Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 02-15-2017, 02:46 PM   #1
Senior Member
 
Join Date: Jul 2011
Posts: 160
1 or 2 batteries

Hi all,
I've done some reading in this forum about this, but haven't come to a conclusion yet. I have a Rockwood 2604 (2011 model year) that came with the standard hybrid battery. It went bad in 2 years, so, not knowing any better, I replaced it with another hybrid battery. It also went bad in 2 years. We had hoped to spend a night in a parking lot while traveling, but the CO alarm started sounding 30 minutes after I shut the truck off. After doing research here, I have:

1) replaced lights with LED
2) replaced WFCO converter with PD 4655 MBA
3) added switch to fridge to turn off heating strip

It's time to replace the battery. We don't boondock as a rule. The biggest thing I need is to spend 1 or 2 nights without hookups as we travel. We always get a site with at least electric when we get to the destination, so I don't need as much reserve as others. I am undecided between 2 GC2 (Duracell made by East Penn) from Sam's Club or a single 12v Duracell AGM Deep Cycle Marine and RV Battery - Group Size 31 from Sam's Club (also made by East Penn). Cost wise, there is very little difference. The "rest of the story" is that if I put 2 batteries on the A-frame, I will have to remove them every time I want to check torque on the Equalizer hitch mounts (I currently check each trip) as there is no room for a torque wrench between a double battery box and the nut. Also, I am up against my max tongue weight, and 2 batteries just adds that much more weight.

In your opinion, with my set of circumstances, how much do I lose by deciding in favor of 1 battery vs 2?
__________________
K_and_I
K= DW and I
2017 Ford F250
2011 Rockwood 2604
K_and_I is offline   Reply With Quote
Old 02-15-2017, 02:52 PM   #2
Senior Member
 
Join Date: Mar 2014
Location: Saint Louis
Posts: 1,451
With whatever battery you get, make sure you get a battery disconnect. When not using your Trailer, use the disconnect.

People tend to kill their batteries due to parasitic draw getting their batteries below 50%
__________________
2015 Ram 2500 4x4 6.4l with 2015 Sandpiper 25RLS
Wife, myself and 2 furry kids
Mountndream is offline   Reply With Quote
Old 02-15-2017, 02:55 PM   #3
Senior Member
 
Join Date: Jul 2011
Posts: 160
Thanks for responding. I should have mentioned that I leave the camper plugged in year round at home. The WFCO was not going into maintenance mode which is why I replaced it.
__________________
K_and_I
K= DW and I
2017 Ford F250
2011 Rockwood 2604
K_and_I is offline   Reply With Quote
Old 02-15-2017, 03:02 PM   #4
Site Team
 
bikendan's Avatar
 
Join Date: Jan 2007
Location: Camano Island, Washington
Posts: 25,195
Well, your truck is only providing a trickle charge while traveling.
If you don't want a generator, your best choice would be two 6v golf cart batteries.
Then 1 or 2 overnights, even using the furnace, should be fine.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
bikendan is online now   Reply With Quote
Old 02-15-2017, 03:24 PM   #5
Senior Member
 
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 1,471
Quote:
Originally Posted by K_and_I View Post
In your opinion, with my set of circumstances, how much do I lose by deciding in favor of 1 battery vs 2?
You lose over 1/2 the available amp hours with one Group 31.
One Group 31 will give you about 100 AH while two GC-2 will give you about 220 AH.
__________________

2007 Surveyor SV230
- 200 Watts Solar/MPPT Controller - 230 AH Battery Bank (Two-GC2) - 600 watt PSW Inverter - (2) 2000 watt Inverter Generators - LED Lighting
2009 F150 - 5.4 Litre - Tow Package
Boon Docking 99% of the time.
boondocking is online now   Reply With Quote
Old 02-15-2017, 03:32 PM   #6
Senior Member
 
Join Date: Jul 2011
Posts: 160
Thanks for the replies. I'm still trying to understand what 100 AH means in real life. I read of people getting 4 days (24 hour periods) of use on 2 gc batteries. I'm looking for 2 12 hour periods with a trickle charge between. The question for me is: is the trade off between 220 AH and 100 AH enough to offset adding 60 pounds to a tongue weight already at 1020 pounds, and having to move 120 pounds of batteries to torque the hitch brackets?
Thanks for your patience. I'm not arguing, just trying to truly understand.
__________________
K_and_I
K= DW and I
2017 Ford F250
2011 Rockwood 2604
K_and_I is offline   Reply With Quote
Old 02-15-2017, 03:55 PM   #7
Senior Member
 
Join Date: Aug 2016
Posts: 612
Quote:
Originally Posted by Mountndream View Post
With whatever battery you get, make sure you get a battery disconnect. When not using your Trailer, use the disconnect.

