12Ah LiFePO4 Battery Settings?

DIY
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1

I am building some small mobile / portable / regional / remote art pieces.

They use 12Ah lithiums here

These are clearly designed as drop in replacement for common lead-acid alarm panel batteries etc. They are marked as having 18650’s internally and clearly have their own charge / balance electronics.

I had planned to use a SmartSolar 100/20 to keep it charged from a small panel.

Obviously charge current will be set low at 2A (spec sheet says 2.4A max).

Am I alright to specify the LiFePO4 preset in the SmartSolar settings or is there a better custom option?

Thank you!

2

Yes, you can use the profile and enable expert mode to adjust any parameters if required.

3

Care to be more specific on the expert settings that would be better suited to this type of battery?

4

Every battery that gets sold with only 2 power prongs, like the battery you send has an internal BMS to protect the Lithium batteries. So in case of your victron having the wrong parameters the bms inside of the batterie should still protect your indiviual cells, naturally the optimal voltages change a bit, but I would argue that even the stock settings should be fine. Depending on your budget you could even go with a very cheap mppt controller(as long as the battery you are looking at has a bms)

4x 18650 cells full = 44.1 = 16.4V
3x 18650 cells full = 34.1 = 12.3V

4x 18650 cells empty = 42.8 = 11.2V
3x 18650 cells empty = 32.8 = 8,4V

PB full (most chargers) is = 14,8V
PB empty = 10,5 V

IF you get a very cheap MPPT controller that does not allow the parameters to change you will only use about 70% of your max capacity

5

Taking a better look at the battery you provided, they mention a voltage cutt off of 15V, This is only possible with 4s lifepo4 cells. The voltages I send earlier are Liion. Lifepo4 full is 3.6 and not 4.1