Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 02-15-2015, 07:55 PM   #15
Senior Member
 
rssnape's Avatar
 
Join Date: Oct 2011
Posts: 330
So I installed two buss bars, a 200 amp fuse, and a battery disconnect. I installed 3 group 31 batteries to replace the 4 old batteries. Although I couldn't fit 4 of the 31's in I gained about 80 amp/hrs over the 27's.
Got the batteries wired correctly for even charge and discharge, as well as easy access to the caps for watering.

Pictures are before and afterClick image for larger version

Name:	ImageUploadedByiRV2 - RV Forum1424051596.154666.jpg
Views:	130
Size:	100.7 KB
ID:	86197Click image for larger version

Name:	ImageUploadedByiRV2 - RV Forum1424051620.739486.jpg
Views:	139
Size:	100.2 KB
ID:	86198


1997 Tiffen Allegro Bus 37', Cat 3126
__________________

__________________
rssnape is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 02-16-2015, 03:45 PM   #16
Junior Member
 
Join Date: Nov 2014
Posts: 8
Where did you get your bus bars? They look like maybe Blue Sea.
__________________

__________________
Thor Man is offline   Reply With Quote
Old 02-17-2015, 01:30 AM   #17
Senior Member
 
chboone's Avatar


 
National RV Owners Club
Ford Super Duty Owner
Join Date: Sep 2010
Location: Horse Town USA, CA.
Posts: 2,933
Now all you need to keep the batteries full is a Flowrite Battery Watering System. I have it on my coach and chassis batteries, very simple to keep batteries topped off. The link is a double set for 12V, you will need a single set and the hand pump.

Flow-Rite MP-2000 12V Double Battery Watering System
__________________
1999 35 ft. Dolphin 5350,F53 Chassis Chassis build date 1/99, Banks System, 5 Stars Tune, Air Lift Air Bags front & rear, Koni Shocks,Blue OX TruCenter,TigerTrak track bars front & rear, Roadmaster 1-3/4" rear auxiliary sway bar,2004 F450 Lariat 6.0 Diesel Crew Cab DRW with B & W Custom Truck Bed, 1994 36 ft. Avion 5th Wheel
chboone is offline   Reply With Quote
Old 02-18-2015, 12:18 PM   #18
Senior Member
 
rssnape's Avatar
 
Join Date: Oct 2011
Posts: 330
Quote:
Originally Posted by Thor Man View Post
Where did you get your bus bars? They look like maybe Blue Sea.

Buss bars are Marinco. As is fuse and disconnect.


1997 Tiffen Allegro Bus 37', Cat 3126
__________________
rssnape is offline   Reply With Quote
Old 02-19-2015, 08:52 AM   #19
Junior Member
 
Join Date: Aug 2014
Posts: 25
Far better to have two 6V batteries connected in series. When you connect batteries in parallel, as they age, one begins to hold less charge than the other and you get a current flow between the two as the better battery discharges into the weaker one. This means the charger will be continually having to try to keep the two charged. This will boil water out much faster.
__________________
garymunson is offline   Reply With Quote
Old 02-19-2015, 09:26 AM   #20
Senior Member
 
Join Date: Jul 2014
Posts: 9,909
Some information about parallel batteries, from Yandina.com


Q Can I parallel different size batteries within one bank? A Although the standard recommendations are not to mix old and new, good and bad, big and small, etc., you should understand the reasons and make up your own mind.


The truth is that you can parallel just about anything. The downside is, if they are not matched, one battery (the newer) will tend to carry most of the load and the total capacity will be slightly less than the sum of the individual capacities. The one with the lower internal impedance will tend to take more of the load. If your new battery has a capacity of 100AH and the old one still had 45AH, then in parallel you will get something less than 145AH, but it will help and it will work.

When the old one eventually DIES, it will drag the new one down but this happens whenever two batteries are in parallel and one dies, the only difference here is it is going to happen sooner than it would had they both been brand new. So big deal, you gained some residual use out of the old one and the new one will not be permanently damaged - just charge it up again.
The bottom line is the batteries in parallel provide more power - never less - than either one on its own - it just may not be the "ideal" way to do it.


Q Won't the smaller battery get overcharged if put in parallel with a large one?

A The whole process of charging batteries in parallel is naturally self regulating, naturally governed by terminal voltage and current flowing through the internal equivalent resistances. For simplification, each battery can be considered as a perfect battery that holds the charge combined with a series resistor representing the internal resistance, and a parallel resistance representing the self-discharge leakage current.

