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04-24-2023, 01:00 PM
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#21
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,155
M.O.C. #1920
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Tony, high temp isn’t a problem. Here is a link to several solutions. https://www.montanaowners.com/forums...Battery+heater
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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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04-24-2023, 01:04 PM
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#22
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,394
M.O.C. #4831
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Turning off the breaker to the converter is half of the solution. You also need to stop the Victron solar from trying to charge. How you do that is beyond me.
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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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04-24-2023, 01:58 PM
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#23
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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Quote:
Originally Posted by Carl n Susan
Turning off the breaker to the converter is half of the solution. You also need to stop the Victron solar from trying to charge. How you do that is beyond me.
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I could just shut it off in the Victron app.
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-24-2023, 06:00 PM
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#24
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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I just discovered that my Victron Controller battery type is set to rotary switch and I can't see what setting it's on. Can someone tell me what manual setting should be for flooded batteries? I'm wondering if the rotary switch is incorrectly set? Maybe the reason I lost a battery?
I also assume that changing the Victron to lithium is the only setting I have to change in the app once I upgrade?
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-25-2023, 04:31 AM
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#25
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Seasoned Camper
Join Date: Apr 2022
Location: Wauchula
Posts: 85
M.O.C. #30834
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My Victron MPPT has a bluetooth connection and an app. You can override the rotating knob in the app
__________________
Fulltimer Domicile: Florida SKP Resort, Wauchula, Florida
2016 Montana 3611 RL Legacy - 2000w Solar, Victron whole house power, 1200ah Chins LiFePO4, RV Armor roof, Verizon 5G Home Internet
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04-25-2023, 12:31 PM
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#26
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 946
M.O.C. #30262
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Quote:
Originally Posted by Foldbak
I just discovered that my Victron Controller battery type is set to rotary switch and I can't see what setting it's on. Can someone tell me what manual setting should be for flooded batteries? I'm wondering if the rotary switch is incorrectly set? Maybe the reason I lost a battery?
I also assume that changing the Victron to lithium is the only setting I have to change in the app once I upgrade?
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Tony there are numerous parameters for your Victron MPPT that will need to be tailored to the specific LIFEPO4 batteries you decided upon. I'm pasting the parameters for our SOK batteries only as an example of the information you'll need to gather before updating new parameters for your specific batteries. Ron Ames has a SolarFlex FB page where one can learn a lot as well.
Example:
Battery Voltage: Set depending on system, normally 12v.
Max Charge Current: OK to set as high as desired, but no more than 50a per battery
Charger: Enabled
Battery Preset: User Defined
Expert Mode: ON
Absorption Voltage: 14.6v
Float Voltage: 13.8v
Equalization Voltage: 14.6v
Rebulk Voltage Offset: 0.40v
Absorption Duration: Fixed
Absorption Time: 15 Minutes (This allows for proper cell balancing)
Tail Current: Disabled
Equalize Current: 0% (For safety we don’t want equalization at all.)
Automatic Equalization: Disabled
Equalize Stop Mode: Automatic (On voltage)
Maximum Equalize duration: 0 Minutes
Manual equalization: DO NOT CLICK START
Temperature Compensation: Disabled
Low Temperature Cutoff: Disabled (unless you add a temp sensor, the BMS has this protection built in)
I'm learning as well, but PM me if you want to kick around ideas.
__________________
Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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04-25-2023, 01:17 PM
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#27
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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Quote:
Originally Posted by Lee-CI
Tony there are numerous parameters for your Victron MPPT that will need to be tailored to the specific LIFEPO4 batteries you decided upon. I'm pasting the parameters for our SOK batteries only as an example of the information you'll need to gather before updating new parameters for your specific batteries. Ron Ames has a SolarFlex FB page where one can learn a lot as well.
Example:
Battery Voltage: Set depending on system, normally 12v.
