โNov-10-2016 10:29 AM
โNov-15-2016 05:14 AM
landyacht318 wrote:
I'd not buy an AGM battery reading 12.3v. There is no Bargain there.
If these AGMS are going to be deeply cycled and not 100% recharged nearly every cycle, they will not be the best AGM for the application.
They are said to be, on some marine forums, very poor at PSOC cycling, partial state of charge cycling, losing capacity quickly and being very difficult to recover compared to other higher quality, higher$$ AGMS like Lifeline, Northstar and Odyssey.
The Member CMS in the following link, is well respected on every forum on which he participates, as he is a fountain of knowledge and experience and also writes clearly and concisely.
Look at post 49, where he speaks of the Deka AGM G-31 or the EP G-31.
EP meaning East Penn who make Deka intimidator.
http://www.trawlerforum.com/forums/s3/carbon-foam-batteries-1-year-later-26233-3.html
He says Deka themselves rate the their AGM at ONLY 350 cycles to 50% depth of discharge, less than half of Northstar or Odyssey and about 1/3 that of Lifeline.
If true, that bargain just got expensive.
Unless you can't recharge the batteries properly anyway, then just get the cheapest you can find and ring the 'works just fine' bell as long as you can.
โNov-14-2016 07:50 PM
โNov-14-2016 04:11 PM
howardq99 wrote:howardq99 wrote:
Now looking at other options, it seems that Deka batteries are highly recommended. I was hoping for input on Deka Intimidator AGM batteries and if the intimidator series are the ones that are highly recommended. I'm specifically looking at their group 31 12V battery with part number 8A31DTM.
Thanks!
Things just got a little more interesting....
I called the local distributor to confirm they had the 8A31DTM in stock before I make the drive tomorrow to pick up 4 of them for ~$236 + tax each. They mentioned they had some cosmetically blemished Intimidator stock they would sell at a greatly discounted cost of $75 each plus tax.
The catch is that it is not the 8A31DTMs but rather their 9A31P part number (I think this falls under their "starting & cycling" category). As far as I can tell they are 4.5lbs lighter and 100AH vs 105AH.
I was told they only have the automotive SAE posts (this is what scares me). I asked them to measure the voltage and I was told that they are at 12.30V. The blemished also only have a 30 day warranty.
What would you do, stick to the original plan of purchasing 4 of the 8A31DTMs or get 8 of the 9A31Ps and save ~$350 to boot?
(If I get 8 batteries I will not have to schlep them between my house and trailer, I'll keep 4 at the house and 4 in the trailer)
Many thanks to the experts for their sage advice!
โNov-14-2016 03:58 PM
โNov-14-2016 03:50 PM
howardq99 wrote:
Now looking at other options, it seems that Deka batteries are highly recommended. I was hoping for input on Deka Intimidator AGM batteries and if the intimidator series are the ones that are highly recommended. I'm specifically looking at their group 31 12V battery with part number 8A31DTM.
Thanks!
โNov-13-2016 01:29 PM
howardq99 wrote:
So to properly fuse this configuration using MRBF fuses, would you need 1 fuse for each of the positive terminals or only 1 fuse on the positive terminal closest to the Load & Charge?
โNov-13-2016 11:37 AM
pianotuna wrote:
Hi Chris,
3 12 volt jars can only be wired in a balanced manner using method #3 at the smartgauge site.
This is what is balanced and best for twin twelve volt batteries.
โNov-12-2016 09:42 PM
โNov-12-2016 07:39 PM
howardq99 wrote:
I was going to purchase some Fullriver DC250-6 AGMs for my project but I've been told that every DC250-6 battery in the US was purchased for a large order being shipped overseas and it will be at least until mid-December until they are available again.
Now looking at other options, it seems that Deka batteries are highly recommended. I was hoping for input on Deka Intimidator AGM batteries and if the intimidator series are the ones that are highly recommended. I'm specifically looking at their group 31 12V battery with part number 8A31DTM.
I know that the Fullriver are 6V (with two in series giving 250AH) and the Deka are 12V (with 2 in parallel giving 210AH).
One item that I would like advice on is that with the Dekas, I would need to wire the four batteries in parallel to work with my Xantrex ProWatt 2000 12V inverter until next fall when I'll be upgrading to a 24V inverter. At that time I would series-parallel the batteries.
Any input will be appreciated.
Thanks!
โNov-12-2016 07:06 PM
BFL13 wrote:mvas wrote:
Two wire segments carry 2/3 of the amps = higher voltage drop
Two wire segments carry 1/3 of the amps = lower voltage drop.
Since the amperage is not shared equally the system is not balanced.
The wire segments carrying 2/3 of amps, must be "doubled up" for balance
You never said if that was amongst the load/charging wires or just amongst the battery bank wiring.
โNov-12-2016 02:44 PM
โNov-12-2016 09:03 AM
โNov-12-2016 08:04 AM
โNov-12-2016 08:01 AM
pianotuna wrote:
Chris,
I'd love to know how you found room for 9 jars. I had 7 in two banks with balanced wiring.