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09-09-2012, 09:47 AM
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#1
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Junior Member
Join Date: Aug 2009
Posts: 29
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battery voltage
I recharged my two 6 volt batteries on the bench with a trickle charger. My volt meter read 13.24 after the charge, but kept dropping every couple hours. 24 hrs later it was down to 12.66. Is this normal or are they in need of replacement?
They are 3 yrs old and I thought well maintained.
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Ron
09 Tacoma ext-cab (v6, 4wd,auto)
Escape 17B
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09-09-2012, 11:30 AM
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#2
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Senior Member
Join Date: Jun 2010
Location: Central, Pennsylvania
Trailer: Escape#5 2022 E19
Posts: 26,268
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Re: battery voltage
I recall 12.6 is 100% fully charged, anything over that means it has not fully rested, like in the 13's- here is a handy chart to refer to at bottom of page-
http://www.marxrv.com/12volt/12volt.htm
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Jim
Sometime life gets in the way of living.......
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09-09-2012, 11:58 AM
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#3
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Junior Member
Join Date: Aug 2009
Posts: 29
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Re: battery voltage
Thanks for the link to the article. I'll go back and read it in more detail.
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Ron
09 Tacoma ext-cab (v6, 4wd,auto)
Escape 17B
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09-24-2012, 07:08 PM
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#4
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Senior Member
Join Date: Sep 2012
Location: Ottawa, Ontario
Trailer: 2013 Escape 19
Posts: 743
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Re: battery voltage
I'm new to the RVing world, so I'm trying to absorb as much information from these forums as I can find...
I'm reading through "The 12 volt Side of Life" linked to by Jim, above. It talks about how standard converters don't make good chargers, and that you should use a 3-stage charger to prolong your battery life.
The Escape web site says the 19' comes with a "55 Amp Converter with Battery Charger". Does anybody have any details about what this is?
I guess before I commit to purchasing anything I'm going to have to spend a lot of time finding out manufacturers/model#s for all the individual components...
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Doug
2013 Escape 19 ("The Dog House") , 2018 Ford F150
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09-24-2012, 07:45 PM
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#5
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Senior Member
Join Date: Jun 2010
Location: Central, Pennsylvania
Trailer: Escape#5 2022 E19
Posts: 26,268
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Re: battery voltage
Just like there are over 100 different car manufacturers, there are dozens of converter brands. Some are basic, some are quite complicated. The one in the Escape is a capable 3 way charger and if you get the solar option your batteries will be extra happy.
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Jim
Sometime life gets in the way of living.......
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06-20-2014, 10:01 AM
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#6
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Senior Member
Join Date: May 2012
Location: Halifax, Nova Scotia
Trailer: 2014 5TA/ *012 17B (previous)
Posts: 442
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Do you recharge 2- 6 volt batteries the same way as a 12Volt with a battery/trickle charger? Or do you do something different with the 6 volts?
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Min D
Chapi II
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'Have No Regrets'
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06-20-2014, 10:29 AM
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#7
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Commercial Member
Join Date: Apr 2014
Location: Hillsboro, Oregon
Trailer: 2014 Escape 21 - "Felicity"
Posts: 2,945
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I just treat dual batteries like one big 12V; works fine on a 12V charger since they're in series
__________________
Charlie Y
Need custom storage to your design? Don't drill holes!
www.RVWidgetWorks.com
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06-20-2014, 11:28 AM
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#8
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Senior Member
Join Date: Nov 2008
Location: Janesville, WI, Wisconsin
Trailer: Escape 19 (sold) Escape 21 2014
Posts: 1,884
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I guess I will step to the pulpit of the great battery debate. In any charging situation you should start with the battery manufacturer. See what their recommendations are for charging voltages. If you are still OEM and using dual 6 volt you will have Interstate U series or its replacement the GC2-XHD. Secondly, as prior posts said, you should use a three stage charger: bulk, absorption and float/trickle. The key number is the absorption charge rate, this is what stage your battery will be in the majority of the time it is needing a charge. Compare the rate your battery manufacturer recommends with what your charger of choice will deliver.
I have gone through this process and was surprised at what Interstate Batteries or Trojan recommend and what most chargers deliver. If your charger does not publish charge rates for the three stages stated above you can be assured they are woefully inadequate.
After reading the blog by Handy Bob, the RV battery guru and researching what chargers are provided by Escape the best of those methods to charge is the built in WFCO battery charger. Notice, I am qualifying this by saying of the provided options, there are better methods to charge and to get more charge into you battery but they require options other than come standard on your Escape. It does not appear that there are any "bench" chargers that can do as good a job as the built in charger made by WFCO.
The big controversy is over how much charge these devices are putting into your battery, surprise! they are only filling the tank about 75%. Now if you only use your batteries for 2-3 days between shore power or you do not have much need for solar power you can stop here and everything will work just fine. However, if you are off the grid for extended times and have numerous power needs or desires; then you should Google Handy Bob and read his blog.
