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02-24-2019, 02:21 PM
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#41
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Established Member
Join Date: Oct 2014
Location: Seatac
Posts: 13
M.O.C. #15829
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Cold weather use
I see you’re from Salt Lake and you said you’d test them when the snow clears.
Lithium batteries cannot be charged below 32° The BMS will prevent charging. Cold weather camping will require the battery location to be heated. Pre-trip you’ll need to heat that area before topping them up.
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02-24-2019, 03:01 PM
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#42
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,522
M.O.C. #18081
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In general this is correct, not all lithium chemistries fall into that exact spec. BB batteries can charged down to I believe it's 27 or 24 F. The OP's choice is pretty new to the market and it's been difficult to find specifications. Keeping your batteries above freezing however is by no means an engineering feat. Hard styrofoam insulation, aquarium or 3D printer bed heating blankets along with a relay and thermistor... Voilà. If you camp in very cold weather often then I would recommend mounting them inside your coach in a more climate controlled area.
__________________
SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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02-24-2019, 03:40 PM
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#43
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Montana Fan
Join Date: Sep 2018
Location: Reno
Posts: 293
M.O.C. #22620
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The biggest danger with Li ion batteries is the requirement for a special charger. The standard converter in your unit may not be compatable with these needs.
"When lithium batteries first appeared, it was discovered that letting them float at 4.2V for a long time would eventually cause some of them to fail. When they do fail, they may vent gas violently, catch on fire, and even cause injury or property damage. The standard way to charge a Lion battery is CC (constant current) followed by CV (constant voltage) with current monitoring. Once the charge current drops to some low level, charge should be terminated. If charge current does not drop after a few hours terminate anyway. And in this case the battery may be bad."
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02-24-2019, 04:49 PM
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#44
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Montana Fan
Join Date: Nov 2011
Location: Albany
Posts: 407
M.O.C. #11972
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You can buy a lot of Centennial deep cycle lead acid batteries for the price of one lithium battery. I keep my Monty on shore power when stored at home. I rarely dry camp (once in 12 years). I got seven years of service our of the pair of Centennial batteries that came with my Monty. The Centennial is a maintenance free battery. Was disappointed that I could not get Centennial again when they failed and had to settle for Interstate. Now I have to check electrolyte levels every 2-3 months. Make sure your converter will change a lithium battery. Last I knew, it took a special converter so that adds to your cost.
__________________
2012 3150RL. G614 tires. Hardwired surge protector. Level-Up Hydraulic leveling.
2013 F-350 Lariat 6.7 PSD SRW SC LB 4X4 OEM hitch, air self-leveling on rear. 57-gallon replacement fuel tank. DieselSite water separator/fuel filter.
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02-24-2019, 05:33 PM
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#45
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,522
M.O.C. #18081
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With all due respect in previous posts within this thread overcharging or more accurately the prevention thereof is handled by the built in BMS within the drop-in replacement LiFePO4 batteries we have been discussing. In addition these drop-in replacements CAN be used with the existing converter/chargers because the BMS will dissipate or retard what the batteries don't want.
__________________
SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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02-24-2019, 06:09 PM
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#46
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,933
M.O.C. #20477
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Quote:
Originally Posted by laverdur
You can buy a lot of Centennial deep cycle lead acid batteries for the price of one lithium battery. I keep my Monty on shore power when stored at home. I rarely dry camp (once in 12 years). I got seven years of service our of the pair of Centennial batteries that came with my Monty. The Centennial is a maintenance free battery. Was disappointed that I could not get Centennial again when they failed and had to settle for Interstate. Now I have to check electrolyte levels every 2-3 months. Make sure your converter will change a lithium battery. Last I knew, it took a special converter so that adds to your cost.
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The advantages of Lithium generally apply to those that want 400-500 ah of battery along with solar to support boondocking. Those that spend most of their time hooked up in a campground are not as likely to jump on the Lithium bandwagon.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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02-24-2019, 08:04 PM
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#47
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Seasoned Camper
Join Date: Oct 2018
Location: West Jordan
Posts: 85
M.O.C. #22840
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Quote:
Originally Posted by makahaskipper
I see you’re from Salt Lake and you said you’d test them when the snow clears.
Lithium batteries cannot be charged below 32° The BMS will prevent charging. Cold weather camping will require the battery location to be heated. Pre-trip you’ll need to heat that area before topping them up.
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What mean by waiting for the snow to clear is melt away and get warm. We camp 8. The mountains and won’t have access until
June.
As far as cold goes there are ways to key them above freezing which I will do to protect my kids investment.
__________________
Glade and Laura
2019 3791RD Montana
2018 GMC 3500 6.6 diesel short bed
Not full timers yet but soon
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02-24-2019, 08:10 PM
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#48
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Seasoned Camper
Join Date: Oct 2018
Location: West Jordan
Posts: 85
M.O.C. #22840
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Quote:
Originally Posted by laverdur
You can buy a lot of Centennial deep cycle lead acid batteries for the price of one lithium battery. I keep my Monty on shore power when stored at home. I rarely dry camp (once in 12 years). I got seven years of service our of the pair of Centennial batteries that came with my Monty. The Centennial is a maintenance free battery. Was disappointed that I could not get Centennial again when they failed and had to settle for Interstate. Now I have to check electrolyte levels every 2-3 months. Make sure your converter will change a lithium battery. Last I knew, it took a special converter so that adds to your cost.
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There is a big difference between us, you don’t dry camp and that is the only kind of camping I do. I may hit a camp ground one weekend during the summer if we take the grand kids out otherwise I never connect to shore power.
And yes my batteries have a BMS in them and work with my charge controller but even if it doesn’t I am installing solar and already have my charge controller connect to my 5er with 1 panel drip charging the interstates the dealer installed.
__________________
Glade and Laura
2019 3791RD Montana
2018 GMC 3500 6.6 diesel short bed
Not full timers yet but soon
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