RXV with Lithium Batteries

[otowrxv2]

Have a 2014 RXV that I converted to Allied Lithium batteries a year ago. I converted to the 50 amp hour batteries. Everything was great till about two months ago when one battery went zero volts with 60% capacity left. Then another battery went to zero volts. I found out that this is the internal BMS system acting like a circuit breaker. Allied replaced the two batteries and then a third battery failed!! Anybody else out there experiencing these failures?