12v vs 6v - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-22-2017, 10:46 AM   #1
Junior Member
 
Name: Steve
Trailer: 1979 Boler1700
British Columbia
Posts: 21
12v vs 6v

What is the advantage if any of 2 6volt batteries over 2 12volt batteries? One would be hooked up in series and the other in parallel, but other than that what are the advantages of one or the other?
__________________

__________________
ststefan is offline   Reply With Quote
Old 08-22-2017, 11:34 AM   #2
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,193
Registry
Quote:
Originally Posted by ststefan View Post
What is the advantage if any of 2 6volt batteries over 2 12volt batteries? One would be hooked up in series and the other in parallel, but other than that what are the advantages of one or the other?
2 12 Volt in parallel increase the available current/time by sum of rating on the two batteries.
2 6 volt in series you have the current/time rating of the lowest of the two batteries.
__________________

__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 08-22-2017, 11:41 AM   #3
Member
 
Name: Jack
Trailer: 2015 Casita 17FD
Rapides Parish La.
Posts: 80
12v hooked in parallel must be bought at same time and be as "twin" as possible...if one goes bad, both will have to be replaced...WHY. ..because the stronger of the two will be in constant discharge into the weaker battery...PRO...if one goes bad, you will still have one to power your 12v systems and you can possibly get a set up with more amphours for your usage.........

Two 6v in series do not have the discharge problem, so, you don't have to be as concerned about twinning as with the 12s...if one goes bad, you will be stuck without 12v power.....

IMO, if you can afford the cost, weight, real estate and the twinning problems, two 12s are a better setup for heavy duty boony camping..if you will have power available on occasion, whether it be solar, gennie, campground or ???, a single 150ah 12v Trogan batt maybe a better choice......

You never actually stated your intended camping style...being specific will get more specific answers............

madjack
__________________
madjack is offline   Reply With Quote
Old 08-22-2017, 12:14 PM   #4
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,193
Registry
Quote:
Originally Posted by madjack View Post
12v hooked in parallel must be bought at same time and be as "twin" as possible...if one goes bad, both will have to be replaced...WHY. ..because the stronger of the two will be in constant discharge into the weaker battery...PRO...if one goes bad, you will still have one to power your 12v systems and you can possibly get a set up with more amphours for your usage.........

Two 6v in series do not have the discharge problem, so, you don't have to be as concerned about twinning as with the 12s...if one goes bad, you will be stuck without 12v power.....

IMO, if you can afford the cost, weight, real estate and the twinning problems, two 12s are a better setup for heavy duty boony camping..if you will have power available on occasion, whether it be solar, gennie, campground or ???, a single 150ah 12v Trogan batt maybe a better choice......

You never actually stated your intended camping style...being specific will get more specific answers............

madjack

The idea of batteries being "twins" is a myth. Even if one is smaller you'll still have the combination of the two Ah of usage available.

Many if not most people have a maximum of 2 weeks in the summer and a couple week-ends of camping. Some have a week-end every other year or less. Having large amounts of battery power just doesn't make sense to me.

We spend 90 to 100 days without hookups in the winter. We manage with a single "Marine" battery 74amph and a 65watt solar panel that's hidden away most of the time. I take it out and charge the battery every 3 or 4 day.

It can be done easily without huge expenses. I spent a whole lot less than the Honda generator set.
__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 08-22-2017, 01:39 PM   #5
Senior Member
 
Name: Joe
Trailer: 1999 Casita 17' SD
Ohio
Posts: 506
Quote:
Originally Posted by Byron Kinnaman View Post
The idea of batteries being "twins" is a myth.
Maybe not.
Do a google search and you'll find the thinking is 50/50 and some that say it's not necessary throw in something like "it's so small it's not a problem".

They also add that when home seperate them and charge them seperatly.

But if you can find someone that owned a 1980's Oldsmobile diesel powered car ask them about it as they had two 12 volt batteries in parallel.
The common senarro was they replaced the bad battery and shortly the new battery was bad too.
They don't have to be twins but the weaker lesser voltage one will eventually take down the higher voltage stronger one.
__________________
Joe Romas is offline   Reply With Quote
Old 08-22-2017, 01:47 PM   #6
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,193
Registry
Quote:
Originally Posted by Joe Romas View Post
Maybe not.
Do a google search and you'll find the thinking is 50/50 and some that say it's not necessary throw in something like "it's so small it's not a problem".

They also add that when home seperate them and charge them seperatly.

But if you can find someone that owned a 1980's Oldsmobile diesel powered car ask them about it as they had two 12 volt batteries in parallel.
The common senarro was they replaced the bad battery and shortly the new battery was bad too.
They don't have to be twins but the weaker lesser voltage one will eventually take down the higher voltage stronger one.

