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Showing results 1 to 25 of 35
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Jatar
Forum:
Multihull Sailboats
24-05-2019, 10:01
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I'm not sure what ancillary equipment you are referring to, though. Here is what is included in their battery (quoting from their site):
"Including battery management system with integrated...
Forum:
Multihull Sailboats
24-05-2019, 09:57
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Sorry, I appreciate your comments and views.
Forum:
Multihull Sailboats
24-05-2019, 09:20
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I think you missed my point. I have not decided to use them. I just wanted to understand your comment about them being OK to use as a propulsion bank, but not as a House bank.
Forum:
Multihull Sailboats
24-05-2019, 08:20
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Yet that doesn't explain why you would accept them as a propulsion bank. It sounds more like you would recommend against them altogether.
Forum:
Multihull Sailboats
23-05-2019, 10:30
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Yes, I am also considering these. I need to learn more about the safety side, and the price is fairly steep. However, the weight aspect is very attractive, coming in well below all the other...
Forum:
Multihull Sailboats
19-05-2019, 15:47
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I'll document the whole thing on video and post it when the time comes. Thank you for offering your suggestions, nothing is yet written in stone, I'm just weighing possibilities up until I buy. ...
Forum:
Multihull Sailboats
19-05-2019, 13:45
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Well, not quite. Full max output on my cat means I need 30kw, not 15kw (2 SD15 servoprop motors, 15kw each).
However, yes, I can get along on 15kw, for a cruising speed of about 6 knots.
...
Forum:
Multihull Sailboats
19-05-2019, 13:24
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
What does "the o Crap" mean?
Forum:
Multihull Sailboats
19-05-2019, 11:16
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I originally considered that (and haven't ruled it out) but I like the idea of running only one generator and having it supply enough power to drive both motors at around 6 knots, with some power...
Forum:
Multihull Sailboats
19-05-2019, 10:07
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I am already familiar with Polarpower, however, the two I'm interested in are these:
https://polarpower.com/products/dc-generators/8340p-40415/...
Forum:
Multihull Sailboats
19-05-2019, 09:11
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Those are too small. I'm likely going with a 20kw and a 10kw, though there are some arguments to go with just one 20kw, but I like redundancy.
Forum:
Multihull Sailboats
19-05-2019, 08:44
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
A: I agree, sounds like fun. :)
Forum:
Multihull Sailboats
17-05-2019, 07:30
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I plan on two, a 20kw and a 10kw, this gives me options (see below). However, I doubt I will choose to charge at 1C the vast majority of the time, it's too hard on the batteries. Most of the time I...
Forum:
Multihull Sailboats
16-05-2019, 10:19
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I will discuss any batteries I might be looking at with Oceanvolt, prior to making a choice. However, I already know I won't be building a DIY bank.
Forum:
Multihull Sailboats
15-05-2019, 14:33
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
My main problem with Super-B batteries is the price. They are something like $3,300 per battery. I am seeking a bank size of somewhere around 800Ah@48v. That requires 20 Super-B batteries. 20x...
Forum:
Multihull Sailboats
15-05-2019, 12:59
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Yes, the boat is being modified to handle the space needed for that much solar. 400A is what I expect, though your estimates aren't exactly what I've gotten from other people using solar. One rule...
Forum:
Multihull Sailboats
15-05-2019, 12:35
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
You keep talking about this, but I don't know of any system I could buy.
Please link an electric sail drive, which weigh under 150 lbs., each, and a battery bank at 480v, which weighs under 800...
Forum:
Multihull Sailboats
15-05-2019, 12:32
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Sorry, meant 600A. I'm planning an 800Ah battery bank, hopefully with a 2C discharge rate, and even then, the motors only use 600A, max. I don't plan to discharge at max rate for more than bursts,...
Forum:
Multihull Sailboats
15-05-2019, 09:17
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
This is actually why I started this thread in the first place. Oceanvolt SD 15 motors pull over 300 Ah at full speed, and I will have two. Therefore, I need my batteries to be able to discharge at...
Forum:
Multihull Sailboats
14-05-2019, 12:41
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Also, I should mention, I'm not looking for a DIY setup, I want a complete battery system, something like this:
Green Orca 1050
• 505 x 540 x 325 mm (H x D x W)
• Lloyd’s certified
• 52 Volt,...
Forum:
Multihull Sailboats
14-05-2019, 12:15
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I'm not planning on the SuperBs if I can help it. Those are just one of the batteries Oceanvolt recommends for their SD 15s. I'm currently looking for a better option. As I mentioned, I'm looking...
Forum:
Multihull Sailboats
08-05-2019, 13:44
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I agree that I would not risk a DIY scrapped EV pack battery bank, but I might consider these professionally made marine batteries, based on the previous applications using Li-NMC, including...
Forum:
Multihull Sailboats
08-05-2019, 13:36
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
I'm not sure I'm using it correctly, but it is a battery term.
Just search the net on 'e-rate battery' and you'll find plenty of references. Most likely, I should just stick to C-rate to avoid...
Forum:
Multihull Sailboats
08-05-2019, 11:38
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
To answer your questions, yes, this will be on mid-size cat 48', with two generators, possibly a 20kw and a 10kw. 5kw of solar panels. I haven't decided if I'm going with a single or separate...
Forum:
Multihull Sailboats
07-05-2019, 11:15
Replies:
119
Lithium battery C-rate question
Views:
11,820
Posted By
Jatar
Re: Lithium battery C-rate question
Just another way of expressing the charge rate of a battery. Most people just use C-rate for both charge and discharge, but I was using E-rate for charge and C-rate for discharge to makes things...
Showing results 1 to 25 of 35
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