burned PowMR 4.2 kW inverter

Описание к видео burned PowMR 4.2 kW inverter

PowMR inverter 4.2kW was installed as should be between grid and house load.
between inverter and a grid there is ATorch with circuit breaker function and OVP256V and OCP 100A

without any heavy load and having electricity from a grid PowMR stoped working, breaking electricity supply to a house and I heard an explosion sound

after I disconnected and opened it I saw this

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