Twakdaddy Posted February 16, 2020 Share Posted February 16, 2020 Hi Everyone, I'm new to the forum, I sincerely hope there are a few bright sparks who can help me out? My setup: Inverter: 5KW Axpert King (ERS King 5K, Firmware 71.80) See attached data label Battery: 2 x 3.5KW Pylontechs PV's: 12 x Jinko 315W, 35Vdc (4 x stings of 3 panels delivering 105Vdc) Monitoring: ICC PIE I want to run the system in SUB mode so that I can use all the energy the panels produce in my load and if it falls short I want to blend from the utility. I want to keep my batteries full and ready for power outages and load shedding only. All my research and conversations with others led me to believe that the King could do this but I am starting to doubt this. When I run in SBU mode the inverter takes all the energy the PV arrays provide and draws basically zero from the grid. The graph is smooth and the PV's carry all the load. If clouds come over the battery will kick in and supplement the load. See below, the second half of the graph. When I switch to SUB I expect a similar operation except the utility to kick in if the PV's fall short. This however does not happen, the inverter seems to loose its head a bit. Is seems as though the load is covered by utility and the PV's and batteries also seem to come to the party at erratic intervals?? See below pic? In the previous picture you can see the oscillations at the beginning of the graph prior to switching to SBU mode. Note how energy is drawn from the utility, battery and solar panels at the same time? Not sure what is doing with it all but clearly something is wrong? I have thoroughly checked the wiring and all PV strings are balanced and delivering the right voltage and there is more than enough PV power to carry the load. The below image clearly shows the oscillations in question. Please note at the time this picture was taken that 3.5KW of PV power was ready in full sunshine. Here are the inverter settings. If anyone can shed light on the problem I will be most grateful as I have trawled the internet and come up with very little? Thanx guys Quote Link to comment Share on other sites More sharing options...
Conley Annandale Posted February 17, 2020 Share Posted February 17, 2020 i have a similar set up, I went to settings on th pie and from 08h00 to 16h00 I set is on Sbu for the rest I have set it om Sub, and it seems to work fine, here in Secunda we had outages from 4 to 28 hrs and my system has not let me down, you can call me 0836578797. Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 I've found my king only seems to work correctly on SUB when Charge source priority is set to Solar only. Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 17, 2020 Author Share Posted February 17, 2020 @ Conley, Thanx for your input, much appreciated! Could I perhaps ask if you could send me your inverter settings so I can compare them to mine? Another thing, my inverter works perfectly in SBU mode but not in SUB? WOuld you perhaps be willing to switch your inverter to SUB mode during the sunshine and send me a picture of your graph for say a 10 min period? Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 17, 2020 Author Share Posted February 17, 2020 @RichieRich Thx for the feedback. I have tried this setting but my woes continue. Can you perhaps share your inverter settings with me? If you running ICC could you share a picture of your graphs? See oscillations on my inverter when SUB mode is on Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 37 minutes ago, Twakdaddy said: @RichieRich Thx for the feedback. I have tried this setting but my woes continue. Can you perhaps share your inverter settings with me? If you running ICC could you share a picture of your graphs? See oscillations on my inverter when SUB mode is on These are my current settings. One thing I have noticed is if I put my inverter into SUB it doesn’t always work as it should however if I set it to eco mode first, then to SUB it behaves better. ive set mine to sub now and will post a graph a bit later once my solar has dropped off a bit. Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 Here is my graph from when i changed the setting to SUB. you can see some solar drops from around 16:17 to 16:45. These where due to clouds. Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 17, 2020 Author Share Posted February 17, 2020 @RichieRich Wow, that is what I'm after, this sure gives me hope!! You can see towards the end of the day, your grid graph is inversely proportional to your solar grid which makes sense. I don't want to waste your time but need to replicate what you have! Can you tell me: 1) what your Firmware version is? 2) Can you give me your exact settings? Mine are as follows: 01 SUB 02 10 05 USE 06 LtE 07 Ltd 09 50 10 OnL 11 30 12 48 13 53 16 SbL UdC 18 bOF 19 ESP 20 LOF 22 AON 23 bYE 25 Fd5 26 53.2 27 52.2 28 SIG 29 47 30 AUt 33 Ed5 34 58.4 35 60 36 120 37 30d 39 Ad5 Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 Just having a look at your grid watts , load watts and PV watts. Looking at that information it looks as if the load is being powered by solar power. Could be an error with your version of ICC ? 