Let me start of by stating, im not a electrician. My electrician seems to have difficult time solving my issue. He installed the system.
I have a 5.5Kw Sunsynk Inverter and a 5.5Kw Hubble battery.
When the grid goes down, my house plugs test that Neutral and Live are swapped.
When the grid is on the plugs test normal again.
Also. The inverter has a switch-over time for when the DC gives over to AC. In this time period when the grid came back, but the battery is still active my Earth Leakage keeps tripping.
As soon as that handover period done (Grid Only) the EV stays on.
I replaced the EV with a new one.
I planted 2 Earth Rods ( 4ft )
Permanent Neutral Live bonding was made on the DC side ( not with a Relay )
All plugs where tested and I got a new certificate.
I hope I was descriptive enough.
Please give me some advice.