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 06-08-2012, 12:56 PM   #1
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,068
Question Just Want to Clarify House Battery Charge Issue

HELLO ALL!

I think I have a good handle on some house battery charging issues and cured some real problems. I'm a bit paranoid about my house batteries getting drained so forgive me if I am asking a really basic question.

I understand that my converter will charge the batteries on genny or shore power. If I am going down the road and have the genny fired up to run the air conditioner I will probably also run my refer on electric at the same time. I believe that in this configuration I will need to engage the AUX BATTERY switch which makes sense to me. The genny puts out 110 to the converter and the converter charges the house batteries.

During the times I am not needing to run the genny then I know I will need the refer to be on LP. I also know that the refer needs 12V service to run the control board.

So a couple questions:

1. Do I still need to activate the AUX BATTERY switch to get 12V to refer for for any other 12V circuits for that matter?

2. Does the chassis alternator also charge the house batteries so that running the AUX BATTERY switch (if needed) will not drain my house batteries?

STILL LEARNING
__________________

__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss 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 06-08-2012, 01:08 PM   #2
Senior Member
 
bluepill's Avatar
 
Join Date: Jan 2011
Location: Pensacola, FL
Posts: 2,246
Are you referring to the "Aux. Battery DISCONNECT" switch near the entry door?
__________________

__________________
2008 Itasca Meridian 37H & 2015 Flagstaff T12RBST
2011 & 2012 Len & Pat's "One lap of America"
27K miles & 41 states in 13 months - Woo Woo
Yellowstone Lake 6-1-2012
bluepill is offline   Reply With Quote
Old 06-08-2012, 01:11 PM   #3
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,068
Quote:
Originally Posted by bluepill View Post
Are you referring to the "Aux. Battery DISCONNECT" switch near the entry door?
Yes sir.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-08-2012, 01:28 PM   #4
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 14,970
De-activating the "Aux Battery " switch will cut power to all 12v circuits in the coach. So leave it on; or the Fridge won't operate on 110; shut down for storage is the only reason to turn "Aux batt " switch off.
I've run with gen set on for roof A/C operation on the highway and the convertor and alternator, don't seem to have any issues working together. Not sure if your coach would do the same, but I'm sure all manufacturers would forsee this and wire things up accordingly.
Driving the engine alternator should charge all batteries in the coach, if your coach batteries go down while driving, you may have a problem with the "Dual Battery Isolator" or whatever system in use in your coach.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 06-08-2012, 01:58 PM   #5
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,068
Quote:
Originally Posted by Skip426 View Post
De-activating the "Aux Battery " switch will cut power to all 12v circuits in the coach. So leave it on; or the Fridge won't operate on 110; shut down for storage is the only reason to turn "Aux batt " switch off.

...

Driving the engine alternator should charge all batteries in the coach, if your coach batteries go down while driving, you may have a problem with the "Dual Battery Isolator" or whatever system in use in your coach.
That is how I think I understood the use of the AUX BAT switch.

I'm just a tad concerned that my house batteries are a little smallish. I ran the rig on batteries for about 2 hours with no lights on, refer and HWH on LP and 2 Fantastics running. According to my EMS my batteries were down to 12.2V. I get a little squeamish when I get below 12.2V and perhaps that is a result of dead house batteries in the past that were later found to be caused by my converter. That problem has since been fixed and no problems since.

Without going to far off topic, how low of a voltage is it safe to let a house battery drop to before one must fire up genny/shore power to top them off again?

THANKS!
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-09-2012, 03:26 AM   #6
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
12.2 vdc is a commonly used standard of a lead acid battery state of charge to be at 50%. You don't want to go below this level for good battery maintenance.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 06-09-2012, 11:27 AM   #7
Senior Member
 
siggyd's Avatar
 
Freightliner Owners Club
Join Date: Aug 2005
Location: Chicagoland
Posts: 667
To be sure,I would clip on a Volt-meter to the RV batteries and then test with the Genny,Engine,Shore power, Aux switch On & OFF.
That will answer and confirm all your questions ,in case there is a problem
with some other failure.
Siggy D.
__________________
Siggy & Ursula.
2011 Newmar DSDP 4020 (no Tag, no DEF, 07 emission),
FTL XCR ,ISL 400,2015 Jeep Cherokee Limited, 4x4, V6, Active Drive II, BrakeBuddy
siggyd is offline   Reply With Quote
Old 06-09-2012, 12:32 PM   #8
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
Quote:
Originally Posted by athuddriver View Post
HELLO ALL!

I think I have a good handle on some house battery charging issues and cured some real problems. I'm a bit paranoid about my house batteries getting drained so forgive me if I am asking a really basic question.

