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11-28-2016, 02:06 AM
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#1
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Member
Join Date: Mar 2016
Location: Just right of the big pond on the left...
Posts: 76
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Battery connection: Auto posts vs L-blade?
About to buy a Lifeline 8D and there are two options, see links below...
GPL-8DL (L-blade)
GPL-8DA (Auto post)
Which is the better route? More common? Which should I buy and why?
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11-28-2016, 07:04 AM
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#2
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Senior Member
Join Date: Jul 2013
Location: So Cal
Posts: 4,071
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For House batteries? Whichever makes you happy.....or whichever is cheaper.
I imagine the auto posts will heat less even with way more amps flowing, but that's not something that matters with a house battery.
For house batteries, when I run my microwave (largest current draw) I'm pulling about 100A out of the battery. For comparison, when you start the van you could be pulling 400-500A out of a battery when cranking the starter, especially when cold.
Modern starter batteries commonly also have side mount terminals...these are smaller cross-section than old-fashioned posts and still handle starting currents quite well.
The L-post blades accept ring lug type battery cables; ring lugs are easily crimped to cables to make custom lengths, at least easily at an auto parts place with a crimper. I bought long cables for my house batteries on ebay and again, ring lugs are easy to find as terminations for custom lengths.
I'd go with the L-bracket blade type unless the other style was on sale/cheaper, etc.
Are you buying an 8D because you have a battery holder set up for that size? Where are you located?
__________________
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2003 Honda Element
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11-28-2016, 08:14 AM
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#3
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Senior Member
Join Date: Apr 2013
Location: San Francisco, CA
Posts: 3,283
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He is in Tahoe area and is often in SF Bay Area.
Question: where is this 8D going to mount? Might be better to go with two 6V Golf Cart AGM's or a single 4D?
__________________
Ray
Beastie 3: 2002 7.3 EB Cargo: Agile TTB, CCV High Top, Custom Walk Through, Lots of stuff added. www.BlingMyRig.com
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11-28-2016, 11:07 AM
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#4
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Senior Member
Join Date: Aug 2016
Location: Reno, NV
Posts: 1,420
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I think he needs some deer whistles first! ( I joke, but that was a bummer. I was extra vigilant driving up past Bishop last week on the way to Mammoth)
I am going with L-Blade so I can bolt those lugs down nice and tight.
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11-28-2016, 11:36 AM
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#5
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Member
Join Date: Mar 2016
Location: Just right of the big pond on the left...
Posts: 76
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Haaa, thanks Flux : D
This will be house battery only. The plan now to get me up and running is to mount it behind the driver seat. Then as I get things figured out it may move elsewhere as needed.
I like the capacity of the 8D vs the 4D and the difference is size is negligible I feel. Two 6V offer more options for configuration but slightly less capacity if I went with the Lifeline GPL-4CT.
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11-28-2016, 01:29 PM
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#6
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Senior Member
Join Date: Jul 2013
Location: So Cal
Posts: 4,071
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Quote:
Originally Posted by J.Spicoli
I like the capacity of the 8D vs the 4D and the difference is size is negligible I feel. Two 6V offer more options for configuration but slightly less capacity if I went with the Lifeline GPL-4CT.
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If you don't need an auto group size and can possibly get batteries from San Diego to Tahoe consider the Lucent-Alcatel AGM blems from 619battery.com
175AH each; $125/each....a little smaller than a 4D....1der and I (and a few others) have 350AH for $250.....that's 71 cents an amp-hour!!
__________________
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2003 Honda Element
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11-28-2016, 02:24 PM
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#7
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Member
Join Date: Mar 2016
Location: Just right of the big pond on the left...
Posts: 76
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I'm not stuck on a particular size, just want capacity.
I didn't see Lucent-Alcatel AGM you mentioned listed on that site.
On a side note, will the safe discharge be the same between the 6V vs the 12V? I think you shouldn't go below 50% for the 12V if memory serves, is that the case for the 6V variety as well?
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11-28-2016, 09:25 PM
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#8
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Senior Member
Join Date: Jul 2013
Location: So Cal
Posts: 4,071
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Quote:
Originally Posted by J.Spicoli
I'm not stuck on a particular size, just want capacity.
I didn't see Lucent-Alcatel AGM you mentioned listed on that site.
On a side note, will the safe discharge be the same between the 6V vs the 12V? I think you shouldn't go below 50% for the 12V if memory serves, is that the case for the 6V variety as well?
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Call them...ask Jeff about the lucent alcatels......I have his phone number sharpied on my batteries if you can't find a phone number.
yes 50% max discharge on any if you want reasonable life. The deeper the discharge rate, the shorter the life...less cycles.
There is a failure mode difference between a pair of 6 volt batteries in series and a pair of 12V batteries in parallel......if you lose one 6V battery you have no usable capacity.....with a pair of 12V batteries you still have the second battery....assuming the dead one didn't take out the good one with it.
__________________
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2003 Honda Element
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11-29-2016, 10:38 PM
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#9
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Member
Join Date: Mar 2012
Location: Santa Monica, CA
Posts: 32
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is the 8D a direct bolt in for the 4D...assuming a "standard" 2005 EB50 build? the dimensions are a bit different accd to lifeline website, 10.89" on 8D vrs 8.7" on 4D for the width, height and length look the same.
seems a wider mount bracket would be required.
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