Lets say you have a charging source dumping out say 100 amps. If you have 4 batteries in parallel sharing this source the distribution of the charge current is governed by those internal voltages and internal resistances. From Ohm's law, the charging current that flows into each battery is the voltage divided by the resistance. In this case the voltage is the charging voltage arriving at the terminals minus the actual internal voltage divided by the series resistance of the battery. A discharged battery is going to put a larger voltage differential over the internal resistance so more current will flow to it. A charged battery is going to put less voltage drop across the internal resistance so it will take less or none of the available charging current. A large plate battery which has a correspondingly lower internal resistance will demand more current because of this lower resistance. A small motorbike battery in parallel will have a high internal resistance and demand very little current.
All these demands for current result in a common voltage on the parallel circuit which is what the alternator or charger sees.

None of the batteries will ever be "overcharged" as a result because the charging voltage is controlled. Even the smallest battery will only be seeing the same voltage so it is like the other batteries are not there. If you suddenly removed all the big ones and left just the tiny bike battery on the 100 amp alternator, the voltage would immediately rise because the amps trying to flow into the tiny battery have to pass through its internal resistance which is high. But instead of the voltage or current going to an excessively high value, the regulator in the alternator cuts the current back to a level that limits charging to a safe level.

Good infomation
__________________
twinboat is online now   Reply With Quote
Old 02-19-2015, 10:21 AM   #21
Senior Member
 
Join Date: Feb 2010
Posts: 4,493
Yes you can mix battery types as long as tech is same as voltage.

It is best for matching units though.

12v floaded with (2x6 floaded) okay but 12v floaded with 12v agm no.

The charging system expects one good battery. (6 in parallel is one battery....look it up)

However if one cell SHORTS then it pulls all of them down and the charger gets a little funny too.

If doing series (2x6) then it takes out the other one.

So for repair for short term in a multiple battery plant remove the bad one until the rest can be evaluated and if they are all good replace bad one with exact same.

Best to replace all but may not be needed.
__________________
Tony & Lori
1989 Country Coach Savannah SE
TQ60 is offline   Reply With Quote
Old 02-19-2015, 11:42 AM   #22
Senior Member
 
rssnape's Avatar
 
Join Date: Oct 2011
Posts: 330
Quote:
Originally Posted by garymunson View Post
Far better to have two 6V batteries connected in series. When you connect batteries in parallel, as they age, one begins to hold less charge than the other and you get a current flow between the two as the better battery discharges into the weaker one. This means the charger will be continually having to try to keep the two charged. This will boil water out much faster.

I wanted 6v batteries, but all of them that I looked at with a desirable capacity were taller than my in floor battery bay would allow. So I was stuck with the 12v.


1997 Tiffen Allegro Bus 37', Cat 3126
__________________
rssnape is offline   Reply With Quote
Old 02-19-2015, 01:13 PM   #23
Senior Member
 
cbilodeau's Avatar
 
Join Date: Jan 2015
Location: Montreal
Posts: 957
Quote:
Originally Posted by rssnape View Post
I have a battery bank with 4 12v flooded batteries. They are charged with a 3 stage charger. I have already scolded myself for being in attentive. I checked one battery and there was adequate fluid. I was in a hurry and didn't check the others.
I finally checked all 4. 2 were severely low on water, the other 2 were fine. What causes this situation? Why are they not all low on water?
Thanks
Battery Killer ��


1997 Tiffen Allegro Bus 37', Cat 3126
I had the same problem on my Pace Arrow Vision 1999 F53. My 3 stage charger was not in fact a 3 stage charger. It is a Progressive Dynamics PD9100 charger (Inteli power PD9155). I had to purchase the PD9105 Charge Wizard (30$) to make it a 3 stage charger. It connects above the fuses.

Now my batteries never needs water.
__________________
cbilodeau is offline   Reply With Quote
Old 02-20-2015, 12:38 PM   #24
Senior Member
 
rssnape's Avatar
 
Join Date: Oct 2011
Posts: 330
Well the engine batteries were 7 yrs old and giving a few headaches so I replaced them as well along with 4 new terminals to insure excellent connections.
Click image for larger version

Name:	ImageUploadedByiRV2 - RV Forum1424457107.658496.jpg
Views:	44
Size:	104.1 KB
ID:	86565


1997 Tiffen Allegro Bus 37', Cat 3126
__________________

__________________
rssnape is offline   Reply With Quote
Reply

Tags
battery



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
Battery Question phyllisNchri 5th Wheel Discussion 11 11-12-2014 06:04 PM
Battery Charging Question atamians Travel Trailer Discussion 12 05-03-2014 10:16 PM
Generator starting battery question Jasper7821 RV Systems & Appliances 26 01-30-2014 01:11 PM
Battery Question spinn Newmar Owner's Forum 10 01-24-2014 05:48 PM
Question about battery bank system and length of wire to purchase Jasper7821 RV Systems & Appliances 9 01-24-2014 03:48 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:36 AM.


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