Ulwaysultra Posted July 1 Share Posted July 1 Hi All, I am new here I have a Deye 8kw, x20 550W panels, x2 Revov R200 10.2 KW When I switch to "Zero export to CT" some of the load seems to stay on the meter approximately 200-300w and if the house consumes less that 200W it seems to export power. I assume this should not be loading any power on the meter except for the 20w of zero export power. Below I have an image where I set "Zero export to Load" and it shows the CT as negative: https://imgur.com/M55u1Hx And below an image where "Zero export to CT" and it seems to be exporting power when the house is using less than 200w https://imgur.com/wMjm7mt Is this normal or is my CT clamp installed incorrectly? The zero export to load seems to be working as expected. Thanks all Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted July 1 Share Posted July 1 1 hour ago, Ulwaysultra said: Hi All, I am new here I have a Deye 8kw, x20 550W panels, x2 Revov R200 10.2 KW When I switch to "Zero export to CT" some of the load seems to stay on the meter approximately 200-300w and if the house consumes less that 200W it seems to export power. I assume this should not be loading any power on the meter except for the 20w of zero export power. Below I have an image where I set "Zero export to Load" and it shows the CT as negative: https://imgur.com/M55u1Hx And below an image where "Zero export to CT" and it seems to be exporting power when the house is using less than 200w https://imgur.com/wMjm7mt Is this normal or is my CT clamp installed incorrectly? The zero export to load seems to be working as expected. Thanks all When you are drawing from grid must be positive. Your always draw goes negative so CT wrong. You can just swop the 2 wires around in the inverter and check. Ulwaysultra and TaliaB 2 Quote Link to comment Share on other sites More sharing options...
Ulwaysultra Posted July 1 Author Share Posted July 1 @Scorp007 thanks for reply, when you say swap the two wires do you mean the black and white wire of the CT? and do I have to change the direction of the CT clamp? Quote Link to comment Share on other sites More sharing options...
TaliaB Posted July 1 Share Posted July 1 (edited) 1 hour ago, Ulwaysultra said: @Scorp007 thanks for reply, when you say swap the two wires do you mean the black and white wire of the CT? and do I have to change the direction of the CT clamp? Swap the white and black wire on the inverter only don't change the direction of the ct only do one of the two. So if you swap the white and black wires on the inverter then don't change the direction of the ct. If it is easier for you to change the direction of the ct then leave the black and white wires as is on the inverter. Edited July 1 by TaliaB Scorp007 1 Quote Link to comment Share on other sites More sharing options...
Ulwaysultra Posted July 1 Author Share Posted July 1 @TaliaB thanks for the reply Tailab, I swapped the white and black wire as you showed, white was in 5 and black was in 6; I swapped black into 5 and white into 6. However, this seems to have made it worse, check the attached image (Zero export to CT). I then swapped it back to the way it was. Could the distance also be an issue? It is quite far about 30m+ Quote Link to comment Share on other sites More sharing options...
Ulwaysultra Posted July 1 Author Share Posted July 1 @TaliaB just to add, when I set it to 'zero export to CT' the CT only goes red and negative when my house load is below roughly 250w as you can see in the first image. I don't understand why. Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted July 1 Share Posted July 1 13 minutes ago, Ulwaysultra said: @TaliaB just to add, when I set it to 'zero export to CT' the CT only goes red and negative when my house load is below roughly 250w as you can see in the first image. I don't understand why. Using the CT at 30m there is always a great chance that the reading would be wrong unless you can indicate what type of wire was used and how you connected the 2 wires to extend the distance. Due to the distance is the reason for me why the power relay is the better method to read the current value import/export. Quote Link to comment Share on other sites More sharing options...
Ulwaysultra Posted July 1 Author Share Posted July 1 @Scorp007, ok I see I will look into it. Just another quick question I noticed my DC indicator on the inventer is off as you can see in the picture after turning the inverter back on is that normal? Sorry for the random questions I am still learning alot. Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted July 1 Share Posted July 1 11 minutes ago, Ulwaysultra said: @Scorp007, ok I see I will look into it. Just another quick question I noticed my DC indicator on the inventer is off as you can see in the picture after turning the inverter back on is that normal? Sorry for the random questions I am still learning alot. I don't know as I'm not a user of this inverter. I am sure members can answer if it comes on for Battery or PV input. Quote Link to comment Share on other sites More sharing options...
TaliaB Posted July 1 Share Posted July 1 15 minutes ago, Ulwaysultra said: @Scorp007, ok I see I will look into it. Just another quick question I noticed my DC indicator on the inventer is off as you can see in the picture after turning the inverter back on is that normal? Sorry for the random questions I am still learning alot. There is no pv input solid green on means pv input normal. Derek3 1 Quote Link to comment Share on other sites More sharing options...
TaliaB Posted July 1 Share Posted July 1 53 minutes ago, Ulwaysultra said: Could the distance also be an issue? It is quite far about 30m+ Sunsynk/ Deye has a strong recommendation in their user manual not to extend the CT clamp's cable beyond 15m. This is because the transformation ratio of the CT is 100A/50mA, which means 2000:1. For domestic consumption, typically in the tens of amps, the induced current in the CT is small enough for the additional length of the cable to add significant enough resistance to influence the current by the time the inverter measures it at the other end. You need to consult your installer about rectifying the problem. Scorp007, Ulwaysultra and Derek3 3 Quote Link to comment Share on other sites More sharing options...
Ulwaysultra Posted July 1 Author Share Posted July 1 @TaliaB ok I see, thanks everyone for the input Quote Link to comment Share on other sites More sharing options...
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