|
|
07-06-2021, 04:02 PM
|
#1
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
12V Lithium vs 6V deep cycle batteries
Hello RV'ers,
We have a Montana 40ft 5th wheel with 4 - 6volt Trojan batteries and they lose charge and we have to jump start the batteries to turn on our generator to recharge the batteries. We do have solar panels but the RV is stored under a a roof where no direct sun hits the solar panels, just ambient light from the rear and front of the RV. Wondered about changing to Lithium batteries like the RELiON 12V 300Ah Lithium Battery
Item No. 122875
sale price $3,429.99 was $3,488.95
The 6 volt batteries say 225 AH @ 20 hr - 185 AH @ 5 hr.
Which set up gives me the most energy and will the Lithium lose charge as quick as the deep cycle batteries?
Thanks for the help and advice,
John & Marie
|
|
|
07-06-2021, 04:41 PM
|
#2
|
Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,933
M.O.C. #20477
|
John,
Is your battery bank running down in storage or only with a load on it? Have you added a total battery disconnect to your system?
The 300 ah lithium will provide more power than the Trojan's which should not be taken below 50%. If you don't have a total disconnect you will have the same issue in storage.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
|
|
|
07-06-2021, 04:47 PM
|
#3
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Hi Zack,
we did have a separate kill switch which shuts off power to the whole unit. When we had issues with the batteries discharging to the point where we couldn't use the jacks we realized the power on/off switch in the water valve section didn't shut all power off so we had the kill switch installed. We have always had the issue of batteries discharging even with the kill switch. Monthly I'm adding distilled water to the batteries and have to jump the batteries and start the generator to charge the batteries. So now it's time to find a dealer or RV repair shop that installs the batteries and appropriate monitors. We do have a magnum inverter and have solar panels too.
|
|
|
07-06-2021, 04:51 PM
|
#4
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Here are pics of our batteries
|
|
|
07-11-2021, 02:47 PM
|
#5
|
Seasoned Camper
Join Date: Oct 2019
Location: Peoria
Posts: 80
M.O.C. #25158
|
Lithium
Quote:
Originally Posted by nsdtr3
Here are pics of our batteries
|
Here's what I do. Stored under a roof so no solar. However the storage space has 110 plug, so I have a lithium battery charger hooked up and when the facility turns power on to my row every night for 3 hours it keeps my batteries near 13.2 volts.
|
|
|
07-06-2021, 11:34 PM
|
#6
|
Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,371
M.O.C. #4831
|
[QUOTE=nsdtr3;1226358]Hi Zack,
.... When we had issues with the batteries discharging to the point where we couldn't use the jacks we realized the power on/off switch in the water valve section didn't shut all power off so we had the kill switch installed. We have always had the issue of batteries discharging even with the kill switch. Monthly I'm adding distilled water to the batteries and have to jump the batteries and start the generator to charge the batteries...... /QUOTE]
I guess I don't understand. The batteries should maintain their charge for months with a kill switch. You shouldn't have to add water to batteries that are disconnected. And with the current technology converters, you normally only need to add water ever 4 -6 months.
I think there is a problem with your batteries. How old are they and how many times have then been discharged below 50%? Perhaps testing them would determine their health.
As for lithium batteries, I don't think your 2017 converter is compatible. It will charge them but slowly and not to 100%. And I wouldn't discount the converter as the cause of your current battery problems.
__________________
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
|
|
|
07-07-2021, 07:54 AM
|
#7
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Thanks Carl,
I'll have the RV service center check both the batteries (which have discharged fully many times) and the converter. We have a magnum inverter/converter.
Thanks for the advice,
John
|
|
|
07-06-2021, 05:47 PM
|
#8
|
Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 627
M.O.C. #26690
|
Quote:
Originally Posted by nsdtr3
Hello RV'ers,
We have a Montana 40ft 5th wheel with 4 - 6volt Trojan batteries and they lose charge and we have to jump start the batteries to turn on our generator to recharge the batteries. We do have solar panels but the RV is stored under a a roof where no direct sun hits the solar panels, just ambient light from the rear and front of the RV. Wondered about changing to Lithium batteries like the RELiON 12V 300Ah Lithium Battery
Item No. 122875
sale price $3,429.99 was $3,488.95
The 6 volt batteries say 225 AH @ 20 hr - 185 AH @ 5 hr.
Which set up gives me the most energy and will the Lithium lose charge as quick as the deep cycle batteries?
Thanks for the help and advice,
John & Marie
|
T-105s are great batteries; we used them for years. But they are no comparison to Lithium.
