We have been using several different Victron controllers, including the SmartSolar MPPT TR VE 250/100 but never experienced this issue: one of our solar arrays (5 x 300W panels in series) has worked flawlessly for the last eight months. Suddenly it seems that the total voltage of the PVs went right through the battery side, frying all our electronics (routers, switches, cameras, regulators, radio beams etc.). The controller and the Venus GX (telemetry) got also fried. The system is closed in a concrete climatized and dry bunker and no one had access. So there was no human interaction, no humidity, or high temperature. The total PV voltage was around 168V at that time. Batteries at 24V configuration. There are burn marks on different devices (cameras, regulators, PoE plugs). Batteries have been measured and are fine. Other electronics not directly connected to the DC system survived.
Did anyone experience something similar, and if yes, did you find the cause?
