Reply
 
Thread Tools Display Modes
Old 09-29-2016, 01:56 PM   #1
Senior Member
 
Join Date: Oct 2013
Posts: 127
Battery charging help

I have a Rockwood TT on a 5 month around the country trip. Parked at a friends house for 2 weeks and stayed inside. I closed the unit up but forgot to turn the battery shutoff. Well the smoke & Carbon dioxide alarms went off signaling a low battery. So thought I'd power up the day before I leave to cool the frig b/4 I put food in it. So to charge the battery I plugged in the truck 7 pin connector. Well after almost 2 hrs the TT battery indicator still registers still low. Question. Is the reason it's not charging the battery is that the truck is idling? Any info is appreciated.


Robb
__________________

__________________
robbdrell is offline   Reply With Quote
Old 09-29-2016, 02:13 PM   #2
Senior Member
 
raspivey's Avatar
 
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,274
Amperage is way too low to recharge a battery that way. You can maintain it that way but you'll never recharge it. Your best bet is to plug into shore power if you can get to it and let your converter charge it for a while. If you're using a 15A plug to do it, you should be able to charge and run the refrigerator down at the same time provided you don't run the AC and make sure the cord is heavy duty and as short as possible. The charger will draw some decent amps while the battery is low so I'd run the refrigerator on propane while this is going on.
__________________

__________________
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
raspivey is offline   Reply With Quote
Old 09-29-2016, 03:18 PM   #3
Moderators' Assistant
 
bikendan's Avatar
 
Join Date: Jan 2007
Location: Camano Island, Washington
Posts: 11,728
Quote:
Originally Posted by robbdrell View Post
So to charge the battery I plugged in the truck 7 pin connector. Well after almost 2 hrs the TT battery indicator still registers still low. Question. Is the reason it's not charging the battery is that the truck is idling? Any info is appreciated.


Robb
Using the tow vehicle to recharge the battery is the least effective method.
Most tow vehicles will only provide a trickle charge while driving.
It would take hours of driving to recharge a depleted battery.
And even more hours if idling.

Your method is a last resort when you don't have shore power, generator or solar for recharging.

Why haven't you just plugged the shore cord into your friends house?
__________________
Dan-Retired Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC
bikendan is online now   Reply With Quote
Old 10-03-2016, 10:43 AM   #4
Senior Member
 
Join Date: Oct 2015
Posts: 872
Odds are your battery is damaged and may not provide its rated capacity anymore. For most folks that is not an issue since they camp at campgrounds and are plugged in.

You may be able to "shock" the battery and de-sulfur the plates with an auto battery charger and run it on a high amperage setting for a bit.

Good luck.
__________________
Skyliner is offline   Reply With Quote
Old 10-03-2016, 11:04 AM   #5
Senior Member
 
Join Date: Mar 2014
Posts: 1,748
Battery cond. is the result of how long your batts were dead, age, etc.. Also, de-sulfer is all hooie as there is no proof that stuff works. Recharge them on a rated charger, buy a battery hydrometer, test each cell and then you will know the batts cond.
__________________
Still Kickin is offline   Reply With Quote
Old 10-03-2016, 11:07 AM   #6
Senior Member
 
Join Date: Sep 2016
Location: SE Michigan
Posts: 1,790
Back when, you could buy a charger with the desulfation mode (which is basically a pulsed high amperage current induced in the basic charge current) but I don't see them offered any more.

All batteries sulfate over time, no matter what type other than a a Lithium-Ion (I think). If it has sulfuric acid and lead plates inside....

I would think that a flooded cell battery would be more prone to eventual death from sulfation than an AGM because the oxide drops to the bottom and eventually shorts the plates..

Or at least that's what I think happens....

One thing I do know for sure and that is, I never buy a pre-charged flooded cell battery, I always buy a dry charged (electrolyte in a separate container) and 'charge' the battery myself. Reason being is that an idle battery sitting on a shelf waiting for a customer to buy it is sulfating it's life away.
__________________
SidecarFlip is offline   Reply With Quote
Old 10-03-2016, 11:16 AM   #7
Senior Member
 
raspivey's Avatar
 
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,274
Quote:
Originally Posted by SidecarFlip View Post
Back when, you could buy a charger with the desulfation mode (which is basically a pulsed high amperage current induced in the basic charge current) but I don't see them offered any more.
They still make them, but they're a little pricey. I use one of these.

CTEK Multi US 7002 - CTEK Battery ChargersCTEK Battery Chargers
__________________
2012 Chevy Tahoe LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
raspivey is offline   Reply With Quote
Old 10-03-2016, 11:33 AM   #8
Senior Member
 
Join Date: Jan 2015
Location: Englewood FL
Posts: 1,516
Progressive dynamics has a desulfation cycle as does the solar charge controller from Bogart, but everybody resists a true desulfation cycle since the voltages (15 or more) could damage attached electronics.
__________________

__________________

2015 335DS
ScottBrownstein is online now   Reply With Quote
Reply

Tags
battery, charging

Thread Tools
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




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

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 -5. The time now is 03:35 AM.