4th battery. I waited to long to order my 3.2 cells from china. I was...

I converted my 30' 10,000 lb sailboat to electric 2 years ago and am thrilled with the results. I have a 10KW motor with 202Ah of LiFePO4 batteries. It will push the boat to 6.2kts (hull speed is 6.4) but thats using about 200 amps which means that I have only 1hr before I'm out of battery...

Here is the latest update on my conversion. The motor is installed. I had to extend the stringers and shorten the prop shaft but all of that went well. I changed my plans on 12V power I already had three 12V 79Ah group 24 AGM batteries so I bought a new 12V 79Ah group 24 AGM and wired them in...

"Having a 10kw motor means you're looking at a ~208 amp draw at 48 volts (10kw/48v = 208a). With that, you'd draw down a 200Ah 48V battery in about 45 minutes of operation, or about 65 minutes for the 280Ah pack. As a sailor, that feels really limiting in the case where you need to get yourself...

Here is my first attempt at the electrical system. I would be replacing the two battery bank with one 48V battery made with 16 3.2 V 200 or 280 Ah cells.

My final calculations showed that I was about 225 pounds lighter with the electric motor, batteries, panels, etc. She sits up about an inch higher in the stern because of this. I have been planning to put maybe 150lbs of lead in the bottom of the bilge but just never got to it. The weight in the...

Bubba thanks for the thumbs up. As far as regeneration I do get it in spurts but it is not enough to offset the amps needed to keep the contractor closed. I have a 2 bladed prop maybe with a 3 bladed prop it would work but I think that you really need a bigger boat with higher hull speed but...

Another update after 1 1/2 years everything is working great. I did add the second solar array of 4 60W panels so I now have 520W. I have taken the LiFePO4 batteries down to 20%DOD and everything works great. The Daley BMS is still working fine after 82 hours on the motor clock and many...

thanks tom

Hi All, I'm new to the forum. Have been reading many of the threads on here to educate myself and looking for any guidance. So here is my story. I'm converting my 1979 Cape Dory 30 sailboat from a 14 hp diesel to a 10Kw 48V electric motor (the motor is ordered). I was planning on just using 8...

Checkout electricyacht.com for marine test electric propulsion systems

It's all about setting up our boats for how and where we use them. What is right for one person may be wrong for another. I sail primarily in Nantucket sound where there is always wind. The most common forecast in the summer is 10-15 gusting 20 or 25. In the spring and fall it's more like...

Yes, it helps. I have not ordered yet but I could not find in Daly literature that the lug came with it.

I know of three people that added the diesel or gas generators, two of them have never used it and the other used it once.

Thank you I'll look into them

I have been there for several years. My diesel was sill running very well with the exception that I was starting to get raw water into the oil last summer. I eliminated all of the simple root causes and finally determined that the water jacket must have finally started to rust through. So I...

Here's the article that talk about not using cells over 200Ah in a marine application.Lithium battery systems | Nordkyn Design Caution it is a lot of information but very informative.

I tried that at first but I was worried that the two terminal (+ & -) going to the BMS were to close together. I'll see how close they are in actuality when the batteries arrive. I also thought that I could do it this way and put an insulator between them, maybe a piece of G-10 or FR-4.

OK now I'm confused. In your earlier post you said "One thing we see done quite often on such propulsion conversions is using a BMS that is not common port (uses FET for the power disconnect) design." In this quote you say that a not common port uses FET's. Then above you are saying that a...

I believe that the solar panel manufacturer used 5.5 hr per day to come up with the average Ah per day per panel. Yes, I agree on the three panel array (array 2) only being a at 63V is problematic. The solar panel manufacturer is looking to see if they can up the voltage on each panel. If they...

Here is a basic wiring diagram. Probably not enough detail. Please let me know and I'll get more from the supplier.

I considered using my existing transmission and V-drive but they are 41 years old as well and would need at a minimum freshening up and maximum a total rebuild. Freshening up would be hundreds of dollars and rebuild thousands. A new 16 HP diesel which would require a new tramsmission and V-drive...

Thanks for the quick response. I have a 48V 16S 3.2V 202Ah pack not a 12V. Is the Batrium, REC still the answer?

Not to worry. I was referring to the common port BMS diagram (see below) and simply mis-stated. I meant to say to bolt the two P- together and bring it out to where the P+ is shown in the top right corner of the diagram. The P+ and P- essentially become the battery + and -. If you bought a...

I have a new question. In several videos that I have watched lately I noticed that they are using a two pole breaker (one pole positive and the other pole negative) between the solar panels and the controller. I currently just have a single pole breaker on the positive wire. Should I be concerned?

Here's how I plan to configure my 48V 200Ah pack and BMS. The dimensions do not include the battery pack enclosure.

Fantastic, thanks for the help

J, Any info on the BMS that I should use on my application?

My whole system (10Kw motor, controller, throttle, monitor, 2/1 reduction drive, mounting hardware and custom shaft/flange) was $4995.