People tend to kill their batteries due to parasitic draw getting their batteries below 50%
In a couple of days on the road, the effect of parasitic draw will be negligible.
johnbryanpeters is offline   Reply With Quote
Old 02-15-2017, 06:33 PM   #8
Senior Member
 
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 1,471
If it is just parasitic draw you will be OK with one battery. If you run the furnace and lights etc at night on your way to your destination it will be quite a bit more than negligible.
__________________

2007 Surveyor SV230
- 200 Watts Solar/MPPT Controller - 230 AH Battery Bank (Two-GC2) - 600 watt PSW Inverter - (2) 2000 watt Inverter Generators - LED Lighting
2009 F150 - 5.4 Litre - Tow Package
Boon Docking 99% of the time.
boondocking is online now   Reply With Quote
Old 02-15-2017, 09:17 PM   #9
Senior Member
 
HONDAMAN174's Avatar
 
Join Date: Jun 2011
Location: Big brown desert
Posts: 2,960
Try to remember that draining batteries past 50% is what hurts them in long run. So actually you only have HALF usable amp hrs.

I appear to be rough on batteries. First pair of group 24 lasted 1 year. Second set of interstates lasted 18 months. Switching now to 2 6v Trojans 125's with 240 amp hrs. Paid $75/ each here.
__________________
2014 Stealth Evo 2850- "Woodstock"
2011 Toyota Tundra Rock Crawler TRD 5.7- "Clifford"
2013 Honda Accord Coupe V6 w/Track Pack- "Julia"

Just glad to get away
HONDAMAN174 is offline   Reply With Quote
Old 02-15-2017, 09:58 PM   #10
Senior Member
 
Join Date: Apr 2016
Posts: 974
If you leave the camper plugged in year around at home may have led to the short life on the batteries if you didn't add water that was boiled off. IMHO to have twice the power for about 65 pounds tounge weight seems like a fair trade. X2 on battery shut off. If your not using the unit at home, shut off the batteries, and unplug the unit. Jay.
Jay2504 is offline   Reply With Quote
Old 02-15-2017, 10:41 PM   #11
Ben f
 
benf's Avatar
 
Join Date: Mar 2016
Location: Cambridge NY
Posts: 133
One other thing to check is to make sure the battery box has holes drilled in the bottom. My battery would drain when it rained because the water would cover both the positive and negative terminals, thus killing my battery in 2 years. I also started bringing the batteries into the basement in the winter and using a trickle charger every month or so to top them off. Have lasted much longer.
benf is offline   Reply With Quote
Old 02-15-2017, 11:36 PM   #12
Senior Member
 
SailorSam20500's Avatar
 
Join Date: Jun 2016
Posts: 3,753
Quote:
Originally Posted by K_and_I View Post
Thanks for the replies. I'm still trying to understand what 100 AH means in real life.
You need to add up the amp draw of the stuff you want to run. I don't have one, but there are lists of common amp draws for furnace, refrig, lights, etc. If you total is say 12 amps, divide the battery capacity by your draw. 120 amp hour battery / 12 amp draw = 10 hours.

The hard part of this is for the furnace - the blower cycles on and off, so you need to come up with the average amount of time it will be "on".

If you do a search on solar, those threads usually have lots of info on this kind of stuff.
__________________
Al
Save the Earth. Its the only known planet with Beer.
When everything is coming your way, you're in the wrong lane.

S.E. Mich. Flagstaff 26FKWS / 2019 F-150 3.5 EcoBoost SCrew Propride
SailorSam20500 is online now   Reply With Quote
Old 02-15-2017, 11:45 PM   #13
Senior Member
 
NMWildcat's Avatar
 
Join Date: Jun 2012
Location: Southern NM
Posts: 6,801
We have always used two 24 or 27 series interstate batteries in all our rigs, from pop-ups to current fifth wheel. Always use a negative side cutoff. Batteries life averages 4.5 years. We mainly boondock and never run out of battery, even when running the heater all night. Recharge with generators. When at home, I ensure they are fully charged and then use the disconnect. If not using the rig will recharge batteries every 6 weeks or so using converter. Simple.
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder
NMWildcat is offline   Reply With Quote
Old 02-16-2017, 09:30 AM   #14
Senior Member
 
