August 14, 20232 yr Hi everyone, I am posting here out of despiration, I hope someone can help. I noticed after my installation that my system was still using ALOT of grid power, between 60-70%. I found this strange as I have a decent sized system and should be 90% off the grid. Here is a link to that post: This is what I have: 8kva Sunsynk inverter 10 x 555w pv panels 12.5kva battery Solar geyser apart from main system. Oven and stove not conected to system. I also posted on Sunsynks forum regarding this, there is a very helpful gentleman on the forum that has assited me with a few pointers. I unticked priority load and limit to load only, under system settings. This from what I understand will help me to use the grid less, which is my main focus. After unticking these boxes my readings on the inverter started to appear incorrect Also from what I understand my CT clamp might be in on the wrong cable and/or facing the wrong direction. Notice the reading of -194watts. Funny thing is that during loadshedding the numbers are correct but when there is grid power the numbers dont make sense. Here we had loadshedding between 12h00 and 02h00: This is how the CT clamp is connected. Any help or advice will be appreciated. Even if someone maybe has the contact number of a technician that has good knowlage of the Sunsynk systems. Many thanks, Oelof
August 14, 20232 yr You need to tick priority load. That will let the system use power from solar (and not prioritise charging the battery). You also need to tick Zero export but untick limit to load. Limit to load = essentials only. You have non-essentials that you want to feed from solar, so you don't want limit to load. But first show us the 2 System Mode screens. Also go to the main screen (press Esc until you see the dials) and then click on battery and show us that too. If you see negative readings under CT, it's pointing in the wrong direction. That will give us an indication whether your CT is pointing in the right direction. I assume your main breaker is the first 63A one on the left. If so, your CT needs to be connected to the red wire that leaves that breaker at the bottom. The arrow on the CT needs to point away from that breaker, ie. pointing towards the rest of your DB. Post those pictures and we'll advise further. Edit: and I've just noticed your Normal light is not on. Has the system been fully deployed or why is that light off? Edited August 14, 20232 yr by p_i
August 14, 20232 yr 25 minutes ago, Oelof said: Hi everyone, I am posting here out of despiration, I hope someone can help. I noticed after my installation that my system was still using ALOT of grid power, between 60-70%. I found this strange as I have a decent sized system and should be 90% off the grid. Here is a link to that post: This is what I have: 8kva Sunsynk inverter 10 x 555w pv panels 12.5kva battery Solar geyser apart from main system. Oven and stove not conected to system. I also posted on Sunsynks forum regarding this, there is a very helpful gentleman on the forum that has assited me with a few pointers. I unticked priority load and limit to load only, under system settings. This from what I understand will help me to use the grid less, which is my main focus. After unticking these boxes my readings on the inverter started to appear incorrect Also from what I understand my CT clamp might be in on the wrong cable and/or facing the wrong direction. Notice the reading of -194watts. Funny thing is that during loadshedding the numbers are correct but when there is grid power the numbers dont make sense. Here we had loadshedding between 12h00 and 02h00: This is how the CT clamp is connected. Any help or advice will be appreciated. Even if someone maybe has the contact number of a technician that has good knowlage of the Sunsynk systems. Many thanks, Oelof Change the white and black. White on 5 , Black on 6. Arrow on Ct should point down as it is installed now
August 14, 20232 yr Author 4 minutes ago, VirWat said: Change the white and black. White on 5 , Black on 6. Arrow on Ct should point down as it is installed now Thanks vir wat, I did swop them but did not notice any difference. Perhaps the inverter takes some time to adjust? Also on the Sunsynk forum a gentleman thats assisting me with the same issue mentioned that the CT clamp is on the wrong cable and should be on this cable?
August 14, 20232 yr There appears to be only one red wire leaving that 63A breaker, so it makes no difference whether it's connected to the input red (top) or the output red (bottom). Simply trace the wire at the bottom of the 63A and make sure that's the one that the CT coil is clamped to.
August 14, 20232 yr Author 11 minutes ago, p_i said: You need to tick priority load. That will let the system use power from solar (and not prioritise charging the battery). You also need to tick Zero export but untick limit to load. Limit to load = essentials only. You have non-essentials that you want to feed from solar, so you don't want limit to load. But first show us the 2 System Mode screens. Also go to the main screen (press Esc until you see the dials) and then click on battery and show us that too. If you see negative readings under CT, it's pointing in the wrong direction. That will give us an indication whether your CT is pointing in the right direction. I assume your main breaker is the first 63A one on the left. If so, your CT needs to be connected to the wire that leaves that breaker at the bottom. The arrow on the CT needs to point away from that breaker, ie. pointing towards the rest of your DB. Post those pictures and we'll advise further. Edit: and I've just noticed your Normal light is not on. Has the system been fully deployed or why is that light off? @p_i, This is exactly what another user said on the the sunsynk forum. I will post the settings in a few minutes, but I think were on the right track now. Thanks for all the help.
August 14, 20232 yr Author 2 minutes ago, p_i said: There appears to be only one red wire leaving that 63A breaker, so it makes no difference whether it's connected to the input red (top) or the output red (bottom). Simply trace the wire at the bottom of the 63A and make sure that's the one that the CT coil is clamped to. Ok will do.