Here is some simple math (maybe you know this...)
-4x 6v/225ah = 900ah@6v = 450ah@12v. So your total 12v capacity is 450ah.
-FLA batteries should not be discharged below 50% or you will severely limit their lifespan. So your usable capacity is 225ah.
-last note; FLA batteries can only charge at about 20% (.2C) of their capacity, whereas Lithium can charge at 80-100% (.8C - 1C). IOW, Lithium will recharge in ~1/4 of the time.
So, to your question:
-300ah Lithium will have more energy and will be able to both discharge faster (to run surges like AC) and to recharge faster (run the generator far less)
-will the Lithium lose charge as quick? Sort of... it does have more energy, so will go longer before completely discharging. But, you have a drain on your batteries, and eventually even the biggest and best batteries will be dead.
If you are spending the money to change out batteries to Lithium, I would highly recommend looking at installing a battery monitoring solution, such as the highly rated Victron BMV-712. This will help you understand the amount of energy being drained, and which draws are happening when. From there, you can start isolating and shutting off those sources of draw. It will also allow you to know when to run the generator to prevent total discharge.
HtH!
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
|
|
|
07-06-2021, 05:52 PM
|
#9
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
12V Lithium vs 6V deep cycle batteries
Thanks Brad,
I'm trying to find an RV dealer here in the Willamette Valley of Oregon that sells and installs the Lithium Battery and now I'll add " I would highly recommend looking at installing a battery monitoring solution, such as the highly rated Victron BMV-712"
Thanks again,
John
Any suggestions on where to buy and have them installed?
|
|
|
07-06-2021, 06:45 PM
|
#10
|
Seasoned Camper
Join Date: Dec 2020
Location: Tampa
Posts: 71
M.O.C. #27783
|
I went with two DIY Game Changer 280ah batteries. Did one in April and found out two would fit perfectly.
My RV pulls 2 watts with the battery disconnect set. Batteries drain about 4% per week (inverter off, leveling jacks, propane, victron).
Hope this helps.
P.S. Lithium batteries don't like being store at 100% SOC. They are much more happy between 35-70%
__________________
'21 Montana 3121RL Legacy Cobalt FBP
'20 RAM 3500 DRW Limited HO 3.73's
|
|
|
07-11-2021, 05:49 PM
|
#11
|
Montana Fan
Join Date: Jul 2019
Location: Mesa
Posts: 279
M.O.C. #24588
|
carlrx7, I'm wondering if it's a good idea to cover those lithium batteries. The BMS modules on the battery tops have cooling fans that need to circulate air when under load.
|
|
|
07-06-2021, 09:57 PM
|
#12
|
Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 627
M.O.C. #26690
|
Quote:
Originally Posted by nsdtr3
Thanks Brad,
I'm trying to find an RV dealer here in the Willamette Valley of Oregon that sells and installs the Lithium Battery and now I'll add " I would highly recommend looking at installing a battery monitoring solution, such as the highly rated Victron BMV-712"
Thanks again,
John
Any suggestions on where to buy and have them installed?
|
The experts on solar for Montana 5th wheels are Future Sales in Indiana. If you want to get in touch, Matt Wolkins is the guy - matt@futuresalesrv.com
They are the designer and builders of the Super Solar Flex system that Montana installs as an option. I have that system, and have reached out to MAtt for information and some upgrades. Recently, I wanted to upgrade my solar controllers; they shipped from the US to Canada within a week, and sent along easy to follow instructions. I've heard of others, including on this forum, who have travelled there and had installations done as well.
Very good to deal with in my experience!
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
|
|
|
07-07-2021, 07:55 AM
|
#13
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Thanks Brad,
Good info,
John
|
|
|
07-07-2021, 12:50 PM
|
#14
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Thanks for the info everyone.
