Re: [Amel Yacht Owners] Strange Battery charging…


Alexandre Uster von Baar
 

Hello Kent,

Compare to the news you had this is nothing…

After the 3 days power outage in Puerto Rico, I had a good idea the batteries needed to be changed, was just not enough margin for shipping.
Yes we have the same battery compartment (8 +1).

I am interested in the Trojan 27TMH rated at 115 AH (20-hour)
I doubt I will find them locally in Tortola, so will have them shipped.

I should probably rename this thread: would appreciate some input.

Let’s take 2 batteries: the Deka (Group 31) DC32DT rated 105 AH and the Trojan (Group 27) 27 TMH rated at 115 AH - actually in my example I should pick the Trojan TMX (Group 27) also rated 105 AH like the Deka.

Is there a difference? Will the group 31 for any reason last longer or perform better?
I was always told the heavier was the better the Deka weight 60 lbs and the Trojan 55 lbs so I could understand the Deka having an advantage, but in that case back to the Trojan (Group 27) 27 TMH which has more AH: 115 and also weight more: 61 lbs.
I am missing something in my analogy?

Back to your question Kent, I wouldn’t mind going with AGM batteries, but as it was mentioned many times on the forum, the 24 volt alternator on the engine is set for flooded type batteries, and I doubt they are adjustable. Please tell me if I am wrong!

For now I am staying at anchor, but something else I have been thinking is instead to try to increase the AH, try to decrease the consumption.
One way is to have the freezer insulation improved, like using an R50 or something more efficient than what we have.

Thanks in advance for feedback on the battery difference question.

Sincerely, Alexandre
SM2K #289 NIKIMAT
Harbor View Marina, Tortola, BVI




--------------------------------------------

On Fri, 12/2/16, Kent Robertson karkauai@yahoo.com [amelyachtowners] <amelyachtowners@yahoogroups.com> wrote:

Subject: Re: [Amel Yacht Owners] Strange Battery charging…
To: amelyachtowners@yahoogroups.com
Date: Friday, December 2, 2016, 1:03 PM


 









Hi Alex.  Sorry about the bad news.
 What batteries are you going to buy?Kristy is
SM243 and has the smaller battery compartment with room for
9-Group27 batteries.  These typically are 90 AH batteries
(which I think yours are) so an 8 battery house bank would
yield 360 Ah at 24V.Do you have the larger size
compartment that allows for 2 more batteries?
I would like to increase my total
AmpHour capacity, And stay with flooded lead acid
batteries.
I know
others have used 6-V batteries and other solutions to this
problem, but don't know if they have the larger battery
compartment, whether they are using gel or AGM batteries, or
how they arrange them in the battery
compartment.  I see Bebe's pics show 4
thinner batteries along the inboard side of the compartment.
 Bill, what size batteries are you using, and are the
charging characteristics the same for both sizes?  Any
issues with charging two different size batteries?  Do you
have the larger sized compartment?
Anyone else with a different
solution to increasing the amphours in the smaller battery
compartment?  Can you post some specs and pics of the
batteries and how you arranged them?
Thanks in
advance.KentSM243KristyCurrently
Shelter Bay near Colon, Panama






















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