Used Lithium Battery Info

[dragondoom295]

Hello! I'm new to solar and lithium batteries. I got a good deal (I hope) on two used lithium batteries and am trying to find out some info on them, especially what kind of amperage I can pull out of the BMS. See attached pics for BMS and battery. I was told it was a 100 amp hour li-ion, with an available 60 amp max draw from the BMS. However looking up the battery info (A123 ANR26650m-1B) I think they are lifepo4 ~80 amp hour batteries. Would someone be able to help tell me what's what here?

Also, what about the BMS amp rating and is there a way to change it or do I need a new BMS if I want to draw more amps? I'm concerned about the wire size on the batteries, they look really small. Can I remove them and solder on bigger wire?

My goal is to make a 2000 watt 12v portable solar power station/generator. I already have a 60 amp MPPT and a 2000 watt 12v inverter. Along with a sterling power BB1230 for dc-dc charging.

Once I figure out the batteries, I'm sure I'll have questions about the power station build. Thanks in advance!

 

[NVS]

Those cells look like 2500mah or 2.5ah cells. If they are in a 4s20p configuration like it appears in the pictures that would make the 50ah batteries. The BMS looks to small to use for what you want to do. 2000W ÷ 12v = 166.6 amps.

 

[dragondoom295]

Thank you for the help! Yes, they are 2.5ah cells, but it is a 4s32p configuration. Would this be 80ah then?

Can I upgrade the BMS to a higher amp model? Or, preferably, use a high amp relay to handle the higher load with the BMS acting as the switch trigger? (https://batteryhookup.com/products/te-connectivity-ev200aaana-500a-0-900vdc) if I did this I imagine I would have to increase the wire gauge coming from the battery? Thanks in advance for the help.

 

[NVS]

Yes that would be 80ah. Yes you will be able to upgrade the BMS on them just make sure the BMS is able to be paralleled to another.