Join Date: Jul 2011
Posts: 160
Thanks for all of the replies. The consensus is that I go with the 2 golf cart batteries. That is what I assumed would be the outcome. I just wanted to make sure I wasn't missing anything.
__________________
K_and_I
K= DW and I
2017 Ford F250
2011 Rockwood 2604
K_and_I is offline   Reply With Quote
Old 02-16-2017, 03:19 PM   #15
AKA: 'tiredTeacher
 
awellis3's Avatar
 
Join Date: Jan 2013
Location: Richmond, Virginia
Posts: 989
Quote:
Originally Posted by K_and_I View Post
Thanks for all of the replies. The consensus is that I go with the 2 golf cart batteries. That is what I assumed would be the outcome. I just wanted to make sure I wasn't missing anything.
LOL! Yup, you're missing one thing. What're going to do if ONE 6V fails? (Chances are slim, but... "paging Mr. Murphey").
I travel as you plan to. I overnight in casino parking lots and Walmarts. I use two Grp. 24 Interstates and haven't had a problem. Fully charged they'll last 4 days if I don't need the furnace.
I tow a 2604WS.
__________________
Wright and Penny
(with Fitz and Lizzie, the camping kitties)
Richmond, Va.
2010 Tundra 4X4 5.7L V8
2014 Rockwood 2604WS
Life is a cruel teacher. She gives the test first; the lesson then follows.
awellis3 is offline   Reply With Quote
Old 02-16-2017, 03:29 PM   #16
Pickin', Campin', Mason
 
5picker's Avatar
 
Join Date: Aug 2015
Location: South Western PA
Posts: 14,124
Quote:
Originally Posted by NMWildcat View Post
We have always used two 24 or 27 series interstate batteries in all our rigs, from pop-ups to current fifth wheel. Always use a negative side cutoff. Batteries life averages 4.5 years. We mainly boondock and never run out of battery, even when running the heater all night. Recharge with generators. When at home, I ensure they are fully charged and then use the disconnect. If not using the rig will recharge batteries every 6 weeks or so using converter. Simple.
This has been my experience as well.
Only difference is my cutoff switch is also a selector switch.
One - both - one - none.
I like using two 12v batteries because if one craps the bed, you still have 12v from the other. Can't do that using two 6v.
YMMV.
__________________
_________________________________________
2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '18=51 '19=58 '20=110 '21=94
5picker is offline   Reply With Quote
Old 02-16-2017, 03:33 PM   #17
Senior Member
 
Join Date: Mar 2014
Location: Mountain Foothills of Southern Alberta
Posts: 1,471
Quote:
Originally Posted by awellis3 View Post
LOL! Yup, you're missing one thing. What're going to do if ONE 6V fails? (Chances are slim, but... "paging Mr. Murphey").
Go without power the same as if one parallel 12v goings down and pulls the other one down to zero volts making it useless. Or if your single 12v went down, same scenario.
__________________

2007 Surveyor SV230
- 200 Watts Solar/MPPT Controller - 230 AH Battery Bank (Two-GC2) - 600 watt PSW Inverter - (2) 2000 watt Inverter Generators - LED Lighting
2009 F150 - 5.4 Litre - Tow Package
Boon Docking 99% of the time.
boondocking is online now   Reply With Quote
Old 02-16-2017, 04:44 PM   #18
Senior Member
 
Join Date: May 2016
Posts: 1,363
Quote:
Originally Posted by awellis3 View Post
LOL! Yup, you're missing one thing. What're going to do if ONE 6V fails? (Chances are slim, but... "paging Mr. Murphey").
I travel as you plan to. I overnight in casino parking lots and Walmarts. I use two Grp. 24 Interstates and haven't had a problem. Fully charged they'll last 4 days if I don't need the furnace.
I tow a 2604WS.


If that actually happens, which only seems to be a concern of people that don't use 6v batts, I'll buy a new 6v or 12v battery.

If one boondocks and is really concerned, use 4 6v batteries.

Chances are, if one 12v battery in parallel fails, the other is in bad shape too... by the time the problem is discovered.
325BH is offline   Reply With Quote
Old 02-17-2017, 08:41 PM   #19
Senior Member
 
Join Date: Jul 2016
Posts: 133
I always had 2 batteries on all my campers. The campers I've owned that came with just one battery i always added a battery. 1 battery just doesn't work well when camping off grid for a weekend. With two batteries I never ran out of juice, even for a 3 or 4 day holiday weekend. To me, adding a 2nd battery is a no brainer.
D-Man is offline   Reply With Quote
Old 02-17-2017, 09:00 PM   #20
Senior Member
 
Join Date: Nov 2014
Posts: 205
Whatever your decision, go with actual deep cycle batteries. We were in a similar situation-dual batteries presented a problem regarding space and weight. A many pointed out, running the furnace take a great deal of power and even dual batts will be a stretch. If you run the fridge & water heater on propane the electrical loads should not be that great. We went with a group 31 12v deep cycle (std wet cell, not AGM)from Samsclub. Running lights, a fan, the controllers for the fridge and water heater on propane, and a few other small loads and the single battery will easily go two nights.
If we stay at a CG with power we recharge with AC, otherwise we have a 100 watt solar panel.
pjnlorrie is offline   Reply With Quote
Reply

Tags
batteries

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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 12:31 AM.