Earth Neutral bond for hybrid inverter (again)

[jimseng]

At the risk or reopening the can of worms and revisiting an old thread I am still wondering about the earth neutral bond relay in the event of a power cut. I have now ordered a Growatt 10k hybrid inverter and according to this diagram (from the Growatt manual) the earth neutral bond is permanent and provided by the DNO at the meter, or wherever it is. (Or at least it seems to be relying on the DNO E/N bond). In the event of a power cut it looks to me like the earth neutral bond still remains in place as the grid and home loads neutrals are connected and therefore the E/N bond is still intact.

I suppose here the additional E/N bond  relay would be necessary if there was a cable fault between the house and the DNO E/N bond, but doesn't that take place in the meter box?

I'll have to have a ground spike anyway given that my grid connection is a way off but once it is in place...what then?

[Mattg4321]

You won't have an earth-neutral bond once the grid is disconnected from your installation by the inverter in the event of a power cut. DNO earth-neutral bond isn't necessarily at your intake position either. It certainly won't be in a TN-S earthing system (although yours is likely to be TN-C-S (PME) if a new connection).

[jimseng]

In the image the load and grid neutrals are permanently tied so even in a power cut there is still continuity to the grid neutral. Surely, unless there is a cable fault, the bond would still remain?