Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
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 06-22-2015, 05:46 PM   #1
Member
 
GypsyYears's Avatar
 
Join Date: May 2015
Posts: 80
Battery Question

Hi RV fam! I have a newbie question that I can't entirely find a straight answer to on the web, so maybe you all can help out

I made a rookie mistake and left my vent fans open all day, without the generator running or anything - so when I came in later that evening a house battery (I don't think both?) was dead or almost there; none of the lights or anything would turn on in the rig.

So I have a few questions - how do the house batteries maintain charge? Does the generator give them charge / just the engine / etc? When you are sitting without any external power for a while, do you have to leave the engine / generator running to keep the batteries charging?

Since the batteries were dead, the generator wouldn't start, so I turned on the engine, and then the generator. I let the engine run with the generator for about 10 minutes and turned off the engine to see what would happen... About 10 minutes later the generator turned off again.

How do I get the batteries back up to their original charge and what can I do to prevent this from happening again?

Any comments welcome! Thanks for your help guys, this is all so new to me.

__________________

__________________
'04 Brave // Full-Timers working towards Homesteading
Tasha & Joseph and the fur kids - Dukkha and Buddy (woof!) <3 Lady With A Hippie Heart <3 Please follow my Adventures @ https://gypsyyears.wordpress.com/
GypsyYears 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 06-22-2015, 06:58 PM   #2
Senior Member
 
asuperheat's Avatar
 
Join Date: Apr 2012
Posts: 171
The generator should charge the battery's by supplying power to the charger once it is running. Check the oil level in the generator. might be low and shutting off on low oil switch.
__________________

__________________
2014 Excursion 35B
asuperheat is offline   Reply With Quote
Old 06-22-2015, 07:10 PM   #3
Senior Member
 
Tha_Rooster's Avatar
 
Join Date: Aug 2008
Location: Georgia
Posts: 4,516
How much gas do you have, at least 1/4 of a tank? Do you have a volt meter to know how dead your batteries are?
__________________
2007 Fleetwood Revolution LE 40V
Tha_Rooster is offline   Reply With Quote
Old 06-22-2015, 07:45 PM   #4
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,073
The generator quit because you ran out of 12v power again - it needs some 12v to keep running. Charging the batteries for 10 minutes give you aboput 10 minutes worht of usefil power. It will take 24-36 hours of charging for the batteries to get back to 100%, but in 2-3 hours they will be at abput 80%. Typically the range you use when off-grid is 50-80%. For max battery life, don't discharge below around 50%, then charge back to at least 80%.

If you have two house batteries, they were both severely discharged in nothing would work. You can't discharge just one unless you physically disconnect the other.

A pair of decent batteries should easily run the vent fans on low or even medium all day, so you probably had other stuff on as well. Do you have an inverter? They really suck the amps. A pair of the typical 12v marine deep cycles gives you about 80 amp-hours to use before reaching the 50% charge level.
__________________
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 06-22-2015, 08:14 PM   #5
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
Your house batteries may not charge from the generator if the house disconnect was not turned on when you put some charge in the batteries from the engine. Start the engine, start the generator then close the disconnect relay with the switch for it. If that works to charge the batteries, you will need to run the generator for several hours as previously posted. If it doesn't your converter is not charging the batteries for some reason.
__________________
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 06-24-2015, 01:48 PM   #6
Senior Member
 
Join Date: Jul 2014
Location: Granville, NY 12832
Posts: 167
I just completed a lot of battery research on the Internet. I learned a lot....perhaps too much.
First thing to note is if you run a deep cell down below the 50% level it may not ever recover.
Sounds like your batteries are stone cold dead and below that magic 50% mark.
Go to Walmart and buy a battery charger that is designed for recharging deep cell batteries. Remove the dead batteries and try to charge them....if they do not take a full charge return to Walmart and buy new deep cell batteries...tip: measure the space you have for batteries in your RV and up-size your batteries if possible. If you have 12 volt batteries chances are they are group 24 size...Walmart sells excellent high quality deep cells in group sizes 24, 27, & 29....the higher the number the longer they will power your stuff.....the price difference to up size your deep cell battery is not significant....all the websites I checked indicated that it is smart to upgrade if you have the space for a larger battery.

Always maintain your deep cell RV battery....check fluid levels in all the cells at least once a month and add only distilled water to the full mark whenever low....if the fluid level falls below the lead plates the battery will fail.
In freezing climates always bring batteries inside when you winterized your RV.
Put them on that deep cell battery maintaining charger you bought at Walmart.
Do your homework before you buy a charger...not all have the correct design to charge and/or maintain deep cell RV batteries.

Happy Camping!
__________________
Boomster is offline   Reply With Quote
Old 06-24-2015, 02:23 PM   #7
Senior Member
 
Join Date: Jul 2014
Posts: 9,848
My take on this is, the charger/ converter, should have been charging the batteries and supplied power to keep the generator running.

The converter/ charger runs off the generator or the shore cord.

It sounds like your converter/charger is not working, so your low batteries did not charge. May be a fuse, breaker or bad connection.

You need to plug in and see if the volts come up on the batteries.

Once you have confirmed the charger / converter is working, or repaired, then you can have the batteries tested.

They may be OK, but need to be charged. Leave it plugged ina few days, before testing.

If your batteries don't charge, when plugged in or running the generator, get the converter/ charger checked.

