Hello All, as the title states, I have not neutral coming from the grid. Half of my house is old wiring where electrical sockets have two wires and the "neutral" wires connect to ground in the main panel. After a major remodel of the kitchen and prep for solar the other half of my house as well as wiring to my distillery is up to date. Currently all the new wiring is bonded at the main panel neutral bus is bonded to ground bus. 

I have 3 Deye 12kw 3phase inverters I am about to bring online. They have interanl bonding in island mode,(which is how I intend to run).

My question then is where is the best place to do my bonding? (Note: all my loads will be connected to backup side of inverter) Should I bond the incoming line from the grid and let the loads switch bonding. I think this seems unecessary. Should I continue to have a permenant bond on the load side as it is currently wired?

In Slovakia, most houses also do not have a ground rod and rely on ground coming from the grid. However after discussion with the electrician who did my remodel he suggested 2 ground rods spaced a few meters apart and tied to the system. So that is what I have done. I have 2 copper coated rods less then 1 meter from incoming grid power and the room where all the inverters and battery are located. The electrician has been helping me sort through and decide how I want to run the solar but we are both unsure what is best for the bonding since we do still have some old wiring in the house. 

Any insight you all could give would be great. 

1 hour ago, Bixard said:

They have interanl bonding in island mode,(which is how I intend to run)

You say you will be running in island mode but there is grid and loads will switch... It is a bit confusing but I would bond everything on the load side. Are you using earth leakage protection?

I am running all my circuits from the Essentials Load side of the inverter. I dont want to draw any power from the grid directly to my loads. I will be using the grid to charge batteries if needed. 

The switching I am refering to is an automatic switch that I has been essentialy wired backwards. It is intended to used for backup power. If the grid goes down it switches to battery/generator circuit. However I am using it in reverse. If my Solar/Batteries dont have enough power or something fails, it will switch my house back to grid power. 

Currently my electrician bonded neutral/earth at my first the junction panel which splits power to the solar/battery room and my main house panel upstairs. There is no neutral coming from the grid. So currently the bonded neutral is passing to the solar room and back to this junction box and going upstairs to my house panel.

The automatic switch has seperate neutrals for grid and backup(Inverter Load in my case). So currently I have it manually switched to grid power. Solar/Batteries have not been powered up yet. The DEYE has interanal neutral bonding, so I believe we need to do nothing. If grid power goes down the DEYE will internally create a bond and the system will not hiccup. 

Essentlal we are just trying to figure out what is best for all the equipment in the house/Distillery. There is no safety concern for grid, since there is no neutral leaving the house. It does not exist from our network poles.