The battery voltages you read after disconnecting are irrelevant, you need to wait several hours for the surface charge created by the charging process to dissipate. A full battery will read 12.6 to 12.8 volts but the problem is; a battery charged to 75% of capacity will read the same as one fully charged. Those voltages, while useful, do not fully measure the charge in your battery. There is more to measuring a battery than volts.
So the easy answer is, charge using the built in charger provided by Escape, but run that charger for at least 24 hours. The hard answer is you are only getting to 75% of that batteries capacity.
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Paul and Janet Braun
2003 Toyota 4Runner V8 now 2012 Toyota Sequoia V8
Escape 19' 2010 now 2014 Escape 21'
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06-20-2014, 02:14 PM
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#9
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Senior Member
Join Date: Feb 2010
Location: Phoenix Metro Area, Arizona
Trailer: 2014 Escape 19
Posts: 767
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06-20-2014, 02:39 PM
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#10
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Senior Member
Join Date: Nov 2008
Location: Janesville, WI, Wisconsin
Trailer: Escape 19 (sold) Escape 21 2014
Posts: 1,884
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Doug, thanks for posting the work of Harold in replacing the WFCO controller with the Xantrec. That is a nice article he published on the process and logic of the conversion. What Harold did not mention in his article is the bad rap, perhaps deserved, that the WFCO never achieves a charge to your batteries at the bulk rate of 14.4 V. Several users talk about tricking the WFCO into bulk mode by turning on lights, pumps and furnace before charging. All in an effort to get to the bulk rate. Unfortunately unless you are successful you will get the absorption charge rate of 13.4 V.
What's wrong with 13.4 V you may ask? Here is where the 75% fill comes into play. If you are filling the tank (battery) at 13.4 V you are not even close to the charge rate that Interstate recommends. When all is said and done you are left with a functional battery but not one with the charge it could have if charged at the proper rate.
__________________
Paul and Janet Braun
2003 Toyota 4Runner V8 now 2012 Toyota Sequoia V8
Escape 19' 2010 now 2014 Escape 21'
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06-23-2014, 10:04 AM
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#11
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Senior Member
Join Date: Sep 2010
Location: Kelowna, British Columbia
Trailer: 2008 Escape 17b
Posts: 1,868
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If, for convenience sake, additional charged 12v batteries were carried in a tow vehicle, could they be connected to the trailer via the 7 pin plug and augment the trailers battery bank?
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06-23-2014, 10:06 AM
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#12
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Senior Member
Join Date: Feb 2010
Location: Phoenix Metro Area, Arizona
Trailer: 2014 Escape 19
Posts: 767
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Quote:
Originally Posted by J Mac
If, for convenience sake, additional charged 12v batteries were carried in a tow vehicle, could they be connected to the trailer via the 7 pin plug and augment the trailers battery bank?
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Connected - yes. Augment - no.
The wiring is too small to carry enough current to be useful.
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06-23-2014, 10:12 AM
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#13
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Senior Member
Join Date: Sep 2010
Location: Kelowna, British Columbia
Trailer: 2008 Escape 17b
Posts: 1,868
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but will it become part of the useful trailer battery bank?
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06-23-2014, 10:14 AM
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#14
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Senior Member
Join Date: Sep 2010
Location: Kelowna, British Columbia
Trailer: 2008 Escape 17b
Posts: 1,868
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My thinking:
If a portable solar panel can charge the trailer batteries through the 7 pin, couldn't pre-charged batteries?
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06-23-2014, 10:31 AM
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#15
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Commercial Member
Join Date: Apr 2014
Location: Hillsboro, Oregon
Trailer: 2014 Escape 21 - "Felicity"
Posts: 2,945
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Electrically the charged battery will add to the discharged trailer battery, but without a controller involved you definitely risk frying your small gauge 7-pin wiring if the trailer battery was deeply discharged.
Too great an imbalance in charge between the two is going to cause a large current flow - I'd want 8 gauge or better 12V wiring for your approach.
A portable solar panel is a whole lot lighter, too!
__________________
Charlie Y
Need custom storage to your design? Don't drill holes!
www.RVWidgetWorks.com
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06-23-2014, 10:36 AM
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#16
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Senior Member
Join Date: Sep 2010
Location: Kelowna, British Columbia
Trailer: 2008 Escape 17b
Posts: 1,868
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Thank you tractors and jamman. I was just a thought.
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06-23-2014, 11:00 AM
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#17
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Senior Member
Join Date: Jun 2010
Location: Central, Pennsylvania
Trailer: Escape#5 2022 E19
Posts: 26,268
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I know when you connect 2 different batteries of different capacities and different charges, the weaker one will cause a discharge from the stronger one in an attempt to equalize. Not good.
__________________
Jim
Sometime life gets in the way of living.......
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06-23-2014, 11:57 AM
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#18
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Senior Member
Join Date: Sep 2010
Location: Kelowna, British Columbia
Trailer: 2008 Escape 17b
Posts: 1,868
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Thanks cpa
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