DB question

[soulie]

What do you mean by this? Surely the same earth should be used throughout the AC in and out side of the inverter.

once your inverter activates it musnt be able to send any fault current back on the earth to the local supply neutral/earth connection .the earth and neutral are one and only split at your board on the E/L unit .this is one of the biggest headaches with an inverter system installed .you get earth points and bonding points ,ive seen installs where the installer connects both together .once inverter is active you are essentially a mini power station and have to be what is referred to an island ,totally isolated.one of the reasons why earthing and bonding are 2 different things , some inverters do it internally some dont

 

[soulie]

What do you mean by this? Surely the same earth should be used throughout the AC in and out side of the inverter.

This may read better than my interpretation there is a lot to an inverter install that sadly most dont ever get right.
SANS 10142
Loss-of-Grid A condition in which supply from the Network Service Provider’s Network is interrupted.
Loss-of-Grid Protection A single or series of protection elements designed to detect a loss-of-grid condition and disconnect the Network Service Provider’s Network from the embedded generator installation’s Network to prevent the embedded generator from energising a portion of the Network Service Provider’s Network.