You don't need to run out and buy a charger, unless the one in the MH is bad. Then get a replacement one, that fits.
__________________
twinboat is online now   Reply With Quote
Old 06-24-2015, 02:30 PM   #8
Senior Member
 
Join Date: Feb 2009
Location: Ca
Posts: 1,050
House batteries need distilled water added occasionally. Check them once in awhile.
__________________
timetogo is offline   Reply With Quote
Old 06-24-2015, 02:47 PM   #9
Senior Member
 
Hit_the_Rhod's Avatar


 
Join Date: Oct 2014
Location: Salvisa, KY
Posts: 2,435
Our MH is set up where the generator charges the start battery until about 80%, then begins to charge both start battery and house batteries. It is possible that your start battery was low and that your time running the generator wasn't long enough to reach the threshold to begin charging the house batteries, so your batteries didn't get much if any charge. The previous owner added an LED in the cab that tells me when the charging system (either generator, or shore power) had switched over and has begun to charge both the start and house batteries. That's nice to know stuff, but closer to home, I think posters are on the right track in that you should confirm that the battery charger in your coach is actually charging, and that your batteries are full and in good condition.
__________________
Scot & Laura Kellersberger
Newmar 4 wheel drive Dutch Star 3891, 2005 GMC Canyon. Demco Tow Bar & Baseplate U.S.Army (ret)
1985 - 2006
Hit_the_Rhod is offline   Reply With Quote
Old 06-24-2015, 11:23 PM   #10
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
Quote:
Originally Posted by Boomster View Post
Walmart sells excellent high quality deep cells in group sizes 24, 27, & 29
Happy Camping!
Walmart does not sell True Deep Cycle Batteries. What they do sell are Marine deep cycle batteries. Marine deep cycle batteries are starting batteries with characteristics of a deep cycle. They do not have the cycle life of a True Deep Cycle battery. If your always connected to shore power it does not matter which battery type you use. If you do a lot of boondocking you need True Deep Cycle Batteries. The best bang for your buck is two 6V True Deep Cycle golf cart (GC-2) batteries. There are 12V True Deep Cycles but not as available as GC-2. Costco now sells Interstate batteries. My local Costco sells the Interstate GC-2 for $83.99.
__________________
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 06-25-2015, 06:31 AM   #11
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,799
House batteries are charged by 2 or 3 methods (third is optional)

Primary method: Convrter (or the charger module in an inverter if you have one of those) this is powered by either shore power or the generator.

Secondary: Engine alternator.. Only when driving

Optional: Solar.. Only if you have installed it.

NOW: What kind of batteries do you have? IF you let 'em run way way down and they are MARINE/Deep cycle you may have toasted them..

But if they are TRUE DEEP CYCLE (GC-2) then you may not have,, GC-2's (And other true deep cycle batteries) often recover from such a goof.. I would be embarassed to admit how many times that happened to me and those batteries made it to 9 years (7-10 is expected life).
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 06-25-2015, 02:48 PM   #12
Junior Member
 
Join Date: May 2015
Posts: 6
So much to learn and I have not even left my driveway.
My Trail Lite has one battery in a carriage under the cabin.
How does this get charged?
Off the RV as I drive?
Off the power from plugging in?
Can I use the electrical outlets when driving to power a stereo or small slo-cooker?

Thanks RPT
__________________
RPT2015 is offline   Reply With Quote
Old 06-25-2015, 05:43 PM   #13
Senior Member
 
Koop's Avatar
 
Join Date: Dec 2012
Location: Full Timing
Posts: 745
We may be missing an important point here. The fan motor only draws a couple of amps. I can run both of my fantastic fans all day without a worry - 8 hours times two fans at 2 amps each equals about 32 AH. No way will that kill my house battery bank.

The OP either has an inadequate battery bank or his batteries are already toast.
__________________
Mike
2003 Alpine Coach 40MDTS - 400HP Cummins ISL
Can Am Spyder Roadster
Koop is offline   Reply With Quote
Old 06-25-2015, 09:34 PM   #14
Senior Member
 
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 886
Quote:
Originally Posted by RPT2015 View Post
So much to learn and I have not even left my driveway.
My Trail Lite has one battery in a carriage under the cabin.
How does this get charged?
Off the RV as I drive?
Off the power from plugging in?
Can I use the electrical outlets when driving to power a stereo or small slo-cooker?

Thanks RPT

RPT

U have 2 electrical systems, one 12v, that battery, and one 120v when u plug in or if u use an inverter. Unless u have an inverter or a very very long AC cord no you can't use a 120v croc. Your RV battery could be charged if u have a sufficient gauge charge wire from ur tow vehicle or by a converter when plugged in or if the generator is on powering the converter.
__________________

__________________
2004 CRV TOAD/1990 WRANGLER TOAD ROCK BUILT
Forest Grump 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 boondock question Baldtbird.06 RV Systems & Appliances 10 05-19-2015 05:25 PM
Another battery question - chassis battery and inverter cvbdsl Class A Motorhome Discussions 12 04-06-2015 05:30 PM
Battery Question phyllisNchri 5th Wheel Discussion 11 11-12-2014 06:04 PM
Generator starting battery question Jasper7821 RV Systems & Appliances 26 01-30-2014 01:11 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 11:41 AM.


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