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Using a CT Coil

Basic understanding of using a CT coil it is used to control the export or import of the power from the grid this is very important and care must be taken when using CT, to ensure it is wired correctly











Note Black is NEUTRAL



25 Comments

Unknown member
Nov 18, 2024

Hi Keith

My 5kw Inverter works very well 2years. The DB9 Wi-Fi unit however just stopped working one day about 10 months ago (No Lights on. I am unsure if it’s the Wi-Fi unit or the port. I am reluctant to ask for a friend’s unit or to try mine in there Sunsynk in case the fault cause damage on their units.

Any Thoughts


PS!

I am now in the process to see how well “Home Assistant” will work with the Sunsynk.

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Unknown member
Nov 18, 2024

Hi Keith. My friend just installed his 10kw Single phase inverter and all works well except the CT does not respond at all. (White on 3 and Black on 4)

Looks like there is another CT connection open on 5&6

Any Thoughts?


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Unknown member
Oct 02, 2023

Is it possible to dispense with the CT and multimeter in integrating the 3-phase 12 kilo infrared unit while connecting them to gel batteries and the diesel generator?

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MOD
MOD
Oct 03, 2023
•
Replying to

It is generally recommended to use tools such as a Current Transformer (CT) and a multimeter. These tools are essential for ensuring safety and proper functionality of the system. While it might be technically possible to assemble the system without these tools, it would be extremely risky. You would be operating blind, without any way to measure or monitor critical electrical parameters. This could easily lead to equipment damage, system failure, or even safety hazards such as fire.

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mavmanji
May 19, 2023

Hi Keith


I am trying to follow all the helpful comments and tutorials from yourself. I am not an electrician minded at all and getting lost in jargon.


Recently had 3.6 inverter installed with 4.8 kW battery. My battery is charging well but the house continues to use the grid for its supply and not the limit of the battery. My electric consumption remains the same as before I had the new inverter and battery. How do I utilise the battery which is charging well but the house even at basic standstill (not occupied - just usual fridges, TV etc) not utilising its charge?


Thanks in advance, Mav

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Unknown member
Sep 26, 2024
Replying to

I had this problem with an SMA inverter.

have you checked the timed charging screen as Keith shows in his video "SunSynk Inverter UI" ?

Not all installers fully understand the equipment they are selling you!

Mine didnt!!

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Unknown member
May 14, 2023

Hi Keith, can you help please. The CT coil is fitted and working but the reading is not correct, it's consistently feeding 190 - 210w back to the grid but the Sunsynk inverter is not identifying this and over reading the load by the same amount. For info the distance of the CT from the inverter is approx 40m. Is there a way of adjusting the readings to compensate for this. (I've tried adjusting the ratio). Many thanks

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johnasmedley
Jun 21, 2023
Replying to

I have the same problem. The cause is electrical noise being picked up by the long cable. I'm looking to see what solutions people have


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