We ordered : (4) 100 Ah 12V LiFePO4 Deep Cycle Battery
$949.00 $899.00
and also a Victron BMV-712 Battery Monitor
After install and a few months pass I'll post my review of the products,
John
John and Marie Simonson
2196 NW Beechwood Pl.
Corvallis, OR 97330
541-752-0693 Home
541-740-2363 Cell
www.beechwoodtollers.com
CH OTCH MOTCH Westerlea's Sir Edmund UDX4 OM1 MH WCX VCX ROMX - SN86833701 - Eddy - (5/26/01 - 8/22/13)
CH CAN OTCH Kilcreek's Sir Winston UDX OM1 MH WCX - SR13221808 - Winston
CH MACH Vermilion's Highpoint Of Edte CDX BN RN JH MXB MJB OF - SR64005706 - Chance
CH Vermilion's Mango Cum Laude JH WC - SR65915401 - Mango
CKC AKC CH Beechwood's The Laugh Of Kahn NF NAJ NA - SR85193202 - Maddy
Beechwood’s Total Solar Eclipse - SS01986208 - Baily - MC #985 112 009 917 094
Beechwood Comes Full Circle - SS13129601 - Rey
Beechwood’s In It For The Money - SS26167501 - Rumor
|
|
|
07-10-2021, 02:46 PM
|
#15
|
Established Member
Join Date: Jun 2018
Location: Corvallis
Posts: 38
M.O.C. #22012
|
Purchased 4 Battle Born Lithium Batteries and Battery monitor gauge. Install in a few weeks at Camping World Wilsonville Oregon.
|
|
|
07-11-2021, 03:06 PM
|
#16
|
Seasoned Camper
Join Date: Jan 2018
Location: Forked River
Posts: 82
M.O.C. #21148
|
Quote:
Originally Posted by nsdtr3
Hello RV'ers,
We have a Montana 40ft 5th wheel with 4 - 6volt Trojan batteries and they lose charge and we have to jump start the batteries to turn on our generator to recharge the batteries. We do have solar panels but the RV is stored under a a roof where no direct sun hits the solar panels, just ambient light from the rear and front of the RV. Wondered about changing to Lithium batteries like the RELiON 12V 300Ah Lithium Battery
Item No. 122875
sale price $3,429.99 was $3,488.95
The 6 volt batteries say 225 AH @ 20 hr - 185 AH @ 5 hr.
Which set up gives me the most energy and will the Lithium lose charge as quick as the deep cycle batteries?
Thanks for the help and advice,
John & Marie
|
Too many problems with Lithium batteries at this point not to mention you need a different charger. They are also prone to being a fire hazard so check with your insurance company first before spending big bucks on batteries. If your Trogan batteries are good and there's nothing drawing them down they should hold a charge for a long time. Lead acid batteries are only good for about five years.
|
|
|
07-11-2021, 03:23 PM
|
#17
|
Seasoned Camper
Join Date: Oct 2019
Location: Peoria
Posts: 80
M.O.C. #25158
|
New technology in lithium batteries, Battleborn, has made them the safest batteries out there. 10 year life, rapid recharge, ability to discharge to 0% with no damage. Expensive, yes, but way too many advantages to ignore. Different technology than cell phone or hoverboard lithium. Will never do lead acid, heavy high maintenance batteries again.
2020 3761FL
2020 GMC DENALI 4WD 3500 DRW
|
|
|
07-12-2021, 06:12 AM
|
#18
|
Seasoned Camper
Join Date: Jan 2018
Location: Forked River
Posts: 82
M.O.C. #21148
|
Quote:
Originally Posted by Speck56
New technology in lithium batteries, Battleborn, has made them the safest batteries out there. 10 year life, rapid recharge, ability to discharge to 0% with no damage. Expensive, yes, but way too many advantages to ignore. Different technology than cell phone or hoverboard lithium. Will never do lead acid, heavy high maintenance batteries again.
2020 3761FL
2020 GMC DENALI 4WD 3500 DRW
|
You can do what you want but I'm involved with an insurance claim on so called "safe" Lithium Iron Phosphate Magnesium batteries that thermally ran away without being connected to anything and during my research I found that it wasn't an isolated case! Many Tesla's have had car fires although you don't hear much about it and that is the same technology.
|
|
|
07-12-2021, 06:23 AM
|
#19
|
Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
|
Quote:
Originally Posted by RVDH
You can do what you want but I'm involved with an insurance claim on so called "safe" Lithium Iron Phosphate Magnesium batteries that thermally ran away without being connected to anything and during my research I found that it wasn't an isolated case! Many Tesla's have had car fires although you don't hear much about it and that is the same technology.
|
Tesla's do NOT use LiFePO4 chemistry.
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
|
|
|
07-12-2021, 06:52 AM
|
#20
|
Seasoned Camper
Join Date: Jan 2018
Location: Forked River
Posts: 82
M.O.C. #21148
|
Quote:
Originally Posted by bcrvman
Tesla's do NOT use LiFePO4 chemistry.
|
That's not the point! they all have had this type of problem, they need to be monitored, special chargers, and if you do go that route make sure you buy the ones that are housed with an aluminum liner inside the battery so your RV doesn't burn up with the batteries.
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|