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04-03-2023, 02:18 PM
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#1
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Established Member
Join Date: Dec 2022
Location: Bellevue NE
Posts: 21
M.O.C. #32061
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2022 Montana Inverter Charger for Lithium
I have a 2022 3761 FL and I want to change the lead acid batteries to lithium. Is my rig inverter charger compatible with lithium or do I need to change it to be compatible with the lithium batteries? How can I tell if my rig is ready to just add the lithium batteries?
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04-03-2023, 02:33 PM
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#2
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Established Member
Join Date: Dec 2022
Location: Bellevue NE
Posts: 21
M.O.C. #32061
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I think I found my own answer in the owner's manual. It says the following:
If equipped, the Power Center/Converter Charger has a Dip Switch to change battery charging capability from Lead Acid Batteries to Lithium Batteries. Please refer to the manufacturer's instructions for care and operation. If your Power Center/Converter Charger does not support charging Lithium Ion Batteries, the maximum charge a Lithium Ion battery can receive is approximately 80% of the total battery capacity.
Aftermarket all-in-one or stand-alone converter chargers are available in place of changing your Power Center/Converter Charger. Consult your dealer for more information on making sure your batteries are sized properly to meet
your specific camping needs.
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04-03-2023, 02:49 PM
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#3
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,364
M.O.C. #4831
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If your converter is Lithium capable, there will be a small switch by the green blinking light to switch from LA to LI. It changes your charging profile to lithium
OPTIONAL OUTPUT MODE SWITCH:
The optional OUTPUT MODE SWITCH sets the converter output to either a constant 14.6VDC with the Charge Wizard® disabled (switch in ‘LI’ position) or a nominal 13.6VDC with full Charge Wizard® function (switch in ‘LA’ position). ‘LI’ mode is intended for use with lithium batteries with a BMS requiring a constant converter output. ‘LA’ mode is intended for use with lead/acid batteries where the Charge Wizard® will optimize battery charging.
NOTE: The OUTPUT MODE SWITCH should only be switched when new batteries are installed.
Verify battery type before adjusting the output mode switch.
__________________
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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04-03-2023, 02:51 PM
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#4
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Montana Fan
Join Date: Apr 2021
Location: everywhere, USA
Posts: 281
M.O.C. #28634
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We have a 2021 3761 FL. There is a small switch in an opening by the flashing green light on the converter. If you shift it to the other position, it will be setup for lithium.
__________________
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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04-16-2023, 02:41 PM
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#5
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Montana Fan
Join Date: Feb 2010
Location: Colorado Springs
Posts: 178
M.O.C. #10130
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I have a 2011 3400RL. I am thinking about converting to lithium batteries. Due to the age of the unit will I need to replace the inverter?
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04-16-2023, 02:49 PM
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#6
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,364
M.O.C. #4831
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Quote:
Originally Posted by jdvier
I have a 2011 3400RL. I am thinking about converting to lithium batteries. Due to the age of the unit will I need to replace the inverter?
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Yes, you will have to change the CONVERTER (you don't have an inverter)
__________________
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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04-16-2023, 02:52 PM
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#7
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,693
M.O.C. #24086
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Quote:
Originally Posted by jdvier
I have a 2011 3400RL. I am thinking about converting to lithium batteries. Due to the age of the unit will I need to replace the inverter?
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Not necessarily...
I installed lithium batteries 3 years ago. My converter is NOT lithium ready however by using the "Charge Wizard" button (next to the green flashing light) I can get the lithium batteries to about 90%. I added solar panels later and the MPPT is set to lithium which tops them off.
I like to operate them between 20 and 80%.
They will last longer. I charge them to 100% when boondocking.
Good article on lithium batteries. If you run them between 20-80% they will last longer than your rig...
How to find happiness with lithium batteries
https://www.solacity.com/how-to-keep-lifepo4-lithium-ion-batteries-happy/
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04-19-2023, 01:24 PM
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#8
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 665
M.O.C. #26399
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Quote:
Originally Posted by K2 Camper
I have a 2022 3761 FL and I want to change the lead acid batteries to lithium. Is my rig inverter charger compatible with lithium or do I need to change it to be compatible with the lithium batteries? How can I tell if my rig is ready to just add the lithium batteries?
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If you will also be installing an Inverter, make sure it is an Inverter/Charger and then totally disconnect your existing built in converter, and I mean TOTALLY at the converter supply side so it does not waste power, turning off it's breaker does not do that. I have no idea how many LiFePO4s you plan to get, but if it's 4 or 6 then the new Victron Multiplus II is the best solution. Obviously you will also want the Battery Monitor and the CERBO + Display option
Here is the Inverter/Charger link, the other parts can be found close by.
https://www.victronenergy.com/invert...lus-ii-2x-120v
__________________
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
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