Dear Victron Energy Community members,
I have an off-grid solar system with 1 Victron Quattro 48/15000 Inverter, 1 Venus GX, 1 Pylontech battery hub, 3 Victron MPPT chargers and 25 Pylontech US2000 batteries.
I have installed this system since July 2020 on the mobile clinic boat. (Irrawaddy River Doctors Youtube link )
The boat is a non-profit NGO mobile clinic boat ( named as Irrawaddy River Doctors Mobile Clinic ) that provides health care to people living in villages with difficult access to health in the delta of Myanmar. (Foundation Web Page link)
In the past the boat used 32nos 12V 200Ah AGM batteries and 48v5000W CyberPower inverter and in July 2020 Victron Inverter, new Solar Panels and Pylontech batteries were replaced and installed.
After installing it, there was an Internal alarm, but I was able to use it without any other problems.
However, in March 2023, High Voltage and Low Voltage alarms appeared and even at SOC 80%, the inverter became a shutdown problem.
Therefore, I checked the condition of the battery. I noticed that SOC display leds were not the same with each other.
Then I checked the batteries using battery viewer software and the answers are as follows...
I found that most of the batteries had cell imbalance problems and about two batteries had communication problems.
That problem can not be resolved until now and the battery's performance is further degraded.
Therefore, I submit the measurement results and data. I hope to provide technical support and how to solve the problem as soon as possible.
With best regard,