So....
Today my 2-signal bms threw the contactor while there was high pv-production(~8kW) and moderate windproduction(~3kW). There was probarbly an overvoltage beacause now all three multipluses are dead and so is the wifi-AP connected to 48V.
Is there any decent protection against these situations?
So far when the battery has been cut I have had 1 cerbo, two network switches, one AP and three multipluses have failed...
The wind turbine is a Bornay 5kW with an MPPT
5x Smart solar 150/35
3x Multiplus-II 48/35/3000
1120Ah LiFePO4 48V
Cerbo/RaspberryPi
Batrium BMS
I have moved the GX, BMS and all the extras to an isolated 24V system that isnt connected to the Lithium-bank so that nothing more will break, but any ideas would be helpful.
Can a multiplus be repaired after over voltage?
Is there an obvious way to protect the setup?
Thankful for all help!