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zigzagrv

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Posted: 01/11/19 07:49am Link  |  Quote  |  Print  |  Notify Moderator

I used the 27DC for many years, but had to replace them every 2-3 years. During the second or third year, they would not last the night running my furnace. Have switched to two 6v GC-2s from Sam's Club and am very pleased with them. On my fourth year and still going strong.


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starcraft69

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Posted: 01/11/19 09:25am Link  |  Quote  |  Print  |  Notify Moderator

Just a quick reminder if you RV Park camp it really doesn't matter what battery. If you dry camp then it will matter. I see so many people waste money on expensive batteries and all they do is use full hook-ups.


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Posted: 01/11/19 09:33am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

If it says MARINE it is not DEEP CYCLE.. if it says GC it is (GC-2)

Trolling batteries may also be DEEP CYCLE. But I've never seen them in the store.


They are deep-cycle batteries by definition. There is nothing magical about a golf car battery and nothing distinguishes them from a marine deep-cycle in construction or chemistry.


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Blazing Zippers

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Posted: 01/11/19 10:08am Link  |  Quote  |  Print  |  Notify Moderator

Half our over night stops might be dry camping, but now that we're more retired, travel is going to increase. Thusly, I looking for more storage.
The two batteries currently in use are mistakenly deep cycle starting batteries. I would just like to add to this arrangement. I have the room for two more batteries and as much as I'd like 6 volt batteries, I'd probably have to change all the set up. I can handle the added weight, but would like to keep it down if possible.
Thanks to all who responded. Maybe I'll have to head over to WM and git batteries--but Pep Boys will be on the way.

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Posted: 01/11/19 10:28am Link  |  Quote  |  Print  |  Notify Moderator

Keeping weight down, is direct opposite to adding capacity
The more lead in the battery the more weight the more capacity
You are going to add two batteries, adding two batteries that weight 70# each, makes more sense than two batteries that Weight 55# each
Get the two heaviest deep cycle that will fit, in your space available
The AGMs in my previous RV
Weighed 102# each, 135 ampHrs each
The 4D battery I installed in this RV weighs 145# 198 ampHrs

A 55# battery rated at 90 ampHrs is less durable than a 70# battery rated at 100 ampHrs

The amount of lead per rated ampHr means a lot

Example most GC weigh in around 62# and 212 ampHrs at 6v, thick plates
That's 124# for 212 ampHrs at 12v

* This post was edited 01/11/19 10:40am by MrWizard *


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theoldwizard1

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Posted: 01/11/19 10:50am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

If it says MARINE it is not DEEP CYCLE.. if it says GC it is (GC-2).

Concur !

GC (Golf Cart) batteries are designed for one purpose, providing power over a long period of time, to a greater DOD, and survive multiple discharge/charge cycles.

While not a perfect apples-to-apples comparison, the EverStart 27DC weighs about 50 lbs. A Trojan T-1275 (size GC-12) is a smidgen bigger but it weights 85 lbs. That extra weight is extra lead, which is GOOD !

IMHO, any battery that advertises a CCA or MCA is NOT a true deep discharge battery.

I happened to have had an email conversation with Trojan about this topic (The T-1275 is a true deep discharge 12V "golf cart" battery; The SCS225 is more of a "dual purpose" battery, one of the the few that Trojan actually lists "Cold Cranking Amps" for.)

James M. Cobb Technical Support Engineer Trojan Battery Company wrote:

The T-1275 is a higher capacity battery, rated at 150 Ah where the SCS225 is rated at 130 Ah. The T-1275 is a heavy duty 12V golf cart battery with thicker plates, which means it has a longer cycle life at 50% DOD, 1200 cycles versus 600 cycles for the SCS225.


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Posted: 01/11/19 10:59am Link  |  Quote  |  Print  |  Notify Moderator

zigzagrv wrote:

I used the 27DC for many years, but had to replace them every 2-3 years. During the second or third year, they would not last the night running my furnace. Have switched to two 6v GC-2s from Sam's Club and am very pleased with them. On my fourth year and still going strong.


Apples to oranges comparison - a pair of 6v GC-2s in series offer more capacity than a pair of Group 27 12v batts. A fairer comparison would be to a pair of Group 31s.


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Posted: 01/11/19 11:03am Link  |  Quote  |  Print  |  Notify Moderator

Mine lasted just over a year. Will buy a different brand before spring

theoldwizard1

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Posted: 01/11/19 11:05am Link  |  Quote  |  Print  |  Notify Moderator

jkwilson wrote:

wa8yxm wrote:

If it says MARINE it is not DEEP CYCLE.. if it says GC it is (GC-2)

Trolling batteries may also be DEEP CYCLE. But I've never seen them in the store.


They are deep-cycle batteries by definition. There is nothing magical about a golf car battery and nothing distinguishes them from a marine deep-cycle in construction or chemistry.

Not true !

Yes, the chemistry is the same, but there are differences in construction. True deep cycle batteries have thicker plates (one reason they weight more per cubic inch than dual purpose batteries) and the have more room at the bottom of the case.

Read this link The difference between starting and deep discharge batteriesx

theoldwizard1

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Posted: 01/11/19 12:19pm Link  |  Quote  |  Print  |  Notify Moderator

mobeewan wrote:

Per my conversation with one of the technical people at Johnson controls who make the EverStart batteries for Walmart ...

I don't know how recent your conversation was, but I found this on the Internet.

Jason Johnson wrote:

Jason Johnson, Automotive Service Advisor (2016-present)
Answered Sep 6, 2018
Most EverStart batteries are made by Exide with a few made by Delphi.

Johnson Control does not make batteries for Wal-Mart nor do they any longer make Interstate (now made by Exide.)

Common JCI battery brands are Optima and Duralast. New Duralast batteries come off of the same line as the old Interstate batteries with the same guts and warranty.


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