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Open Roads Forum  >  Tech Issues

 > Single AGM or 2 GC2???????

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HTElectrical

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Posted: 10/11/17 07:17am Link  |  Quote  |  Print  |  Notify Moderator

Dusty R wrote:

red31 wrote:

is a single 12v flooded out of the running? about 1/2 the price of 2xGC2.


It appears that you are not running on battery very much you don't need much storage. So why have 2 batteries?

Dusty

I have to have 2 if they a 6v.
The only reason I was thinking AGM is because I was trying to be lazy. Dohhhhh!!!
I might just go for a marine 12v cheapo.


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marcsbigfoot20b27

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Posted: 10/11/17 07:55am Link  |  Quote  |  Print  |  Notify Moderator

HTElectrical wrote:

I thought I would get a couple opinions on which way I should go for my Battery replacement strategy this time.
A little background:
I just replaced my converter with a Progressive Dynamics Inteli-Power Converter 9200-14.8 Volt Deck Mount.
I had a pair of Costco GC2 Battts that were put into service on 2/2013, but were abused by my crappy WFCO converter. When I boondock, I always run my Honda 2000 (with 5 gal. external tank) basically 24/7 while I'm at the Dunes, and if not out in the sand I have power available at my covered parking. Trailer is always in the higher temps of west coast (Las Vegas, Desert)
Just recently one of my GC2s developed a shorted cell, so I need to either replace those with new 6V, or possibly with a single 12v AGM. Since I never really run my inverter or 12v for any length of time without plugging in what would be the the most economical, trouble free, dependable way to go?


Thanks in advance!!!!!!!


Costco GC2 batts are $86.00ea so a pair would be about $187.00.



According to many, having one bad GC2 in a pair is nearly impossible. [emoticon]
I would go 12 volt flooded on the cheap or 12 volt AGM if you have a few bucks.

2oldman

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Posted: 10/11/17 08:37am Link  |  Quote  |  Print  |  Notify Moderator

HTElectrical wrote:

what would be the the most economical, trouble free, dependable way to go?
You don't get all those in one purchase. AGMs are about as trouble-free as it gets, but they aren't considered "economical" if that means the cheapest.
marcsbigfoot20b27 wrote:

According to many, having one bad GC2 in a pair is nearly impossible. [emoticon]
It is if you take care of them properly, and don't try to get 15 years out of them. A 12v battery can suffer damage just as easily. I guess the eye roll indicates sarcasm.

time2roll

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Posted: 10/11/17 08:50am Link  |  Quote  |  Print  |  Notify Moderator

Replace the pair of GC2 with same.


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Matt_Colie

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Posted: 10/11/17 09:37am Link  |  Quote  |  Print  |  Notify Moderator

I am glad to see that you already replaced the WFCO. That was a good start.

Before the depression, we had a business converting retired keel sloops to performance cruisers. That means adding the creature comforts like an effective house electrical system. I like AGMs a lot, but there is a simple issue. GC2s from Sams/Costco ~180$. AGM GC2s best price ~700$. For many owners that was a simple decision.

I can tell you that the AGMs will last longer. Will they last three times longer? Not likely, but they will need no maintenance until they need to be replaced.

If you really don't need the house bank for much, just put a cheap 12V jar in there and replace it when it gets bad. Don't spend extra for a Marine multi purpose as they are not worth the extra. You will have a very hard time finding a true deep cycle 12V as there is no demand.

I can't tell you what will work best for you, but my coach has a pair of GC2s that are starting to loose capacity and they are eight years old.

Matt


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A sailor, his bride and their black dogs going to see some dry places that have Geocaches in a coach made the year we married.


HTElectrical

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Posted: 10/11/17 09:52am Link  |  Quote  |  Print  |  Notify Moderator

Matt_Colie
I could of gotten another year or 2 out of the pair of GCs, but I let the water get too low and exposed the top of the plates not 1 time, but twice.
What I started doing when I had it at home, was using a timer and only charging it for 15 to 30 min. a day. There is no reason to constantly leave it plugged in especially if you don't have any parasitic loads.

time2roll

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Posted: 10/11/17 09:58am Link  |  Quote  |  Print  |  Notify Moderator

Did the WFCO ever go to 13.2 volts? Because 13.6 in NV could still use a bit of water in the Summer.

PD at 13.2 volts will use less water and more likely is better plugged in.

2oldman

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Posted: 10/11/17 09:58am Link  |  Quote  |  Print  |  Notify Moderator

Matt_Colie wrote:

AGM GC2s best price ~700$. For many owners that was a simple decision
Huh? You can get 2 6v AGM gc2's for less than that. Much less.

ScottG

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Posted: 10/11/17 10:03am Link  |  Quote  |  Print  |  Notify Moderator

For your application I would get one Wet Cell 12V battery. Yo have no need for anything fancier and it would be a waste of money.


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HTElectrical

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Posted: 10/11/17 10:15am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Did the WFCO ever go to 13.2 volts? Because 13.6 in NV could still use a bit of water in the Summer.

PD at 13.2 volts will use less water and more likely is better plugged in.


It pretty much stayed at 13.2 to 13.4. Never more and sometimes less. Piece of SH!T for sure.

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