Bizarr…. 48v system with 15kva quattro and a 48/12v dc/dc converter. When the 12v system receives a load surge small or large the inverter shuts down completely. All other victron product shows on Cerbo and 12v dc system still operates fine. NO AC and all lights dead….must shut all systems down and restart to get Quattro to reset. I am assuming that there is a small ripple that is triggering something…. This system has worked flawlessly for 18months.. Any help is greatly appreciated!