Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 10-03-2017, 03:44 PM   #1
4hackers
Established Member
 
Join Date: Mar 2017
Location: Lake Zurich
Posts: 10
M.O.C. #19497
AGM Battery Question

I have a 2014 3100RL that needs a new battery. I would like to install one 12v or two 6v AGM batteries. I believe that I read somewhere that not all trailer chargers are compatible with AGM type batteries. Is that true? And if so, how do I figure out if mine will charge an AGM properly? If mine charger is adequate, does anyone have any recommendations on which brand batteries would be best?

A lot of questions, I know!

Thanks
4hackers is offline   Reply With Quote
Old 10-03-2017, 07:14 PM   #2
prndl
Montana Fan
 
prndl's Avatar
 
Join Date: Apr 2017
Location: 1000 oaks
Posts: 172
M.O.C. #19630
AGM's do require a special charger.
AGM's are spendy. Two Duralast 6V GC batteries from Batteries+ will make you happy for less $$$.
__________________
2011 2955RL
2014 RAM 2500 CD
Crew Cab/Short Bed
prndl is offline   Reply With Quote
Old 10-03-2017, 09:21 PM   #3
BuilderBob
Montana Fan
 
Join Date: Sep 2017
Location: Tacoma
Posts: 225
M.O.C. #20475
Interstate battery good 6v golf cart batteries also thats what I put in are's x4 and never
have any problems with battery power.

Bob & Carol
Tacoma WA
2017 352RL 2008 Dodge DRW 4x4 crew cab 6.7L
BuilderBob is offline   Reply With Quote
Old 10-04-2017, 05:59 AM   #4
mjammersc
Montana Fan
 
Join Date: Jul 2015
Location: Fort Wayne
Posts: 360
M.O.C. #17609
To know for sure if your trailers "battery charger" (it is part of the power center AC-DC converter that also does the charging) you'd need to look at the manual and data for the power center you have. A lot of Montanas have the Progressive Dynamic 4500 series power centers. Here is a link to the charge curves for their "charge wizard" https://www.progressivedyn.com/rv/ch...charge-profile


For AGMs, you'd need to see what the battery manufacturer recommends for charging (a lot of the store brands are hard to find details on) but Trojan, who is one of the better battery manufacturers (at least on led acid - no experience with their AGMs) publishes a good manual which is representative of most battery technologies. http://www.trojanbattery.com/pdf/Tro...UsersGuide.pdf


If you look at both sets of data, assuming that is your charge center, the charger circuit puts out a max of 14.4V and per Trojan (page 20), their AGMs need 14.4 for bulk charge phase and up to 14.7V for the absorption and finish phases. So in short, if you have this type of system, the charger and AGM battery charge voltages are compatible.


I'll save the discussion on if the charger in the power centers charge the batteries as well as they should for another day but from what I understand, the newer ones are much better than older ones though they still aren't ideal (compare the curves/voltages/etc and you'll see the centers could use more capability but are a good generic device)
__________________
2016 Montana 3160RL
855W Solar System, TriStar MPPT-60 Controller, Magnum 2800W Inverter, 6 Trojan T-105REs
MOR/Ryde Independent Suspension and Disc Brakes & Storage Tray
2015 Chevy Duramax SRW SB Crew Cab
mjammersc is offline   Reply With Quote
Old 10-04-2017, 08:08 AM   #5
4hackers
Established Member
 
Join Date: Mar 2017
Location: Lake Zurich
Posts: 10
M.O.C. #19497
Thanks so much. This is exactly what I was looking for.
4hackers is offline   Reply With Quote
Old 10-04-2017, 06:33 PM   #6
jcurtis934
Montana Master
 
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 2,139
M.O.C. #13740
I put in one group 31 agm 12vdc battery from west marine (made by the Pennsylvania company that also does decade batteries). Will put in another in parallel when I change out rv fridge for a residential one. I never boondock.
jcurtis934 is offline   Reply With Quote
Old 10-10-2017, 10:51 AM   #7
Golferdave
Seasoned Camper
 
Join Date: Jun 2012
Location: Devon
Posts: 78
M.O.C. #12573
Send a message via MSN to Golferdave
New batteries ?

Quote:
Originally Posted by BuilderBob View Post
Interstate battery good 6v golf cart batteries also thats what I put in are's x4 and never
have any problems with battery power.

