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02-08-2021, 06:32 AM
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#1
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Established Member
Join Date: Jan 2019
Location: Morgantown
Posts: 13
M.O.C. #23289
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Lead acid to AGM
I currently have lead acid batteries in my Monty that need replaced. Since I store for 6 months, I am considering going with the AGM marine battery and a solar charger. Does anyone have this set up? Any recommendations? I would appreciate any input , thanks, terbear.
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02-08-2021, 06:59 AM
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#2
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,135
M.O.C. #1920
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You may want to add more information. How do you use your camper? Do you always stay where you have power? Do you have an RV or residential refrigerator? If you boondock a lot, you may be better going with LiFePo (lithium) batteries or 6 volt golf cart batteries. If you just go campsite to campsite with power, standard 12v batteries will be fine. Either way you can still set up a solar charger.
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Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
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02-08-2021, 07:15 AM
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#3
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Montana Fan
Join Date: May 2017
Location: Columbia
Posts: 144
M.O.C. #19789
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We have two AGM batteries and a solar panel with enough power to keep them charged. We found it getting harder and harder to disconnect the batteries and take them home while the unit was in storage. This has worked for us without problems for the past year. Our only complaint was why did we wait so long.
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Ray and Susan
2017 - HC352 RL
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02-08-2021, 07:19 AM
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#4
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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I switched to agm long ago. They are better suited for rv use. If put on a proper charger any style will hold up well. Batteries are murdered way more often than dying of natural causes.
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2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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02-08-2021, 09:47 AM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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We've always used AGM in our Monty's and haven't had a charger on them in the winter. If you disconnect the ground wire they won't drain and fully charged batteries don't freeze.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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02-08-2021, 10:21 AM
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#6
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,925
M.O.C. #5651
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Agree with DQDick on disconnected batteries. I live in Mesa, AZ and store for all but the summer months. I have a good marine switch and disconnect them for 6-9 months with maybe a few days in the spring for a test run and never have a problem. Oh, I have 6V golf cart batteries, not AGM.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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02-12-2021, 06:27 AM
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#7
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Established Member
Join Date: Jan 2019
Location: Morgantown
Posts: 13
M.O.C. #23289
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Thanks for reply. I store my camper 6 months year in Florida heat. We live in it the other 6. We only have power when using and it never leaves the park. We also have a residential refrigerator.
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02-12-2021, 06:01 PM
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#8
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Montana Master
Join Date: May 2006
Location:
Posts: 1,695
M.O.C. #5751
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It takes a different charger for AGMs, than lead acid.
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02-12-2021, 06:19 PM
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#9
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,898
M.O.C. #20477
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Bert,
The converters in the later models can be set for multiple battery types.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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02-13-2021, 04:58 AM
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#10
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,113
M.O.C. #25165
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In our 2019 3791RD you can set for flooded lead acid, gel, or AGM batteries. The Progressive Dynamics controller doesn't have the mode for Lithium. I have heard some of the newer ones do. Check your model number inside the panel and look up on the Progressive website https://www.progressivedyn.com/suppo...ooting-guides/. They also list the modes you can set.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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02-24-2021, 04:47 PM
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#11
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Seasoned Camper
Join Date: Aug 2020
Location: Edinburg
Posts: 88
M.O.C. #26856
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I have an on the ground solar set up that came with vmax tank batteries. Mine are 125 amps. It came with 4 and I bought another 7 used, so I stuck two in the 5th wheel. I have been super impressed with these batteries and with the customer service. The run about $289 and they weigh 75lbs, so you have to take that onto consideration.
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02-24-2021, 05:01 PM
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#12
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,113
M.O.C. #25165
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The vmaxtanks batteries have really good reviews on Amazon. I've been considering 2 group 27s to replace mine.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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02-24-2021, 08:37 PM
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#13
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Seasoned Camper
Join Date: Aug 2018
Location: Sun City
Posts: 53
M.O.C. #22428
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I have a 381TH with the residential refrigerator, I rarely camp with hookups, 95% of the time boon dock. I installed four 105 amp AGM batteries along with 8 185 watt solar panels. Total cost for everything including Victron equipment, less than $1000.
$50 each for the batteries here in Phoenix, AZ
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Jeff Lawrence
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02-24-2021, 09:15 PM
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#14
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,323
M.O.C. #4831
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Where do you get AGM's for $50? And 8 solar panels, with controller, for under $800 ($1,000 minus the battery cost)?? I will be there in 2 days to pick them up.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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02-24-2021, 11:29 PM
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#15
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Montana Fan
Join Date: Aug 2016
Location: Eagan, MN
Posts: 106
M.O.C. #18907
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I’ll take a few batteries also!
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Kris & Al
2014 Montana 3402RL, Disk brakes, Sailun S637
2019 RAM 3500 Laramie 6.7 Cummins, PullRite 2900 SuperGlide
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02-25-2021, 10:06 AM
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#16
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Established Member
Join Date: Jan 2019
Location: Morgantown
Posts: 13
M.O.C. #23289
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Thanks all for the reply’s. I’m going to replace the 2 lead acid with 1 AGM. We don’t tow anymore, just leave in storage for 6months and pull out to live in for 6. So I think 1 large AGM, should do it.
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02-25-2021, 10:40 AM
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#17
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Montana Master
Join Date: May 2020
Location: UPLAND
Posts: 1,250
M.O.C. #26190
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Quote:
Originally Posted by Terbear
I currently have lead acid batteries in my Monty that need replaced. Since I store for 6 months, I am considering going with the AGM marine battery and a solar charger. Does anyone have this set up? Any recommendations? I would appreciate any input , thanks, terbear.
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Terbear, I faced the same dilemma as you. Just pulled both acid batteries that were 13 months old. They were dry, one recovered fully and the other was shot. Decided to go sealed and not have to worry about having to add water. Picked up these two Duracell AGM Group 34 batteries, which have a rating of 750 CCA, two hundred more than the Group 24's I had. Bought them at Sam's Club for $119.32 each, and they have an 18 month warranty.
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2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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02-25-2021, 11:13 AM
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#18
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,323
M.O.C. #4831
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Quote:
Originally Posted by 432bartman
.....Picked up these two Duracell AGM Group 34 batteries, which have a rating of 750 CCA, two hundred more than the Group 24's I had....
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I hate to burst your bubble, but a battery rated in CCA is not the battery you want. It is a starting battery not a deep cycle one which is what you want in a RV.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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02-25-2021, 11:42 AM
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#19
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Montana Master
Join Date: May 2020
Location: UPLAND
Posts: 1,250
M.O.C. #26190
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Quote:
Originally Posted by Carl n Susan
I hate to burst your bubble, but a battery rated in CCA is not the battery you want. It is a starting battery not a deep cycle one which is what you want in a RV.
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This is not only a starting battery, but is designed for deep discharges in an RV & Boat application..........I'm reading it right off of its application were it says "Duracell AGM Deep Cycle Marine and RV Battery, Designed for Deep Discharges. Am I missing something here?
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2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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02-25-2021, 04:12 PM
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#20
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,323
M.O.C. #4831
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No, but when getting a battery for your RV, look at amp hours or reserve capacity not CCA. CCA is Cold Cranking Amps. You are not starting anything. Look for the highest reserve capacity in a deep cycle battery that will fit your battery location.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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