viper Posted August 15, 2022 Share Posted August 15, 2022 Hi, I recently installed a solar system, with a 5kw Sunsynk Inverter. If I export the solar power to my non-essential loads then the non-essential load and PV power in the app always displays the total power of the panels that are generated. Is that correct? I thought it must show the power that the non-essentials are using and then if they are not using any power then it will display everything as exported to the grid. In the attached picture there was no non-essential load at that time, but all the power generated was exported to the non-essential load. This is what the app shows. All the generated power show up as load. Quote Link to comment Share on other sites More sharing options...
mzezman Posted August 15, 2022 Share Posted August 15, 2022 From the image your essentials (UPS-icon) are using 194w while non-essentials (house-icon) are using 1281w. 48w are being exported to the grid. Batteries are 100% charged. Can you share your work mode 1 and 2 screens as well? Quote Link to comment Share on other sites More sharing options...
viper Posted August 15, 2022 Author Share Posted August 15, 2022 Thanks, I will share the screens when I get home. At that time though none of the non essentials were on. That's the issue that all the power generated by the panels always displays as non-essential load, and always between 48w-51w exported to the grid. Quote Link to comment Share on other sites More sharing options...
mzezman Posted August 15, 2022 Share Posted August 15, 2022 ok - with the additional screens we can make a more informed answer. perhaps what you could also try and show the flow chart with and without non-essentials running Quote Link to comment Share on other sites More sharing options...
viper Posted August 16, 2022 Author Share Posted August 16, 2022 Here are the screens: There was no non-essential loads that were on, but it still showed 324w load. Quote Link to comment Share on other sites More sharing options...
P1000 Posted August 16, 2022 Share Posted August 16, 2022 Either there is a problem with your CT installation, or you actually have non-essential load. Can you switch off all non-essential loads at your DB? Quote Link to comment Share on other sites More sharing options...
viper Posted August 16, 2022 Author Share Posted August 16, 2022 All the non-essential loads was switched off at the db when I took the photos. Quote Link to comment Share on other sites More sharing options...
BryanOC6 Posted August 21, 2022 Share Posted August 21, 2022 On 2022/08/16 at 8:20 AM, viper said: Here are the screens: There was no non-essential loads that were on, but it still showed 324w load. Any reason why you are not running your batteries to assist with the load during the daytime at least? why don’t you use solar PV to charge the batteries? With all those grid ticks you are using Eskom to charge the battery up Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted August 21, 2022 Share Posted August 21, 2022 Why is there always 280W (missing) if one adds up what comes in from PV and you add up the battery charging + essential, non-essential + what is exported? Normally the inverter only uses about 70W. Quote Link to comment Share on other sites More sharing options...
PsyWulf Posted August 21, 2022 Share Posted August 21, 2022 1 hour ago, Scorp007 said: Why is there always 280W (missing) if one adds up what comes in from PV and you add up the battery charging + essential, non-essential + what is exported? Normally the inverter only uses about 70W. Lower PF than 1? Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted August 21, 2022 Share Posted August 21, 2022 (edited) 7 minutes ago, PsyWulf said: Lower PF than 1? Losing 280W from the total PV of 802W is nearly impossible due to the PF=0.65 unless no resistive load is connected and load is only motors. Edited August 21, 2022 by Scorp007 Quote Link to comment Share on other sites More sharing options...
viper Posted August 22, 2022 Author Share Posted August 22, 2022 14 hours ago, Scorp007 said: Why is there always 280W (missing) if one adds up what comes in from PV and you add up the battery charging + essential, non-essential + what is exported? Normally the inverter only uses about 70W. I have no idea unfortunately. Quote Link to comment Share on other sites More sharing options...
viper Posted August 22, 2022 Author Share Posted August 22, 2022 20 hours ago, BryanOC6 said: Any reason why you are not running your batteries to assist with the load during the daytime at least? why don’t you use solar PV to charge the batteries? With all those grid ticks you are using Eskom to charge the battery up The "use timer" tick is off, so I thought it's not using the schedule, but I am still trying to figure out why all the power generated by the panels show as load on the non essential side. Quote Link to comment Share on other sites More sharing options...
Coulomb Posted August 22, 2022 Share Posted August 22, 2022 23 hours ago, Scorp007 said: Why is there always 280W (missing) if ... Normally the inverter only uses about 70W. There isn't just the self consumption; there is also the power loss in the IGBTs which is roughly proportional to the output current, and hence the apparent power of the load. This is typically about 7%, that would imply an output of some 210 VA / 7% = 3 kVA. That seems plausible. Do you find a lower discrepancy at lower output loads? Also, are you possibly calculating PV power using battery-side current times PV voltage? Axpert inverters report PV current at the battery side of the Solar Charge Controller. However, they always seem to report PV power correctly. PsyWulf 1 Quote Link to comment Share on other sites More sharing options...
Scorp007 Posted August 22, 2022 Share Posted August 22, 2022 3 hours ago, Coulomb said: This is typically about 7%, that would imply an output of some 210 VA / 7% = 3 kVA. That seems plausible. Do you find a lower discrepancy at lower output loads? Also, are you possibly calculating PV power using battery-side current times PV voltage? Axpert inverters report PV current at the battery side of the Solar Charge Controller. However, they always seem to report PV power correctly. As this is only my input based on the Watt readings from the Sunsynk. Thus no confusion around using the way a Axpert would provide specs or values. Reading the values of other Sunsynk inverters this 280W difference is not present. This could be the area to look at in solving a possible problem. I do think the inverter will not show a load on the non essential side if there is no such a load. This if the CT is positioned correctly. Quote Link to comment Share on other sites More sharing options...
BryanOC6 Posted September 3, 2022 Share Posted September 3, 2022 Hey Viper, did you come right here? Quote Link to comment Share on other sites More sharing options...
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