Lithium Battery & Charging

[Papahoosh]

I have 2 Battle Born Lithium Batteries (100Ah each), I also upgraded my WF-9855 Converter to WF-9855-AD, which should auto detect the Lithium and charge the batteries to around 14.6 Volt. However, I don’t see it happening and still shows around 13.6V.

Is there anything else I should be doing?

 

[txloser]

It’ll charge at the higher rate but once full they hang out about 13.6/.5. That is fully charged. I’ve got the same converter and different brand lithiums. Sometimes you’ll see 14.2ish as it’s replenishing them. I’ve never caught it at 14.6 myself.

Sounds like it’s working as advertised. Here’s a photo from my solar controller illustrating the same thing, just a different source. It’s just floating at 13.5.

 

[Soundsailor]

I have 2 Battle Born Lithium Batteries (100Ah each), I also upgraded my WF-9855 Converter to WF-9855-AD, which should auto detect the Lithium and charge the batteries to around 14.6 Volt. However, I don’t see it happening and still shows around 13.6V.

Is there anything else I should be doing?

That's fully charged, you'll only see the higher voltage when the charger is in "bulk" mode. Once charged, the voltage goes down even though the battery is fully charged. Once the battery gets used a bit, the charger will use bulk mode to bring it back to charged.

 

[Wichita Dave]

I have a 100AH Battle Born battery. The higher voltage is for the absorption charging phase which ensures that each cell in the battery reaches the same fully charged state. My solar MPPT produces 14.6 volts daily for 30 minutes to ensure absorption. As stated by another, your converter also produces 14.6 volts in bulk mode.

 

[coglesby]

According to WFCO video it has to go through a complete full charging cycle before it detects the battery type.

Also 13.6v is full charge for lifepo4

 

[triplethreat]

According to WFCO video it has to go through a complete full charging cycle before it detects the battery type.

Also 13.6v is full charge for lifepo4View attachment 191072

Most LFP battery manufacturers consider a cell to be fully charged at 3.45V...not 3.4V I know that doesn't sound like much, but with 4 cells in the battery it would be 3.8V instead of 3.6. I know, that doesn't sound like much either, but with LFP batteries, the difference between a few tenths of a volt can be a fairly significant SOC percentage.....especially in the middle area between the upper and lower knee.