Max Charge Current: OK to set as high as desired, but no more than 50a per battery
Charger: Enabled
Battery Preset: User Defined
Expert Mode: ON
Absorption Voltage: 14.6v
Float Voltage: 13.8v
Equalization Voltage: 14.6v
Rebulk Voltage Offset: 0.40v
Absorption Duration: Fixed
Absorption Time: 15 Minutes (This allows for proper cell balancing)
Tail Current: Disabled
Equalize Current: 0% (For safety we don’t want equalization at all.)
Automatic Equalization: Disabled
Equalize Stop Mode: Automatic (On voltage)
Maximum Equalize duration: 0 Minutes
Manual equalization: DO NOT CLICK START
Temperature Compensation: Disabled
Low Temperature Cutoff: Disabled (unless you add a temp sensor, the BMS has this protection built in)
I'm learning as well, but PM me if you want to kick around ideas.
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Thanks for this Lee! Appreciate it!
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-26-2023, 01:48 PM
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#28
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Seasoned Camper
Join Date: Oct 2019
Location: Peoria
Posts: 80
M.O.C. #25158
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Lithium
Quote:
Originally Posted by Foldbak
Ok I just pulled the trigger on batteries. Used my air miles and cost me nothing but grief from DW. I ordered these. Thoughts?
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Battleborn was my choice. 10 year warranty. Absolutely recommend. Double the price but they are great. I have three, recovery time is fast. Boondockers dream
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04-26-2023, 03:00 PM
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#29
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Established Member
Join Date: Jul 2018
Location: Chandler
Posts: 18
M.O.C. #22231
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Lithium Batteries
I don't know about you but I'm best buds with the local dealership service manager and I pester him with questions but do most of the work myself. Not so with my lithium batteries but we discussed the subject a few times before pulling the trigger.
1. Had 4 - 6v batteries that we replaced by 2 - 12v lithium batteries = approx 200 lb weight savings plus 10 year warranty.
2. Replaced lithium ready converter to a dedicated converter for lithium batteries - otherwise lithiums won't be fully charged (as explained to me)
3. I do have 2 - 160w solar panels with residential fridge. Only limiting bondoggle items now are waste tanks and fresh water but we can go quite a while before those items come into play.
4. 40k miles in the last few years (all over US heat and cold) plus live in AZ. Heat never bothered lithium charging. Batteries are behind my propane tanks in the front so no direct heat. One could always move them up under the master bed but it'll never get hot enough to do that.
5. Best change I ever made - so far. Might go to Vroom slide if my Schwentek slide ever goes out again (one of the drive motors went out).
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04-26-2023, 04:19 PM
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#30
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 807
M.O.C. #21158
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My truck is able to maintain the battery with the resifridge running. It does have a high output alternator but I don’t know the numbers offhand.
__________________
Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, at our private winter site in GA
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04-26-2023, 07:24 PM
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#31
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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I received the batteries today and had them installed in 45 minuets. I was disappointed that they don't fit in the battery box. Their about 1.5 inches longer. I did a temporary install until I can get a bigger box.
I shut everything off, switched the converter to LI, changed the Victron Solar to LI and turned all back on. I didn't do any custom settings in Victron. See the pictures. 1 batt was at 71% and the other was at 90% out of the box. I'll check in an hour.
Are there any other custom settings recommended? Oh ya and I just lost 100lbs! DW happy
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-26-2023, 07:41 PM
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#32
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 946
M.O.C. #30262
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Since lithium batteries don't offgas, no need to put them inside a battery box unless that is what you prefer. Forgot to rotate my phone. It's raining here. And yes for those who are extra observant - I still need to move the ground wire for the hydraulic brake pump to the output side of the shunt.
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04-26-2023, 07:58 PM
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#33
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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Oh ya and I changed the battery shunt settings. Look correct?
