I have a Multiplus-II 10000kva, 4x BYD batteries (400ah), RS450/100, Cerbo GX.
All devices are on the latest firmware.
ESS is activated with all VEConfig settings done as per Victron/BYD specifications.
Grid feed-in is off, grid setpoint is currently at 200W.
I'm in South Africa, Cape Town.
This is a new installation (1 week old).
About once a day when AC Input is connected, I get an "Overload L1" warning, and from inspecting VRM it appears to coincide with negative amps reported on the AC Input. This normally results in swings in the AC Input current between positive and negative Amps. At the same time the Multiplus's state changes to passthrough, even though there is ample battery and PV available to handle the AC Output load. In the example below the AC Output load was only about 500W when the Overload warning came up.
In the example above, the system returned back to normal operation on its own, but I've had other cases where this happened where the AC swings from negative to positive continued and seemed to get worse, resulting in loud noises from the multiplus and lights flickering in my house. When this happens, I disconnect AC Input, and the system then becomes stable immediately. When I then reconnect AC Input, the system typically behaves fine again.
Does anyone know what could be causing this behaviour ?
