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LiFePO4 Plus Battery Not Charging with Solar

Hawkgoalie31

New Member
Joined
Jan 11, 2025
Messages
3
Location
California
Hello,

I have a stock Jayco Feather 2024 stock Solar system with a Go Power 30aamp solar controller. When I replaced the stock lead acid battery’s with the LiFePO4 200ah battery it’s not charging the battery. Everytime I check on it it’s like the battery is asleep and the system try’s to wake it up. I switched the controller to lithium battery still no luck. The controller gives me the error code 32 LUE which means it’s not detecting a battery. I am wondering if anyone else has had this problem and what the fix should be.
 
BMS likely powered down in the battery. You need to check the manual on the battery and confirm the BMS is running, if it is not get it running. If the BMS is running and the voltage is too low then discharge will be disabled and in that condition there will be no voltage and the charge controller won't see a battery. If that is they case you need to get a DC voltage source / charger that will attempt to charge without detecting a battery, and once it charges a bit the battery will show voltage and the solar controller will see it and start charging it.
 
Thanks for the reply. Unfortunately the battery has no controller. However I just ordered battery monitor for it. So once I hook that up I should be able to do that. I did notice when I pulled the control off it was only like 12.4 volts to the battery so maybe I have an inside there as well.
 
If the battery is reading 12.4V it is not shut down. I would first suspect a wiring problem since you just swapped batteries. Error 32 LUE means the SCC doesn't see the battery at all.

Will the battery take a charge from your RV converter? Since you have a 2024 model, I expect your converter is LFP-ready. Even if it isn't the 13.6V FLA voltage will still charge this battery.
 
Yes when I plug the trailer in the battery will charge. Maybe the solar has been not working this whole time because one night I turned the battery on because I wanted to fridge to get cold and by morning time they were dead. Which I would expect them to last longer than over night. This was when I had the old 2 lead acid battery’s but they were brand new
 
A 12V fridge will use somewhere between 35~90 Ah per day, depending on a lot of factors. It's not surprising it would kill an FLA battery overnight.

I would track down the wiring between the SCC and battery and prove you have good continuity. Note that there may be a hidden fuse or DC circuit breaker somewhere in that path. It might be a self-resetting breaker, or one that has a tiny reset button on the side of the breaker can. Mine is hidden underneath the coroplast underbelly - impossible to get to without some disassembly. I hate how RV's are assembled...

Does the GoPower SCC remain powered at night, or does the display go dead? You can check this by covering your PV panel with a blanket. The SCC should keep operating on battery power. If the display is active with no solar, that would prove you have a good battery connection.
 
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