370 watts has to be going somewhere . Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 17, 2020 Author Share Posted February 17, 2020 I'm running 2.8.5 which it says is the latest? Which version are you running? Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 3 minutes ago, Twakdaddy said: I'm running 2.8.5 which it says is the latest? Which version are you running? I’m running 2.996 Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 17, 2020 Author Share Posted February 17, 2020 Hmm. Ill get hold of Johan tomorrow and get that updated first. By the way if you get a gap and can check my settings as opposed to yours I would be most grateful! Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 17, 2020 Share Posted February 17, 2020 20 minutes ago, Twakdaddy said: By the way if you get a gap and can check my settings as opposed to yours I would be most grateful! Ill be able to check in the tomorrow morning. Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 18, 2020 Share Posted February 18, 2020 1) what your Firmware version is? = 71.86 2) Mine are as follows: 01 SUB 02 10 05 USE 06 LtE 07 LtE 09 50 10 AUT 11 10 12 47 13 50 16 SLb UdC 18 bOF 19 tEP 20 LOF 22 AOF 23 bYE 25 Fd5 26 53.2 27 53.2 28 SIG 29 47 30 AUt 33 Ed5 34 58.4 35 60 36 120 37 30d 39 Ad5 Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 18, 2020 Author Share Posted February 18, 2020 Thanx mate, do you perhaps know where I can download the 71.86 FW version? Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 18, 2020 Share Posted February 18, 2020 Yes from the download section here on the forum. Twakdaddy 1 Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 18, 2020 Author Share Posted February 18, 2020 Good news! I have inserted all your parameters into my inverter and its looking way better! I'm not surer which setting has cured it, will need to investigate. Thx a stack for your help Richie, most grateful. Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 18, 2020 Author Share Posted February 18, 2020 Hi, It seems I jumped the gun a bit! Once my battery was fully charged the inverter started oscillating again. I'll update the firmware and see if it gets better...:-( Quote Link to comment Share on other sites More sharing options...
RichieRich Posted February 18, 2020 Share Posted February 18, 2020 This afternoon I ran my king in SUB and I also had oscillations in my PV current when my batteries where fully charged. This only seems to happen when the PV current is greater than the load current. As soon as the PV current drops below the load current it all smoothed out. Its overcast and a bit rainy here today so my solar production is not great nor stable. However it did notice earlier in the day that when the load was above 1000w there was no oscillation. But I could only observe this for short time. Hopefully tomorrow’s weather will be better and I’ll be able to test. Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted February 26, 2020 Author Share Posted February 26, 2020 @RichieRich, thx for the feedback.I have upgraded my inverter firmware to 71.86 and been fiddling with the settings. I seem to have similar experiences however mine oscillations seems seem more extreme. In SBU and sunshine it runs perfectly, tacking little battery when required then jumping back to PV. Its a shame it cannot work like that from Utillity? Quote Link to comment Share on other sites More sharing options...
iveky3 Posted June 8, 2022 Share Posted June 8, 2022 twakdaddy, have you solved your problems? Quote Link to comment Share on other sites More sharing options...
Etiennet Posted June 9, 2022 Share Posted June 9, 2022 On 2020/02/26 at 11:30 AM, Twakdaddy said: @RichieRich, thx for the feedback.I have upgraded my inverter firmware to 71.86 and been fiddling with the settings. I seem to have similar experiences however mine oscillations seems seem more extreme. In SBU and sunshine it runs perfectly, tacking little battery when required then jumping back to PV. Its a shame it cannot work like that from Utillity? 12 hours ago, iveky3 said: twakdaddy, have you solved your problems? I am also interested to know if it is solved. Quote Link to comment Share on other sites More sharing options...
Ben Harper Posted June 9, 2022 Share Posted June 9, 2022 @Twakdaddy, is your inverter connected to your battery with a comms cable? Quote Link to comment Share on other sites More sharing options...
Twakdaddy Posted June 9, 2022 Author Share Posted June 9, 2022 Good day to all. Sorry for late reply. Yes it is sorted. I switched over to ICC's software. I was on the Centurion Solar software and once on ICC all was sorted. Manie was most helpful. Quote Link to comment Share on other sites More sharing options...
Etiennet Posted June 9, 2022 Share Posted June 9, 2022 7 minutes ago, Twakdaddy said: Good day to all. Sorry for late reply. Yes it is sorted. I switched over to ICC's software. I was on the Centurion Solar software and once on ICC all was sorted. Manie was most helpful. Maybe you could share your settings for others to see in case they have a similar issue? Quote Link to comment Share on other sites More sharing options...
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