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Automatic neutral earth bond


If you need to add a neutral to earth and they should only be done while Inverter is in Island mode as it may cause problems upstream. By connecting a 240 V Relay between the neutral and earth, (normally open contacts) and the coil to the A/T/S signal as shown in the video then this can complete the bond when the inverter is running off grid

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Unknown member
May 11, 2023

Hi Keith and team,


With regards to the ATS signal and the connection to the grid I have a setup where the Inverter is 20 meters away from main DB so I want the Inverter AC Input cables to be earthed i.e. the Inverter AC input is wired downstream from the main earth leak.


The issue that I have is the signal (and I saw it do it in this video) is stopped simultaneously as the connection to the grid is made which then trips most RCD devices (I have tried a couple different brands and they all seem react the same way).


This means I either need to use the grid as a signal which potentially creates a floating…


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Unknown member
May 22, 2023
Replying to

Just an update on the above as I now have seen many people mention. Make sure you are on the latest version (at the time of writing is Firmware M 6.0.2.4 for the 8kW Single Phase) as the issue has been fixed for the RCD. The version I was on 6.0.1.4 still had this issue.

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Lee Guerin
Lee Guerin
Nov 24, 2022

iperation is to slow to meet requirements of bs7671

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Herman Ferreira
Herman Ferreira
Sep 27, 2022

Where is this relay connections on the Sunsynk 8kw inverter

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Hi,


Most Recent SunSynk 5K single phase system no longer has the A/T/S Terminals (although the Island signal box is present in the software)... Does this mean the Earth Neutral Bond has been incorporated into the Hardware and will be enabled in a future Software release?


Pretty much removes the (excellent I might add) UPS function completely if not!

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Righardt Marais
Righardt Marais
Jan 31, 2023
Replying to

Great question. Where you able to fine the answer?

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Could you please maybe post a diagram of the layout that is needed, I got a UPS that makes the SunSynk Earth leakage go down as it checks for the earth and gets upset? Taken it out of the equation for now.

Then second thing when the grid goes offline you get that light glow coming from a LED light which I believe is pointing to a floating neutral

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