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 > 12v to 6v review?

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Vintage465

Prunedale CA.

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Posted: 05/04/21 05:09pm Link  |  Quote  |  Print  |  Notify Moderator

ktmrfs wrote:

JimK-NY wrote:

Vintage465 wrote:




Yup that is true you would have only 235ah in a two 6-sixer set up. But you'd only have 200ah in two-12er set up and they both have the same "safe draw down to 50%". The weight is about the same, the sixers being about 2 pounds heavier. The 12's will take up more space as their foot print is a little larger.
......


I found 2 batteries that compared closely for AH ratings. The first was a 6 v Duracell @235/2=117 and the second was an Apex 12 v with 115 AH. Two of each would be comparable. The weight for each was identical @ 68#. The 6 v took 794 cu in of space and the 12 v tool less at 729 cu in. The biggest difference is in height of the batteries. Typically 6 volt batteries are higher, in this case by almost 3". My battery box will not accommodate the extra height so for me there is no choice but to stick with a pair of 12v batteries. At least I found a pair totally 300 AH that will just fit.


the height increase with GC2 is an issue with a fair number of applications. And couple that with few vented boxes for GC2 use in 5th wheels.

However for tongue storage there are many nice boxes made for two GC2's either end to end or side to side configuration if you have enough clearance to get to batteries in. But that assumes the TT battery location on the tongue has enough height, and on many new trailers that can be an issue.


In my case,(and everyone's situation is different)the height is not nearly as much an issue as is the foot print. It would be nearly impossible to get the amount amp/hour with 12v batteries and get them where my 6's are.


V-465
2013 GMC 2500HD Duramax Denali. 2015 CreekSide 20fq w/450 watts solar and 465 amp/hour of batteries. Retiring in 2021, then look-out road, here we come!

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 05/04/21 07:06pm Link  |  Quote  |  Print  |  Notify Moderator

If automotive batteries were sufficient, golf cars, electric forklifts and submarines would have been powered by car batteries.

I'll repeat it. A group 27 battery was fitted with GC220 plates. It had 220 CCA and died from acid starvation. Designer: Me. Vendor ABC BATTERY Los Angeles.

wopachop

Who run bartertown

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Posted: 05/06/21 08:38am Link  |  Quote  |  Print  |  Notify Moderator

SabreCanuck wrote:

Currently have 2-12v 7ear old batteries that appear to be getting weak. Am thinking of replacing with 2-6v GC batteries (or maybe 4).
Anyone have experience or real world review of moving to the 6’s?
Where do you camp? I didnt read the 4 pages sorry if answered.

mr_andyj

Georgia

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Posted: 05/07/21 08:19am Link  |  Quote  |  Print  |  Notify Moderator

MEXICOWANDERER wrote:

If automotive batteries were sufficient, golf cars, electric forklifts and submarines would have been powered by car batteries.

I'll repeat it. A group 27 battery was fitted with GC220 plates. It had 220 CCA and died from acid starvation. Designer: Me. Vendor ABC BATTERY Los Angeles.

and remember when it's too hot to park in the sun, roof top solar panels are useless.

Ummm, umm, I'll repeat, ummm.. You lost me there. Too hot? I don't think so, solar works in the sun. And, the battery "you" designed failed? That tells me more than I need to know...

Boon Docker

Mountain Foothills of Southern Alberta

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Posted: 05/07/21 02:57pm Link  |  Quote  |  Print  |  Notify Moderator

mr_andyj wrote:

MEXICOWANDERER wrote:

If automotive batteries were sufficient, golf cars, electric forklifts and submarines would have been powered by car batteries.

I'll repeat it. A group 27 battery was fitted with GC220 plates. It had 220 CCA and died from acid starvation. Designer: Me. Vendor ABC BATTERY Los Angeles.

and remember when it's too hot to park in the sun, roof top solar panels are useless.

Ummm, umm, I'll repeat, ummm.. You lost me there. Too hot? I don't think so, solar works in the sun. And, the battery "you" designed failed? That tells me more than I need to know...


Let me help you out here.

Quote: "when it's too hot to park in the sun, roof top solar panels are useless"

[emoticon]

JimK-NY

NY

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Posted: 05/07/21 04:00pm Link  |  Quote  |  Print  |  Notify Moderator

When it is too hot to park in the sun, then it is time to move on.

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 05/07/21 04:18pm Link  |  Quote  |  Print  |  Notify Moderator

OK I'll lower the bridge to fit the ship...

When it's too hot to park in the sun, it means for you. The panels can care less. Of course someone *could* insist on 135 degrees inside just because the batteries wouldn't charge if he didn't. This is referred to as prettyfartsmeller planning.

There is zero comparison between golf car battery construction and automotive battery with rope handles and weird terminals construction. I attempted to describe exactly why this is true. But once again the bridge seemingly was too high for the boat? Pull all the books on celestial mechanics and phasor algebra off the shelf?

I am a Battery Council International certified design engineer the last I checked. That should satisfy any "you designed" questions. Membership in the BCI is expensive. So I let it lapse. It wasn't paying me a nickel.

One member posted there was "no proof" that there was a difference between golf car and automotive battery lifespan. There is a pregnant pause after that statement.

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