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-26-2023, 08:03 PM
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#34
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 946
M.O.C. #30262
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If that isn't spot on, it should be real close Tony. Only way to me certain is to check with a manufacturer's rep for their preferred parameters. Looked like a good start to me
__________________
Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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04-26-2023, 08:10 PM
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#35
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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So I'm concerned that I'm not at 14.2 - 14.6. I don't see that in the app. What am I missing?
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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04-26-2023, 08:18 PM
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#36
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 946
M.O.C. #30262
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Need to go dowm the list in the example and find:
Battery Preset: User Defined
Expert Mode: ON
That will get you to the prompt set your Absorption Voltage parameter
__________________
Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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04-27-2023, 06:07 PM
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#37
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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I left the inverter on with shore disconnected for 9 hours. The fridge was running. I returned to find the batteries at 28%. I checked the solar voltage vers battery voltage and solar was lower. I don't think the solar is sett correctly. Suggestions?
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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05-08-2023, 12:12 PM
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#38
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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I think I got the settings correct. The batteries are preforming well. I did realize that the Bluetooth app is redundant with Victron. I set the battery shut off at 32 degrees. As far as turning off the charging over 114 degrees, the built in BMS has a disable charging function.
I'll be dry camping this weekend at the beach. This will be the test. My understanding is 25 minuets of charging per 10% of discharge. The solar should charge to 100% during the day. We'll see how long it takes the gen to charge after the sub goes down. Already 100% better then lead acid and lost 100 lbs of tongue weight!
I'll update.
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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05-08-2023, 01:25 PM
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#39
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Montana Fan
Join Date: Apr 2021
Location: everywhere, USA
Posts: 281
M.O.C. #28634
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Welcome to the world of LIFPO4! You may want to take the cold charge shutoff temp up a few degrees just for safety I have mine set at 41. That would give me time to address the situation before the temp drops lower. I chose to heat the battery bay and keep it at 50 degrees. I have 9 100ah Relion batteries and it is too large an investment to risk damage from low temp charging. The specs from the OEM for my batteries are below, just as an example.
Charging Temperature
LiFePO4 batteries can be safely charged between -20°C to 55°C (-4°F to 131°F). However, at temperatures below 0°C (32°F) the
charge current must be reduced, until the temperature is >0ºC (32ºF), as follows:
1. 0°C to -10°C (32°F to 14°F) charge at 0.1C (10% of the battery capacity)
2. -10°C to -20°C (14°F to -4°F) charge at 0.05C (5% of the battery capacity)
__________________
2021 Montana 3761FL, 9 LIFPO4 batteries & 1700 watts of panels w/ Multiplus II 3K inverter and 30amp DC to DC charger from truck. 8k Dexter axles w/ Kodiak disc brakes.
2019 6.7 diesel F350 DRW with Banks derringer and 4"exhaust, airlift bags, 25k B & W Companion hitch, 45 gal. aux. diesel tank and 14k Winch, just in case!
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05-08-2023, 03:09 PM
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#40
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,263
M.O.C. #30417
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Quote:
Originally Posted by Todd & Mary
Welcome to the world of LIFPO4! You may want to take the cold charge shutoff temp up a few degrees just for safety I have mine set at 41. That would give me time to address the situation before the temp drops lower. I chose to heat the battery bay and keep it at 50 degrees. I have 9 100ah Relion batteries and it is too large an investment to risk damage from low temp charging. The specs from the OEM for my batteries are below, just as an example.
Charging Temperature
LiFePO4 batteries can be safely charged between -20°C to 55°C (-4°F to 131°F). However, at temperatures below 0°C (32°F) the
charge current must be reduced, until the temperature is >0ºC (32ºF), as follows:
1. 0°C to -10°C (32°F to 14°F) charge at 0.1C (10% of the battery capacity)
2. -10°C to -20°C (14°F to -4°F) charge at 0.05C (5% of the battery capacity)
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Thanks Todd. I think I'll raise it to 40. I do plan on getting a heating pad at some point. I live at 1500 feet and only see temps below 32 about 20 days a year.
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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