I understand that my converter will charge the batteries on genny or shore power. If I am going down the road and have the genny fired up to run the air conditioner I will probably also run my refer on electric at the same time. I believe that in this configuration I will need to engage the AUX BATTERY switch which makes sense to me. The genny puts out 110 to the converter and the converter charges the house batteries.

During the times I am not needing to run the genny then I know I will need the refer to be on LP. I also know that the refer needs 12V service to run the control board.

So a couple questions:

1. Do I still need to activate the AUX BATTERY switch to get 12V to refer for for any other 12V circuits for that matter?

2. Does the chassis alternator also charge the house batteries so that running the AUX BATTERY switch (if needed) will not drain my house batteries?

STILL LEARNING
After reading all of the posts on this thread someone is really confused or Fleetwood does things A$$ backwards or they use weird nomenclature.

An AUX Battery Switch is not the same as a Battery Disonnect Switch. The battery disconnect switch is commonly called the "salesman switch" which is usually near the entry door and it disconnects 12 VDC to the interior of the coach. The AUX Battery Switch as I know how it is primarily used is to temporarily tie both battery banks together when one bank is low. Such as in this case, if the chassis battery was too low to start the engine, you hold the AUX Battery Switch until the engine starts.

I don't know how Fleetwood put together its charging system but I know Monaco did NOT install total charging systems on every coach that would allow both battery banks to be charged when using shore or genny power or when the engine alternator is running.

However, there are after-market devices that will work if the coach isn't already equipped. A good one is called Trik-l-Start that will keep the chassis battery charged while on shore or genny power.

Ultra TRIK-L-START Starting Battery Charger/Maintainer

My coach is equipped with a Lambert Battery Maintainer which will keep both battery banks charged when using any power supply.

Regarding how low you can let your house battery bank go down to, that number is between 11.9 - 12.0 VDC. That's when the AGS should kick in and charge your battery bank back up. The battery state for full charge is Float Status.

Here is a good article on 12 VDC batteries and maintenance.

The 12volt Side of Life (Part 1)

Dr4Film ----- Richard
__________________
Dr4Film is offline   Reply With Quote
Old 06-09-2012, 12:56 PM   #9
Senior Member
 
jauguston's Avatar
 
Join Date: Jul 2006
Location: Bellingham,WA
Posts: 973
12.2v is considered the 50% SOC for your flooded lead acid batteries BUT there are conditions that have to be met before the reading you get with a volt meter is anywhere near accurate. There has to have been NO LOAD of any kind on the battery bank for several hours and no charging done for the same length of time. Otherwise the voltage number you see is meaningless. The batteries need to be disconnected as there are usually phantom draws you don't even know about. Removing a cable from the pos battery post is the most sure way to know there is no draw on them. Its never easy (-:

Jim
__________________
2005 Sportscoach Elite 40' C-7 350 Cat w/MP-8
Suzuki Samurai toad w/VW 1.6 turbo diesel
800w solar system
jauguston is offline   Reply With Quote
Old 06-09-2012, 03:41 PM   #10
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,073
Since athuddriver has a Winnebago, I think he can safely ignore the remarks about Fleetwood electrical designs or what Monaco does or doesn't do. Winnie has their own way of doing things. And I doubt if athuddrive's Adventurer has an AGS to automatically kick the generator on.

The battery disconnect switch should be left on (batteries online) all the time except when the coach is being stored for several or more days without being plugged to shore power. It should also remain on while driving, since the engine alternator will be charging both house (Aux) and chassis batteries.

It appears your batteries are draining rather quickly. That suggests either a large power draw even when you think there is "nothing on" or batteries that are in poor condition. I would suggest a battery load test at a local auto parts shop to rule out bad batteries. The test is usually free.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 06-09-2012, 04:20 PM   #11
Senior Member
 
ChasA's Avatar
 
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
What Gary said is right. I think of it this way: If the switch is off, the batteries are disconnected and cannot be charged from any source. You can still have 12 vdc power from the converter if you have shore/gen power-- even if the switch is off. So if you want your house batteries to be charged the switch must be on. Hope I haven't added to the confusion.
__________________
2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
ChasA is offline   Reply With Quote
Old 06-10-2012, 02:23 AM   #12
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,792
I see nobody answered the second question you ask.

Both answers are the same: YES.

Aux battery is another name for the HOUSE battery, power to interior lights, fridge, water heater control, water pump and a host of other things.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 06-10-2012, 03:17 AM   #13
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
Not all coach builders will run the refrigerator circuit through the house battery disconnect.
This allows you to be able to turn on the refrigerator for an upcoming trip and still have most everything else turned off.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 06-15-2012, 10:31 PM   #14
Junior Member
 
Ottav's Avatar
 
Join Date: Mar 2012
Location: Sonoma
Posts: 12
Newbie here..
So if you turn off the aux battery switch located near the entrance and are plugged into
shore, will the interior lights light..

Bob
__________________

__________________
Ottav 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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:05 AM.


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