I have a 90kVA 3 phase system (6 x 15kVA quattros). I have lost two quattros within 2 days of operation. When the inverter should take over the load something gets stuck and the 315A fuse fails. Then upon replacement of the fuse something inside the inverter will burn out (sparks fire and lots of smoke). This is not something that can be replicated, and is not load dependent, it happens randomly, however, only on grid to battery transition instances. System will run fine for a day with multiple grid to battery cycles and then fail with a one second voltage dip on the grid. Did Victron change some components over the past year or so towards the quattro?
I have 1 second power quality meter data, so I can see exactly what happened at the instant of failure, and on one instance it was just a 1 second dip in grid power that caused the failure. Power consumption at the time was only 2300W for the L1 phase on which the Master inverter failed.
Any ideas will be welcome