Do I need one 12V BMS or two BMS?

[Luke_OutdoorsMan]

I bought 8 Lithium Iron Phosphate prismatic cells from ezeal to make a backup battery system. I made 2 of 12V banks, going to put them in parallel, do I need one 12V BMS or two BMS?

 

[Kevin D Pem]

The biggest advantage is obviously price in choosing one BMS. When using one BMS you are making what is known as a power wall. The draw back is the cells can have balancing issues over time. I try to put safety first so more apt to use two BMS circuits. In the long run two will likely save you money over the wall when done right.

 

[Luke_OutdoorsMan]

The biggest advantage is obviously price in choosing one BMS. When using one BMS you are making what is known as a power wall. The draw back is the cells can have balancing issues over time. I try to put safety first so more apt to use two BMS circuits. In the long run two will likely save you money over the wall when done right.

Thank you for your helpful information, I will just go with two BMS.

 

[Kevin D Pem]

Oh that choice also ups the amp draw capacity