Charge 12v 100Ah LiFePo4 batteries before wiring in parallel?

[Sugarkryptonite]

Hi guys

I just bought some new 12v 100Ah LiFePo4 from LiTime. I have 4 of them. Do they need to be fully charged individually before connecting them in parallel, or can I just wire them up and charge them as a bank?

Thank you

 

[Q-Dog]

yes. Fully charge each one first.

 

[BryceFreeman]

Fully charge each battery before connection to keep them on the same voltage protecting the consistency of the batteries cells.

 

[time2roll]

If they are within 400 mV just connect and put in service. First cycle they will be all squared away.

 

[Sugarkryptonite]

Guys I fully charged 2/4 of the batteries so far before connecting and one is showing 13.33 other is 13.39v. Good enough? Hoping that the lower one doesn’t have a lower capacity. I charged with a 20a LiFePo4 charger.

 

[Q-Dog]

Fine. Once you have all 4 fully charged, connect them all in parallel, then fully charge them together with that same 20 amp charger. This should even them up.

 

[time2roll]

Guys I fully charged 2/4 of the batteries so far before connecting and one is showing 13.33 other is 13.39v. Good enough? Hoping that the lower one doesn’t have a lower capacity. I charged with a 20a LiFePo4 charger.

Good to go. No worries about capacity.

 

[Sugarkryptonite]

Fine. Once you have all 4 fully charged, connect them all in parallel, then fully charge them together with that same 20 amp charger. This should even them up.

Good to go. No worries about capacity.

Thanks guys