I need the community's help to determine if I have a bad cell in a Victron Smart LFP battery or inefficient wiring in my system.
System Description
- 100% Victron system: Lynx Smart BMS; Multiplus II inverter; Lynx Power In; Lynx Distributor; 4, 200 Ah Smart Lithium batteries; 2, Orion DC-DC chargers.
- Because of space constraints, the cable lengths to each battery are not equal in length. All batteries are wired in parallel and cables run to the Power In module but the lengths increase from the positive terminal on Battery 1 (about 6 inches) to the negative terminal on Battery 4 (about 40 inches).
- System has been through dozens and dozens of Absorption-to-Float balancing cycles.
Problem Description
Cell #4 in Battery #4 is imbalanced. (System worked perfectly for about 6 months. The imbalance started about 2 months ago.)
Possible Causes for Imbalance
A) Not really a cell balance problem but a failed cell in the battery >> replace battery.
B) Unequal cable lengths finally caused imbalance >> rewire with equal length cables.
C) Other
Questions
- Would having equal length cables to each individual battery help? (Pos. and Neg. cables to individual battery equal in length but each battery would have different cable lengths.)
- Is there a definitive test to identify a bad cell in a battery?
Thanks for your help!
