From: Lucas Criens.
lucresai@hotmail.com
date: 12082019
Subject: BMS.
Dear Sir,
Heaving seen several youtube video’s from different producers I am confused.
Intro;
I live in Curacao N.A. 12 degrees N 68 W just north of Venezuela.
I have 27 solar panels each 195W--- 44.8VOC----36.94Vmp----5.28 Imp
1 Tristar TS-M-2 MPPT__60A
1 Victron MPPT 150/85 TR
1 BMV-700
1 Victron inverter24/220V—5000Va
8 Winston LiFePO4 700Ah batteries.
Set 123 Smart BMS
The solar panels are divided in 2 strings ,
one of 12 panels series paralel on a Morningstar Tristar MPPT TS_M_2
one of 15 panels series paralel on a Victron MPPT 150/85 facing south on a 8 degree angle
Max power supply 150 amps to the batteries
Info.
We use the system off grid.
I am not happy with the 123 smart bms as 50 % PCB failures after 3 months
Soon after midday with both strings on the batteries are full and the BMS leds constant on & dumping.
Therefor I only run one string and at the end of the day all are 90% full and BMS leds still flashing.
With an inverter AC running at night the batteries were at 50% early in the morning.
I disconnected an inverter AC and now Early in the morning the batteries are at 65%.
Max solar total charge meassured is 150Amp.
All batteries have a belly at pressent.
Question.
As the 123 Smart BMS has in 3 moths failed 3 intermediate and 1 In pcb I presume they can not handle the power or whatever as the Balancing current =1A.
I am looking for a more robust straight forward reliable BMS and would appreciate your advice on this item as you have tested several different bms es.
Kind regards Lucas
lucresai@hotmail.com
date: 12082019
Subject: BMS.
Dear Sir,
Heaving seen several youtube video’s from different producers I am confused.
Intro;
I live in Curacao N.A. 12 degrees N 68 W just north of Venezuela.
I have 27 solar panels each 195W--- 44.8VOC----36.94Vmp----5.28 Imp
1 Tristar TS-M-2 MPPT__60A
1 Victron MPPT 150/85 TR
1 BMV-700
1 Victron inverter24/220V—5000Va
8 Winston LiFePO4 700Ah batteries.
Set 123 Smart BMS
The solar panels are divided in 2 strings ,
one of 12 panels series paralel on a Morningstar Tristar MPPT TS_M_2
one of 15 panels series paralel on a Victron MPPT 150/85 facing south on a 8 degree angle
Max power supply 150 amps to the batteries
Info.
We use the system off grid.
I am not happy with the 123 smart bms as 50 % PCB failures after 3 months
Soon after midday with both strings on the batteries are full and the BMS leds constant on & dumping.
Therefor I only run one string and at the end of the day all are 90% full and BMS leds still flashing.
With an inverter AC running at night the batteries were at 50% early in the morning.
I disconnected an inverter AC and now Early in the morning the batteries are at 65%.
Max solar total charge meassured is 150Amp.
All batteries have a belly at pressent.
Question.
As the 123 Smart BMS has in 3 moths failed 3 intermediate and 1 In pcb I presume they can not handle the power or whatever as the Balancing current =1A.
I am looking for a more robust straight forward reliable BMS and would appreciate your advice on this item as you have tested several different bms es.
Kind regards Lucas
