Iaan de Wet Posted December 15, 2020 Share Posted December 15, 2020 Some help please, i have a sunsynk inverter. When the sun sets the batteries are supposed to power the none essential loads In my case the the grid then supply the load and keep the batteries at 100%. In the photos attached I switched off the DC and to my understanding then the Batteries should then discharge into the load. If I manualy then switch off the grid then all in order. Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 15, 2020 Share Posted December 15, 2020 As Vassen says. Your CT coil seems to be connected incorrectly. In your first pic you can put a tick in limit to load then it shouldn't matter if the CT is connected or not. Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 12 hours ago, Vassen said: Is you CT coil connected corrected. From your pic it’s shows zero. Is the battery being detected properly. Can you post a pic of the LIBMS screen. In which scenario is the pictures taken. Grid disconnected? what firmware are you on? Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 12 hours ago, Achmat said: As Vassen says. Your CT coil seems to be connected incorrectly. In your first pic you can put a tick in limit to load then it shouldn't matter if the CT is connected or not. Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 9 minutes ago, Iaan de Wet said: Why do you have the CT coil on inverter. I ran the cable to the DB board and its clamped on feed before the mains switch. Can you take another pic of the connection on the inverter, slightly to the left of that pic where the wires of the CT coil is connected to? Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 6 minutes ago, Achmat said: Why do you have the CT coil on inverter. I ran the cable to the DB board and its clamped on feed before the mains switch. Can you take another pic of the connection on the inverter, slightly to the left of that pic where the wires of the CT coil is connected to? I had it on the DB just moved it to.see it makes n difference Quote Link to comment Share on other sites More sharing options...
JustinSchoeman Posted December 16, 2020 Share Posted December 16, 2020 3 minutes ago, Iaan de Wet said: I had it on the DB just moved it to.see it makes n difference The CT must be on the house's grid input (other side of the non-essential loads). With zero export enabled, the inverter will adjust its feed to the grid side to make the CT reading zero. So with the CT on the line feeding the non-essential loads, these loads will get zero current from the inverter. Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 4 minutes ago, Iaan de Wet said: I had it on the DB just moved it to.see it makes n difference That seems right. Make sure it's in properly and making good contact. Should be in 5 and 6. This is my display. Not pulling from the grid as its supplying the loads and charging the battery. Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 15 minutes ago, JustinSchoeman said: The CT must be on the house's grid input (other side of the non-essential loads). With zero export enabled, the inverter will adjust its feed to the grid side to make the CT reading zero. So with the CT on the line feeding the non-essential loads, these loads will get zero current from the inverter. CT moved back to DB with arrow facing towards the Non essential loads, os this correct ? Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 1 minute ago, Iaan de Wet said: CT moved back to DB with arrow facing towards the Non essential loads, os this correct ? Is that on the main municipal feed? The arrow should point in the direction the current is flowing from the grid into the house. Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 16 minutes ago, Achmat said: That seems right. Make sure it's in properly and making good contact. Should be in 5 and 6. This is my display. Not pulling from the grid as its supplying the loads and charging the battery. Could you perhaps post a photo of your system mode screen Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 3 minutes ago, Achmat said: Is that on the main municipal feed? The arrow should point in the direction the current is flowing from the grid into the house. That is correct Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 3 minutes ago, Iaan de Wet said: Could you perhaps post a photo of your system mode screen This is my system mode screen. You can remove the rock in solar export bat full. Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 I think the CT coil is either faulty or not making contact at the connection. Other option is to try and use 3 and 4. Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 13 hours ago, Vassen said: Is you CT coil connected corrected. From your pic it’s shows zero. Is the battery being detected properly. Can you post a pic of the LIBMS screen. In which scenario is the pictures taken. Grid disconnected? what firmware are you on? 1 minute ago, Achmat said: I think the CT coil is either faulty or not making contact at the connection. Other option is to try and use 3 and 4. Make sense to me that it could be faulty..... had it in 3 and 4 previously with same effect Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 7 minutes ago, Iaan de Wet said: Make sense to me that it could be faulty..... had it in 3 and 4 previously with same effect Thanks will get a new CT a nd try that Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 58 minutes ago, Achmat said: I think the CT coil is either faulty or not making contact at the connection. Other option is to try and use 3 and 4. Will it make sense then that if the CT is faulty that it would then be able to feed back into the grid ? Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 (edited) 5 minutes ago, Iaan de Wet said: Will it make sense then that if the CT is faulty that it would then be able to feed back into the grid ? Yes. If you set it to zero to load then it should not feed back to the grid even if the CT is faulty. Only problem would be that you will not be able to power anything between the grid meter and the inverter from solar or batteries. Edit. CT coil is only there to pick up what is being pulled from the grid and then for the inverter to try and zero the meter by sending excess back to the CT coil. You don't need the CT coil of everything is connected directly to the inverter and there are no loads before the inverter. Edited December 16, 2020 by Achmat Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 16 minutes ago, Achmat said: Yes. If you set it to zero to load then it should not feed back to the grid even if the CT is faulty. Only problem would be that you will not be able to power anything between the grid meter and the inverter from solar or batteries. Edit. CT coil is only there to pick up what is being pulled from the grid and then for the inverter to try and zero the meter by sending excess back to the CT coil. You don't need the CT coil of everything is connected directly to the inverter and there are no loads before the inverter. Only loads is the geyser which is on a timer. Pool pump that is.manually opererated . Aircons but that is normally not run Quote Link to comment Share on other sites More sharing options...
Achmat Posted December 16, 2020 Share Posted December 16, 2020 33 minutes ago, Iaan de Wet said: Only loads is the geyser which is on a timer. Pool pump that is.manually opererated . Aircons but that is normally not run I would then remove the CT coil and change the settings on the inverter to zero to load until the CT coil is replaced. Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 39 minutes ago, Achmat said: I would then remove the CT coil and change the settings on the inverter to zero to load until the CT coil is replaced. Thanks Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 6 minutes ago, Vassen said: Do you by any chance have a multimeter. If yes, disconnect the ct and test the resistance between the 2 wires of the ct. This basically checks the secondary coil to see if there’s continuity. secondly, connect it around a live wire and tear the voltage across the wires. This checks if the primary coil is inducing a current into the secondary. If there is a resistance and a voltage then it should give you some reading on the inverter. Thanks, it is having conituity between the two wires and is measuring 7.47volt Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 3 hours ago, Vassen said: Okay. Then u sure it’s making proper contact with the terminals on the inverter or connected to the right pins. I have the 5kw so it’s different May I ask if you can post a photo of yoir physical connections on the power terminals of your Grid, Gen and Load ? Quote Link to comment Share on other sites More sharing options...
Iaan de Wet Posted December 16, 2020 Author Share Posted December 16, 2020 13 minutes ago, Vassen said: As mentioned , I have the 5kw so the connections are a bit different. I’m also using the gen input to connect to micro inverters Thanks will let you.kno about the ct Quote Link to comment Share on other sites More sharing options...
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