DiskDoctr
PA
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Joined: 05/29/2006
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"True Deep Cycle" according to local battery dealer. Here's the specs:
Deka DC31DT Marine Deep Cycle Battery (Lead Acid) 12V, 650 CCA
Quote:
Our batteries from DEKA are made with the highest quality parts and are guaranteed to be compatible with your original vehicle equipment. Built with advanced technology to insure the highest quality standards for reliability, durability and performance.
Increased Service Life
Protection against acid leakage and corrosion
Impact resistant case and cover
Optimum performance in extreme weather conditions
OEM battery compatible
Made in the U.S.A by East Penn Manufacturing
Extra cranking power
225min @ 23Amp, 185@25
I bolded the section to ask about.
IF it is true deep cycle, permitting repeated 50% discharge without harm, then two of these would be 440ah vs two GC2 at 205ah.
I *think* this is the model. It matches the verbal info I got from the dealer. I've bought Group 31 batteries from them many times in the past for diesel equipment. But not sure about his deep cycle batteries.
What do you think, what am I missing? ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/huh.gif "huh")
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Colo Native
Colorado
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Joined: 10/28/2013
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According to the DATA Sheet
http://www.eastpennmanufacturing.com/wp-content/uploads/Marine-Master-Spec-Sheet-0194.pdf
It's 105 amp hr for 20 so it would only be 210 with 2 Batteries.
2015 Winnebago Forza 34T
pushed by a 2011 Fusion Hybrid or 2020 Escape Hybrid
Retired DFD
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GordonThree
Northern Michigan
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Joined: 05/19/2013
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225 minutes at 23 amp hour draw, so about 100 ah per battery, or 50 ah usable.
I bought four of those from Sam's Club branded as Duracell. Great batteries in my opinion, no complaints here.
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed
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SoundGuy
S Ontario
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Joined: 02/11/2015
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DiskDoctr wrote:... what am I missing?
The 20 HR rate - 105 AH for one, 210 AH for two in parallel. The DC31DT is the battery I'll most likely replace my current 9 yr old Interstate G27 with. Here in Canada these Dekas are supplied by East Penn and sold at RV Care dealerships as Traveler's Choice branded batteries. ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/smile.gif "smile")
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DiskDoctr
PA
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Joined: 05/29/2006
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I'm missing the 105ah/battery part? Unless it is due to 50% usable?
The spec I was quoted is 220ah @23amps, which matches what I saw in the specs when I did a search.
IF they are true deep cycle and allow repeated 50% discharge, we would likely start with TWO batteries and add another battery if needed.
I like the idea of being able to add any number of batteries- if all else is close to equal- and more so if the 12v is better ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/wink.gif "wink")
The price I'm quoted is $120/ea.
The Crown GC-2 is also $120/ea at this dealer.
I can drive an hour plus and get Interstate GC2 at Sams Club for $86/ea.
I'd really HATE to get them and find out they don't hold up to the repeated 50% discharge cycles and sometimes heavy inverter draws ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/doh.gif "doh")
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SoundGuy
S Ontario
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Joined: 02/11/2015
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DiskDoctr wrote:I'm missing the 105ah/battery part? Unless it is due to 50% usable?
The spec I was quoted is 220ah @23amps, which matches what I saw in the specs when I did a search.
OK, one more time - when comparing one deep cycle battery to another you want to be comparing them at the 20 Hr rate. That DC31DT you're referring to is 20 Hr rated @ 105 AH, two would offer 210 AH, so obviously a pair wired in parallel drawn down to 50% SOC would offer you ~ 105 usable AHs. As far as heavy inverter draw is concerned 12 volt jugs will inherently suffer less voltage drop under heavy load than a pair of similarly rated 6 volts in series simply because internal resistance will be lower.
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DiskDoctr
PA
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Joined: 05/29/2006
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Colo Native wrote:According to the DATA Sheet
http://www.eastpennmanufacturing.com/wp-content/uploads/Marine-Master-Spec-Sheet-0194.pdf
It's 105 amp hr for 20 so it would only be 210 with 2 Batteries.
I was looking at 225 MINS @ 23 amps, not the 105 @ 20hr cap
Please explain this to me, I am reading it wrong? (I'm not a battery expert)
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KD4UPL
Swoope, VA
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Joined: 03/16/2008
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Your last post match your first. Your first post, highlighted in bold, says 225 min @ 23 amps. Your second post you claim you were verbal quoted 220 Ah at 23 amps.
These are two entirely different things.I can assure you that no group 31 12v battery is going to be much above 120 Ah. There's no way that one of these is 220 Ah. Both together would be.
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DiskDoctr
PA
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Joined: 05/29/2006
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SoundGuy wrote:OK, one more time - when comparing one deep cycle battery to another you want to be comparing them at the 20 Hr rate. That DC31DT you're referring to is 20 Hr rated @ 105 AH, two would offer 210 AH, so obviously a pair wired in parallel drawn down to 50% SOC would offer you ~ 105 usable AHs. As far as heavy inverter draw is concerned 12 volt jugs will inherently suffer less voltage drop under heavy load than a pair of similarly rated 6 volts in series simply because internal resistance will be lower.
Okay, I just asked that part...again. But you answered in between my posts. LOL.
Thanks!
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KD4UPL
Swoope, VA
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Your last post match your first. Your first post, highlighted in bold, says 225 min @ 23 amps. Your second post you claim you were verbal quoted 220 Ah at 23 amps.
These are two entirely different things.I can assure you that no group 31 12v battery is going to be much above 120 Ah. There's no way that one of these is 220 Ah. Both together would be.
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