Bob & Carol
Tacoma WA
2017 352RL 2008 Dodge DRW 4x4 crew cab 6.7L
Hi Builder Bob: I am golfer Dave from Alberta. I have a 2013 Montana 3800RE new in 2012. Original Interstate 6 volt batteries. Batteries down in charge. Question ? How long do batteries last. We are full timers for the last 13 years. 8 years SOB and 5 Montana.
Thank you for any input.
Happy Trails.
GolferDave.
Golferdave is offline   Reply With Quote
Old 10-10-2017, 07:45 PM   #8
Dam Worker
Montana Master
 
Join Date: Mar 2015
Location: West Richland
Posts: 875
M.O.C. #17164
I looked into AGM batteries when looking to upgrade from single 12 volt battery. I also heard about issues with converters but when I called the company that manufactured the converter in my 2016 Montana he assured me it would work great. If I remember correctly there were some settings that needed to be changed for the AGM BATTERIES. I did not go with them partly because of cost but if one does go bad not every battery store stocks them like they do with the regular deep cycle battery's. If you went with the AGM's they have a better cycle for use, meaning that you can draw them down farther without hurting them. In other words more useable energy before having to recharge. Lots of information out there if you want to take the time for research.

Tom Marty
__________________
Dam Worker is offline   Reply With Quote
Old 10-10-2017, 08:07 PM   #9
coachgrowl
Seasoned Camper
 
Join Date: Sep 2017
Location: ALAMEDA
Posts: 96
M.O.C. #20448
I just installed 2ea 100 AH lifep04 12 volt deep cycle batteries made in Reno by battle born batteries. $899 each plus $19 shipping. weight 29 lbs. removed 2 interstate batteries 43 lbs each. I will never have to change batteries again. Called BBB and they confirmed my 2017 310 RE will charge these batteries. Lead acid batteries must be recharged when they get to 50% capacity or they will start to die.
__________________
2017 Montana High Country 310RE
2017 Ram 2500 Diesel, 4 wd crew cab, slr, pulrite super glide, short bed, 2 ea 100 Ah LiFePO4 12 volt Deep Cycle Battery
coachgrowl is offline   Reply With Quote
Old 10-12-2017, 07:57 AM   #10
TLightning
Montana Master
 
Join Date: Nov 2007
Location: Kville
Posts: 2,613
M.O.C. #7871
coachgrowl...surely you didn't pay $899 per battery??? We have friends with a motor home and replaced the oem batteries with AGM 6volts. Paid $325 installed.

AGMs are great, put them in a forget them, plus no noxious gases.
TLightning is offline   Reply With Quote
Old 10-12-2017, 08:08 AM   #11
PNW Fireguy
Seasoned Camper
 
PNW Fireguy's Avatar
 
Join Date: Nov 2015
Location: Arlington
Posts: 72
M.O.C. #18081
couchgrowl installed lithium oxide batteries. Very different from AGM. Apples and oranges. The price is not reflective or inline with AGM costs.
__________________
*************************************
2015 3440RL, legacy package, Sailun S637's, Onan Commercial gen, Winegard Trav'ler (Dish), 2011 Ram 3500 Laramie dually
PNW Fireguy is offline   Reply With Quote
Old 10-12-2017, 10:13 AM   #12
CORattler
Montana Master
 
CORattler's Avatar
 
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
Quote:
Originally Posted by coachgrowl View Post
I just installed 2ea 100 AH lifep04 12 volt deep cycle batteries made in Reno by battle born batteries. $899 each plus $19 shipping. weight 29 lbs. removed 2 interstate batteries 43 lbs each. I will never have to change batteries again. Called BBB and they confirmed my 2017 310 RE will charge these batteries. Lead acid batteries must be recharged when they get to 50% capacity or they will start to die.
WOW!
They must be made of gold. Hope they meet your expectations.
__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
CORattler is offline   Reply With Quote
Old 10-12-2017, 12:29 PM   #13
coachgrowl
Seasoned Camper
 
Join Date: Sep 2017
Location: ALAMEDA
Posts: 96
M.O.C. #20448
I am pleased with the batteries. 5 year guarantee made in Reno. I never want to lift a battery again. Saved 26 lbs on weight for both batteries.
__________________
2017 Montana High Country 310RE
2017 Ram 2500 Diesel, 4 wd crew cab, slr, pulrite super glide, short bed, 2 ea 100 Ah LiFePO4 12 volt Deep Cycle Battery
coachgrowl is offline   Reply With Quote
Old 10-12-2017, 11:21 PM   #14
CORattler
Montana Master
 
CORattler's Avatar
 
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
Quote:
Originally Posted by coachgrowl View Post
I am pleased with the batteries. 5 year guarantee made in Reno. I never want to lift a battery again. Saved 26 lbs on weight for both batteries.
I can relate on battery weight consideration. My two 6 volt monsters are back breakers.
__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
CORattler is offline   Reply With Quote
Reply

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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 02:42 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.