I had multiple Undervoltage alarms/warnings on L1 Quattro in 3 phase setup out of sudden.
The LOG file shows BYD reporting normal 54.7 V voltage There was a normal load on the system and no overload recorded. The alarms were getting triggered randomly and the log shows wildly fluctuating VE bus voltage
Does the Ve bus take the voltage only from L1 Quattro?
I checked cable tightness in Quattro ( all three phases ) as well as on the LYNX busbar.
Will check later today the breakers and the individual battery module tightness. What else should I check? The system worked for the last 1 year without any major issues.
The system is ONgrid /ESS with 10 KWH BYD pro and 3 ph 5 KVA Quattro with 6 KVA Fronius and 250/70 Smartsolar
The Log is attached - Relevant entries around 10.30 AM are marked in yellow battery alarm log_log_20200620-0643_to_20200621-0643.zip