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**Adelie** · 27-02-2021, 06:06

Quote:

Originally Posted by Iains boatyard

Quote “.Until I can afford a good lithium pack, about the time they are a mature technology.”
Unbelievable comment, sorry but the technology is matured Do some research.
I use Lithiums have done for 3 boats in the last 10 years when comments were the boat will blow up catch fire etc ��*♂️ Please if you have not researched and used Lithium do not make unfounded comments.

Maybe Capn-Bill has researched and come to an educated opinion.
You didn’t ask you just stated his opinion was unfounded.
Sounds like your opinion of his opinion of his opinion is unfounded.

hzcruiser · 27-02-2021, 07:23

Quote:

Originally Posted by Iains boatyard

Quote “.Until I can afford a good lithium pack, about the time they are a mature technology.”
Unbelievable comment, sorry but the technology is matured Do some research.
I use Lithiums have done for 3 boats in the last 10 years when comments were the boat will blow up catch fire etc ��*♂️ Please if you have not researched and used Lithium do not make unfounded comments.

Well put... we're in a transitioning state. LFP's are "the future" for the time being, until there is a better option. AGM were the future back in the days...

mitiempo · 27-02-2021, 22:41

Quote:

Originally Posted by hzcruiser

AGM were the future back in the days...

So said the marketing department.

hzcruiser · 28-02-2021, 02:08

Quote:

Originally Posted by mitiempo

So said the marketing department.

...and a lot of happy users.

Of all those people that "try" LFPs, very very few go back to FLA.

sailorboy1 · 28-02-2021, 04:24

every problem on a boat can be fixed with the application of enough cash

gonesail · 28-02-2021, 04:31

Quote:

Originally Posted by Iains boatyard

Quote “.Until I can afford a good lithium pack, about the time they are a mature technology.”
Unbelievable comment, sorry but the technology is matured Do some research.

maybe what he meant was when the prices for this technology come down .. which they will

**Dockhead** · 28-02-2021, 04:46

Quote:

Originally Posted by mitiempo

With a watering system you could have used T105's in your previous boat as well.

https://www.trojanbattery.com/produc...tering-system/

There are others as well.

Theoretically. But you should have seen the battery space in that boat! I would do AGM's again.

We actually had pretty good luck with AGMs. Trojan 8D's, which lasted us longer than batteries have lasted in my present boat. I think we got 8 years out of the first set, and 10 years out of the second, and this was decades ago so we didn't have a really good battery charger or know as much as we know now about how to take care of batteries. Last boat was much less power intensive though so I guess we cycled a lot less power through the batts.

**Dockhead** · 28-02-2021, 04:47

Quote:

Originally Posted by sailorboy1

Which was 1 of the 2 i listed. Everything else is marketing hype

I wasn't disagreeing with you.

**Dockhead** · 28-02-2021, 04:48

Quote:

Originally Posted by Simi 60

Yep, I have enough shyte going on aboard without having to add watering the batteries to the list.

Now, where's those olives for the martinis. (-;

Indeed. Let's get our priorities straight!

I prefer a twist, however.

**Dockhead** · 28-02-2021, 04:57

Quote:

Originally Posted by Iains boatyard

Quote “.Until I can afford a good lithium pack, about the time they are a mature technology.”
Unbelievable comment, sorry but the technology is matured Do some research.
I use Lithiums have done for 3 boats in the last 10 years when comments were the boat will blow up catch fire etc ��*♂️ Please if you have not researched and used Lithium do not make unfounded comments.

Well, it may be considered mature or not depending on your point of view.

I think it's certainly matured from the point of view of cost, reliability, etc. LiFePo is definitely far cheaper than any lead batteries per amount of power cycled, so long as you're not using drop in substitutes -- so long as your system is designed specifically for LiFePo cells and all you do is replaced the cells. We had a big discussion about this in another thread with detailed analysis.

But it's NOT matured in the sense that it's not something that you can just buy and drop in and expect it to work out of the box, at least not in an optimal way and not for a reasonable cost.

So there's the rub -- you have be a pretty knowledgeable and talented do-it-yourselfer, OR you have to hire a good electrician, to modify a boat built for lead acid batteries, to get the best out of lithium, and if you don't do it yourself, it is hard to justify the cost.

I was all set to do lithium in my boat last year, and had even designed the system. I would have been absolutely realistic and the cost of the components and cells was not bad, less than 3x the cost of replacing all the existing lead batteries even considering all the modifications to the system which would have served future lithium cells as well as the first set.

In the event I had so much other work to do on the boat preparing for a long distance race that I changed my mind and did a minor modification (with the generous help of a couple of friends) to the battery boxes and cabling to allow me to use T105's instead of the Group 27 batts I had been using previously.

It's a sub-optimal battery bank compared to lithium, which is so much superior in operation. But it gets the job done, and it saved me a lot of time and work. The work would have been pleasant and interesting but I was just too busy.

David Ess · 01-03-2021, 15:09

Im pretty sure I've heard guys say they love them because they cant afford lithium ones.

Simi 60 · 01-03-2021, 16:10

Quote:

Originally Posted by David Ess

Im pretty sure I've heard guys say they love them because they cant afford lithium ones.

But at least they have a boat which is more than can be said for you

mvweebles · 01-03-2021, 16:13

Quote:

Originally Posted by David Ess

Im pretty sure I've heard guys say they love them because they cant afford lithium ones.

Citation please. I went with lithium but there are some legitimate use cases where Firefly do better. So curious where you get this from.

What kind of boat do you have and what batteries do you have aboard?

Peter