@chickenbig 

thanks, the grid port and load port refer to the Emergeny power supply (load port) which isnt connected or operative in the function settings, its referred to as the EPS 

im not sure what you mean by concept of installation? i will try to do a quick sketch of the layout but its identical (as far as i can tell) from the layout shown in the manual

PS - thanks for sticking with me, it must be frustrating when dealing with a numpty like me LOL

Posted by: @misterb

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which isnt connected

It was just your picture of the inverter shows to set of flexible cable trunking connecting to the right had side of the unit. I could not quite make out whether there was a wire coming out of the trunking which goes vertically up the RHS.

Above is the setup from the manual that the electrician followed

I agree with @chickenbig that we need more information on what's connected to the underside of the 3000-SE unit. Another photo perhaps?

There also appears to be a cardboard box on top, which won't be helping with the required airflow past the heat dissipation radiators!

Posted by: @chickenbig

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Posted by: @misterb

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which isnt connected

It was just your picture of the inverter shows to set of flexible cable trunking connecting to the right had side of the unit. I could not quite make out whether there was a wire coming out of the trunking which goes vertically up the RHS.

 

i installed the trunking while i was doing a first fix and attaching everything to the wall, ready for the electrician, thanks for spotting it tand pointing it out though, shows you care ( ❤️ )

Re the cardboard box, you're right it needs moving. It's actually a Seplos 16s BMS with LCD screen that I originally bought last year to build my own battery, but it's not needed ..... Well not by me anyway !

@transparent 

The cables on the left are to/from the battery. 

Next one (for m the left) is the Can communication cable between the battery and inverter as supplied by Sofar 

Then the two CT Cables with the WiFi module in front of them and finally the incoming power supply cable. 

This next three photos are of the CT connections to the cables  the cables from both the solar output and from the feed to the inverter both go into the same connector, the brown box thingy. Does that mean they are both effectively connected to each other, could that be the issue. The CT Cables are connected in the correct orientation as I colour coded them when installing the cables 

Posted by: @misterb

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-- Attachment is not available --

 

Above is the setup from the manual that the electrician followed

Any chance of photos of the CT clamps and the cables which go back to the Sofar inverter (in particular is ethernet cable used, how long the cable run is and whether the signal cables run at a distance from mains wires)? Is the CT clamp on the PV inverter showing the correct power generated? We have established that the CT clamp on the total house load is incorrect, haven't we?

Posted by: @misterb

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the brown box thingy

So your various consumer units are fed off these Henley Blocks. What does the white box at the top (with the cover closed) contain? And what is the Wylex box in the middle right contain?

In terms of wiring the CT clamps, the excessively long unshielded cable between the clamp and the ethernet cable is a little concerning (and probably should have been cut to length). More concerning is how multiple constituent ethernet wires are stuffed into a single wago terminal; I don't think that will help with getting a good signal back to the ME3000SP.

Having seen the photos, I too have a plethora of questions!

Why is the red/yellow "emergency breaker" placed so high up and to the right?
This is what you or the fire-brigade need to get to when things go wrong!

Posted by: @transparent

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Why is the red/yellow "emergency breaker" placed so high up and to the right?

I also wonder about the battery isolation. From the photo is not clear, but from the dangle of the cables I think it breaks just the positive wire. Note that I had trouble finding a reasonably priced DC rated two pole isolator (at least not in the > 100A range).

I too don't like the look of that breaker on the Battery wires. We discussed adequately-sized DC breakers earlier on this topic. You can buy them on eBay or Amazon but note that some are directly shipped from China.

Even so, those battery cables look like they're too thin in the photo.

For a Seplos Mason box I would expect them to be 25mm² but they look like 16mm² which can only carry 110A max. The cable capacity must always be well clear of the breaker's tripping-current.

Posted by: @chickenbig

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I also wonder about the battery isolation. From the photo is not clear, but from the dangle of the cables I think it breaks just the positive wire. Note that I had trouble finding a reasonably priced DC rated two pole isolator (at least not in the > 100A range). 

Do I understand it correctly, that the DC rated isolator should be sized based on the power of the inverter?  My Sunsynk 5kW inverter has a max of 120A, so I used one of these Mersen NH00 with 160A fuses:

https://www.bimblesolar.com/DC-fused-disconnect-2pole

On advice from the Sunsynk manually I used 35mm2 tri rated cable for the inverter to isolator, the Seplos I ordered came with 50mm2 cables.