GordonThree
Northern Michigan
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Joined: 05/19/2013
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the 2x GC2 for $170 aren't AGM for that price, or yes, they're a good deal. I paid 179 ea for my G31AGM from sams, where are you seeing them for 120 ea?
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed
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MrWizard
Traveling
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Joined: 06/27/2004
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That battery is approx 80 amp hrs
The first number 225*23 gives 86 amp hrs
The second number 185*25 gives 77 amp hrs per battery
Less then 200 amp hrs per pair
Quite a bit less than two golf car batteries at 220~230 amp hrs
I can explain it to you.
But I Can Not understand it for you !
....
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1997 F53 Bounder 36s
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DiskDoctr
PA
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Joined: 05/29/2006
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KD4UPL wrote: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.
Yeah ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/doh.gif "doh")
I was expecting to hear Ah, didn't realize a rating ALSO had a minutes at amp rating. *I* mixed those up apparently.
Thanks guys for setting me straight.
So is it correct that these 31's would together have the SAME approx ah as a pair of GC-2's? What about performance, since they wouldn't have the same voltage drop as Soundguy said?
If so, a pair of 31's would be $240, a pair of GC-2 at Sams Club would be $170. Crudd, thought I was onto something ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/frown.gif "frown")
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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! ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/smile.gif "smile")
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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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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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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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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
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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.
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