Help with charge settings on Outback FM80 and Eco-Worthy 48V 100ah LiFePo4 batteries

[Andocalrissian8]

Hey all, I am replacing some lead acid batteries with 2 Eco-Worthy 48v 100AH LiFePo4 batteries in parallel. Since my Outback FM80 and vfxr3648 and Mate3 are a bit older, they don't really talk to the new batteries with built in BMS of the eco-worthy batts. Can't find any definitive numbers for charging parameters to manually program into the FM 80. Any help or advice would be grwatly appreciated.

thanks,
Anderson

 

[42OhmsPA]

Welcome to the forum.
I would bulk to ~56V, hold for an hour and float ~54V; disable any equalization charge.

I'm sure others more familiar with that controller will chime in but those settings will be plenty safe.

 

[sumpower]

If you have Battery Temperature Compensation enabled for the lead acid bank, It must be disabled for any Lithium chemistry.

 

[K7TH]

Hey all, I am replacing some lead acid batteries with 2 Eco-Worthy 48v 100AH LiFePo4 batteries in parallel. Since my Outback FM80 and vfxr3648 and Mate3 are a bit older, they don't really talk to the new batteries with built in BMS of the eco-worthy batts. Can't find any definitive numbers for charging parameters to manually program into the FM 80. Any help or advice would be grwatly appreciated.

thanks,
Anderson

The FM80/60 systems CAN charge using a voltage preset to the battery manufacturers settings for the batteries. This is known as open communications (means charger does NOT communicate to the BMS). Therefore, the safest way to charge using the FM60/80 is to make sure the charge voltages are NOT temperature compensated, no equalization (since they usually are higher). So IMHO, charge to say 58.0 max, float at the manufacturer settings so that the BMS hopefully does NOT disconnect /shutdown the battery. I have a FM60 (now in the box) due to moving (I Hope) and those settings worked fine for me on my EW100Ah SR and DCHouse GolfCart systems.