I know you read it on the internet so must be true.
__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 08-22-2017, 01:47 PM   #7
Junior Member
 
Name: Steve
Trailer: 1979 Boler1700
British Columbia
Posts: 21
Thanks all. Most of my camping would be boondocking. I am thinking of getting a 90 watt solar panel. I am new to rv-ing and would like to gather as much info as possible. If my current battery and 90 watt solar is good enough I will stay with it. Otherwise I think I would go with the 2 12 volt batteries for the added benefit of still having 12 volts if one battery dies.
__________________
ststefan is offline   Reply With Quote
Old 08-22-2017, 02:01 PM   #8
Senior Member
 
Byron Kinnaman's Avatar
 
Name: Byron
Trailer: 2006 Scamp 13' towed with a 2005 Dodge Dakota 4.7l Magnum W/full tow package (over kill)
Oregon
Posts: 6,193
Registry
Quote:
Originally Posted by ststefan View Post
Thanks all. Most of my camping would be boondocking. I am thinking of getting a 90 watt solar panel. I am new to rv-ing and would like to gather as much info as possible. If my current battery and 90 watt solar is good enough I will stay with it. Otherwise I think I would go with the 2 12 volt batteries for the added benefit of still having 12 volts if one battery dies.
How long do you plan on camping at one time?
__________________
Byron & Anne enjoying the everyday Saturday thing.
Byron Kinnaman is offline   Reply With Quote
Old 08-22-2017, 02:03 PM   #9
Junior Member
 
Name: Steve
Trailer: 1979 Boler1700
British Columbia
Posts: 21
Probably 4 to 5 days at a time
__________________
ststefan is offline   Reply With Quote
Old 08-22-2017, 02:54 PM   #10
Member
 
Name: Perry
Trailer: Bigfoot 25RQ
Lanesboro, Minnesota, between Whalan and Fountain
Posts: 77
After this decision is made, the next question you need to ask/argue/answer is:
Flooded or AGM?

Enjoy,

Perry
__________________
2003 Bigfoot 25B25RQ - 2015 Ford F-150, 3.5 V6 Ecoboost

Previous Eggs - 2001 Scamp 16' Side Bath, 2007 Casita 17' Spirit basic, no bath, water or tanks, that we regret selling
Perryb67 is offline   Reply With Quote
Old 08-22-2017, 02:58 PM   #11
Senior Member
 
Name: Joe
Trailer: 1999 Casita 17' SD
Ohio
Posts: 506
Quote:
Originally Posted by Byron Kinnaman View Post
I know you read it on the internet so must be true.
No that's a real myth

Sparky, what if a cell in one 12 volt battery shorted out, that can and does happen.
Then you would have a ten volt battery discharging a 12 volt battery

Go to a library and find some good textbooks an the subject.
__________________
Joe Romas is offline   Reply With Quote
Old 08-22-2017, 03:14 PM   #12
Senior Member
 
Name: Francois
Trailer: Bigfoot
British Columbia
Posts: 889
Registry
batteries die ????

like they have a heart attack and...poooof...they're gone???

there can be a WHOLE LOT of factors that would influence one's decision of wether to go with two 12s or two 6s.....but the idea that one battery will suddenly DIE right at dinnertime and you will be marooned with NO power sounds a little funny to me.....

IME, other than a dead short and a battery exploding.....batteries die a really slow death....as in, you will notice that your batteries don't quite last as long as you sort of remember....a few outings like that and you will go to the trouble of testing your batteries at home and discover that, indeed, one of them is "dying" the slow death...(and if you had that exploding battery syndrome happen, having 12 volt power or not one night will be small on your preocupations list)

space, weight, your power consumption and how much solar recovery you can expect from your panel(s) are real considerations and worth investigating.....especially in a "smallish" trailer (add weight distribution to your planning)

the internet is flooded (pardon the pun) with opinions on the old "6 vs 12" issue.... while some opinions appear to be more credible than others there are plenty on both sides.....so the issue is really if one is better FOR YOU....(like you would probably not remove the back seat of your car to put in a 45 gal gas tank back there...even though it would mean longer range and savings given you'd only fill up where gas was cheaper)

on the solar panel front.... I like having X number of watts mounted flat on the roof....and half that amount of watts in a deployable panel stored inside trailer with extension cord... for a whole bunch or reasons

happy trails
__________________
Franswa is offline   Reply With Quote
Old 08-22-2017, 04:02 PM   #13
Member
 
Name: Jack
Trailer: 2015 Casita 17FD
Rapides Parish La.
Posts: 80
...twinning...remember, it only applies to batteries connected in parallel...I have experienced this with those old Olds (Dad had two of those clunkers) and with 18 wheelers...a bad battery will draw the other(s) down...no doubt about it...just think about it...much as using a power bank to charge a cell phone or even a jump box on a car, when connected, they will charge up the down batt by drawing the "good" source down to where they are (or near abouts)........
...as to batts suddenly dieing...have you never had a vehicle, giving no indication of a problem and you go out and it is dead, whether it is sitting overnight in your driveway or in a store parking lot, even for a short stop..all I can say is I would love to live that charmed a life.......
...as in all things related to life, YMMV.............
madjack
__________________
madjack is offline   Reply With Quote
Old 08-22-2017, 09:25 PM   #14
Senior Member
 
Mike Magee's Avatar
 
Name: Michael
Trailer: Li'l Hauley
Oklahoma
Posts: 5,060
Quote:
Originally Posted by Byron Kinnaman View Post
I know you read it on the internet so must be true.
I read Byron's comment on the internet....
__________________

__________________
How much time do we have left? 2 Chr. 7:14
Mike Magee is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Run 12V TV/monitor off of 12V outlet or via inverter? Rod Scher Problem Solving | Owners Helping Owners 22 11-19-2016 01:11 PM
12v vs 110v power - what goes where in Scamp? TomN Care and Feeding of Molded Fiberglass Trailers 20 11-26-2005 10:51 AM
12V Coffee Pots Legacy Posts Problem Solving | Owners Helping Owners 17 06-15-2003 08:33 PM
12V Coolers Legacy Posts Problem Solving | Owners Helping Owners 1 06-14-2003 07:54 PM
Adding a 12v feed Legacy Posts Modifications, Alterations and Updates 6 06-09-2003 02:13 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:51 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.