Chockies

Just took the CT coil to them

Quick update on my situation... I took a chance and went straight to the Sunsynk service center and asked if they can please test my CT Coil - Ten minutes later they came back and confirmed it was faulty and gave me a new one, no questions asked! Hooked it up today - And everything is working as expected!! 🥳🎉 Definitely best to test with PV off - Can confirm that if your little Eskom smart meter says you are using 1.4 kW, then the CT reading on the inverter must also show 1.4 kW. I noticed there is a variance of about 10 - 20 watts, but believe this is ok

What part of the first page am I missing? The suggestion to use 5&6 ? From reading the 5.5 kw Sunsynk inverter manual, 3 & 4 is for the CT coil and 5 &6 is for Gen Startup Relay. I can try 5&6, but it sounded like everyone has come to the agreement that for the 5.5 KW inverter it should be 3&4. @Scorp007 Unfortunately my installer hasn't been great at configuring the inverter - I was also wondering about slave vs master, but a very quick google landed me on a forum where they say to leave as is (slave) with one inverter. Also changed it to master and it caused a fault and alarm bells ringing, so changed it back. Yes, I agree on the timer settings - First want to stabilize the system before starting with optimization. @ZaydS - Yes I watched that video a couple of times, which is why I tested with PV off. There is a brief moment in the video where it shows a CT and LD reading which are very close to each other, which added some fuel to my fire thinking I am right in what the readings should show, but I haven't been able to find solid examples with different scenarios of what the CT reading should be. If you can share any, I would be greatful!

Another installation, another CT Coil related issue I've read just about every forum (including this thread), sunsynk manual, literature and video I could find relating to this topic and tried to follow every advice I could find, but I just can't seem to get a correct CT reading... At least not based on my understanding - The CT Coil should be reading the amount of current coming from the grid. System Mode - Zero Export only selected. In my mind, this means that the reading should show more or less the same KW usage as what my eskom "smart" meter shows - But as you can see it is waaay off - In the test, I was drawing a combined load of 1.9 KW while my DC/panels are off and system timer is off which I believe is best practice while testing - 1kw was attributed to a non-essential pool, and the rest was essential load. Should the CT reading show 1.9 kw as that is what is flowing through the CT? The CT is installed in the box on the outside of my house's wall on the main feed line - The arrow is pointing towards the inverter (as documented) and the white wire is connected to port 3 and black to port 4 - Using a Sunsynk 5.5kW inverter, so believe this is correct - Also when switching either around, the reading becomes negative so pretty sure everything is the right way around. I did extend the cable - The total length for the testing cable is just about 10m +- a couple of centimeters. I used CAT6e cable and only one pair - I also matched the twist direction (i think) as suggested. It is currently lying along the floor to eliminate any other interference. Attached is all other settings I though might be relevant. Is the CT Coil model and specs correct? Is there something wrong in my understanding? Any settings that should change? How do I as a non-electrician test that the CT coil by itself is working correctly? Last question to check my understanding - When you change the system mode to "Limit to load", it then uses an internal CT coil and does not need the external one, right?