August 14, 20232 yr Author 2 minutes ago, p_i said: There appears to be only one red wire leaving that 63A breaker, so it makes no difference whether it's connected to the input red (top) or the output red (bottom). Simply trace the wire at the bottom of the 63A and make sure that's the one that the CT coil is clamped to. Here is a better photo
August 14, 20232 yr 1 minute ago, p_i said: There appears to be only one red wire leaving that 63A breaker, so it makes no difference whether it's connected to the input red (top) or the output red (bottom). Simply trace the wire at the bottom of the 63A and make sure that's the one that the CT coil is clamped to. Correct. Preferably on top of the incomer breaker but should make no difference like it is now at the bottom of the breaker. Same feed.
August 14, 20232 yr Just now, VirWat said: Correct. Preferably on top of the incomer breaker but should make no difference like it is now at the bottom of the breaker. Same feed. Yes, but it might be difficult to get the CT coil around the top wire unless it's out in the clear somewhere slightly further away. There doesn't appear to be any space in that photo. 😀
August 14, 20232 yr Still say. Just change the CT direction where it is installed now. Arrow should point down. Iow. The white /black wires should be at the bottom
August 14, 20232 yr Author 2 minutes ago, VirWat said: Still say. Just change the CT direction where it is installed now. Arrow should point down. Iow. The white /black wires should be at the bottom Ok no problem. I am no electrician, so I will have to turn off all the mains first. I will probably only be able to do that tomorrow though. Should I still swop the black and white on the inverter as well?
August 14, 20232 yr Just now, Oelof said: Ok no problem. I am no electrician, so I will have to turn off all the mains first. I will probably only be able to do that tomorrow though. Should I still swop the black and white on the inverter as well? You should either swap the direction of the CT coil or simply swap the wires. The net effect is the same as long as you don't do both actions!
August 14, 20232 yr Author 4 minutes ago, p_i said: You should either swap the direction of the CT coil or simply swap the wires. The net effect is the same as long as you don't do both actions! Ok, I will swop the wires on the Inverter. This is much easier. Let me do that and take some pictures of my settings. I will revert shortly.
August 14, 20232 yr Just now, Oelof said: Ok, I will swop the wires on the Inverter. This is much easier. Let me do that and take some pictures of my settings. I will revert shortly. Before you swap wires first post the photos. That will give us confirmation as to whether you need to swap wires.
August 14, 20232 yr 9 minutes ago, Oelof said: Ok no problem. I am no electrician, so I will have to turn off all the mains first. I will probably only be able to do that tomorrow though. Should I still swop the black and white on the inverter as well? Just a remark. It seems strange to see such a thick wire on the 30A MCB to the right of you main switch yet the 63A MCB has a thinner red wire connected. You have been given great advice so far.
August 14, 20232 yr 15 minutes ago, Oelof said: Ok no problem. I am no electrician, so I will have to turn off all the mains first. I will probably only be able to do that tomorrow though. Should I still swop the black and white on the inverter as well? YES!
August 14, 20232 yr 7 minutes ago, Scorp007 said: Just a remark. It seems strange to see such a thick wire on the 30A MCB to the right of you main switch yet the 63A MCB has a thinner red wire connected. You have been given great advice so far. Both seems to be 10 Sq to me. May be wrong!
August 14, 20232 yr 36 minutes ago, p_i said: You need to tick priority load. That will let the system use power from solar (and not prioritise charging the battery). Sorry for butting in here. What you say makes sense; however my SS inverter setting is priority battery and when I have PV available, the house loads get fed first, and any surplus PV charges the batteries, not vice versa with battery first etc. This is obviously the way I want it. In similar scenario, if I’m already at my preset minimum SOC, with grid present, then PV goes to house loads first, but if there’s insufficient PV it draws the shortfall from the grid. No battery recharge prioritization over load/house ever. Does this make sense? In terms of limiting grid usage per the OP, the two most critical things for me were to shift loads to a little later in day and try to stagger (and have a sufficiently low SOC setting for daytime to accommodate the swings of power usage), and having the „limit to house“ setting permanently enabled (with a bit of battery SOC setting intervention) so that non-essentials benefit from the sun during the day. All assuming CT coil etc are correct obviously.
August 14, 20232 yr Author 5 minutes ago, p_i said: You should either swap the direction of the CT coil or simply swap the wires. The net effect is the same as long as you don't do both actions! Ok, I've swopped the black and white on the inverter. Its still giving a - reading though. Here are the settings as requested:
August 14, 20232 yr 1 hour ago, p_i said: Also go to the main screen (press Esc until you see the dials) and then click on battery and show us that too. If you see negative readings under CT, it's pointing in the wrong direction. You missed the photo for this one.
August 14, 20232 yr I think we must first sort out the "Normal" LED that is not on. Never mind the - Ct coil wattage.
August 14, 20232 yr Author 2 minutes ago, Virwat said: Any Essential/ non Essential DB installed? Photos please. Only the stove and Geyser is not directly on the inverter
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