Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 
 


Reply
 
Thread Tools Display Modes
 
Old 04-24-2024, 12:18 AM   #1
New Member
 
Join Date: Dec 2023
Location: Ontario
Posts: 8
Default AGM to Lifepo4 - Roadtrek zion 2018

Hey friends.

I decided to swap out my old AGM 12V house battery with a Lifepo4 12V 100ah battery. The 2000W inverter/charger (can't find a brand name) doesn't have a lifepo4 setting, so i changed it to a "gel european" setting that has the Charge V (14.4V) and Float V (13.eight) similar to what i've seen recommended on the net for lifepo4. Is this ok?

Hoping for a sanity check from this community. It's also possible that the inverter/charger is not compatible at all. Will have to do the same for the solar controller. Thoughts?
Attached Images
File Type: jpg IMG_6770.jpg (109.5 KB, 35 views)
Goozer is offline   Reply With Quote
Old 04-24-2024, 02:14 AM   #2
Platinum Member
 
@Michael's Avatar
 
Join Date: Oct 2018
Location: MN
Posts: 502
Default

An AGM setting might be compatible too.
__________________
2019 Coachmen Crossfit
My Campervan Modifications and Travel Blog
@Michael is offline   Reply With Quote
Old 04-24-2024, 12:05 PM   #3
Bronze Member
 
Join Date: Dec 2020
Location: Winter Haven, FL
Posts: 26
Default

Can't help with the main question. That looks like a Rubitech unit, may find more info if you can track down the mfg user manual.
__________________
2015 Roadtrek RS Adventurous
HubFlyer is offline   Reply With Quote
Old 04-26-2024, 12:42 AM   #4
Platinum Member
 
Urlauber's Avatar
 
Join Date: Feb 2020
Location: CA
Posts: 513
Default

Quote:
Originally Posted by Goozer View Post
Hey friends.

I decided to swap out my old AGM 12V house battery with a Lifepo4 12V 100ah battery. The 2000W inverter/charger (can't find a brand name) doesn't have a lifepo4 setting, so i changed it to a "gel european" setting that has the Charge V (14.4V) and Float V (13.eight) similar to what i've seen recommended on the net for lifepo4. Is this ok?

Hoping for a sanity check from this community. It's also possible that the inverter/charger is not compatible at all. Will have to do the same for the solar controller. Thoughts?
Many chargers can be used for LiFePO4, they just do not charge them fully or in record time. One option is to top it off to fullness via solar. My GoPower SCC has a Li setting, check yours.

Another thing to keep in mind when swapping is that Li batteries accept higher charge current, so you may have to check the BIM or whatever controls how the alternator charges the battery during driving, you know, to not burn up the alternator.
__________________
2022 Thor Rize 18M
Urlauber is offline   Reply With Quote
Old 04-26-2024, 01:24 AM   #5
Platinum Member
 
Join Date: Dec 2016
Location: America's Seaplane City, FL
Posts: 987
Default

That lfp will not like longa absorb charging, I have mine at set at 14.4 volts and absorption time of 10 minutes. I have float set at 13.25 so as not to stress the batteries. 12.8 on a long term float is detrimental to a long service life.

I'm not sure where you found anyone recommending 13.8 for a lfp, everything I see is 13.4 or less being preferable or no float.

These batteries are not flooded L/A, AGM, or Gel. they have their own preferred(for longer life) settings. It's been a bit weird unlearning L/A properties and learning lfp preferences.
__________________
Tick tock, baby(Ironbuttal)
2000 Roadtrek Chevy 200 Versatile(sold)
'98 Safari Trek 2480
Just for fun:'15 Kawasaki Versys650LT
Perfection is a fantasy, though improvement is possible(Wifey).
SteveJ is offline   Reply With Quote
Old 04-27-2024, 07:19 PM   #6
New Member
 
Join Date: Dec 2023
Location: Ontario
Posts: 8
Default

Thanks all. Appreciate the input. I changed the charge and float specs based on the inverter company’s recommendation for lifepo4 (charge volt -14.0, float 13.7).

Unfortunately, the battery drained completely overnight. I removed the house battery again and will test to see if it keeps a charge. If I rule out a faulty battery, it’s either a setting, systems incompatibility or something else faulty in my electrical system.

See attached photo. Does anyone have an idea what this is (the metal casing with the positive and negative going to it)? One time I left the inverter on by accident and the van floor above this “module” felt hot. Wonder if this is something that could be damaged.

Thanks again
Attached Images
File Type: jpg IMG_6786.jpg (325.4 KB, 31 views)
Goozer is offline   Reply With Quote
Old 04-27-2024, 10:41 PM   #7
Platinum Member
 
Join Date: Feb 2015
Location: Chaska MN
Posts: 1,718
Default

I assume that you have the 2nd alternator/underhood generator. With lithiums they come with a balmar controller, not the built in that comes with the AGMs. You may want to discuss this with Nations Starter who made this for Roadtrek.

There are a few people who have done this switch over the Facebook Zion/Simplicity owners group. I believe that there are also instruction in their file section.
__________________
2021 Promaster 1500 118wb conversion
2019 Roadtrek Simplicity SRT (almost a Zion)
2015 Roadtrek 170
2011 LTV Libero
2004 GWV Classic Supreme
mumkin is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 11:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.