Which is more important current or voltage when charging lithium battery

[mrel]

Hello
When charging 100 AH lithium battery.
Have two solar panel 100 watt each 12 volts each.
Do need more current or voltage ,if hookup solar panel parallel would give more current or should give more voltage connect in series when charging the lithium battery.
El

[SunEagle]

It really comes down to what the BMS is looking for. Hopefully your Lithium battery charge has one.

[bhimsu]

Hi SunEagle,
This is my first time. Plese help.
How do I post a question on this forum after logging in?
Thanks.

[SunEagle]

Hi SunEagle,
This is my first time. Plese help.
How do I post a question on this forum after logging in?
Thanks.

You will have to first click on the "Forums" label and then choose one of the Forums and then click on the "New Topic" button at the top.

Let me know if you have any issues after that.

[Ampster]

Hello
When charging 100 AH lithium battery.
Have two solar panel 100 watt each 12 volts each.
Do need more current or voltage .........

You should use a charge controller and it may tell you the best combination of parallel or series..The ideal charging current would be 50 Amps but you can't get there with those panels so the batteries will charge slower. The voltage would depend on the specific Lithium Ion chemistry. LiFePO4 (LFP) typically maxes out at 3.65 volts per cell or 14.6 volts for a nominal 12 volt battery.

Other Lithium Ion chemistries could be higher voltage so you should check the specs of your particular battery and pick a charge controller for that voltage.