NicolasM

Hi, It could be 2 settings on the Sunsynk as well. 1. Do you restrict the current that the CT Coil has to draw from the grid, I.e. "grid trickle feed"? 2. Do you restrict usage to "limit to load only"? These settings makes a difference on the displays. With "limit to load only" active, it will not show what non-essentials are drawing from grid. I attach pics from the settings page and the displays on my 8kw Sunsynk. Also, I have read that the CT Coil connection to the inverter is equally important. If you are on single phase, I think one then connects to slot 3 and 5? Perhaps a member ccan just confirm that. Its been a long time since I had issues with the CT Coil but in my case the twisted pair cabling mention above solved my issue.

Dear All, The plant consists of: Sunsynk Hybrid single phase 8KW (Charge Amps 80 - but max is 100), Discharge Amps set at max 4KW +- 80 Amps?) JA solar 4 x Hubble AM2 Switch Gear I have tried reading as much as I can, watched Forum recommended videos and tables, but, I remain confused. One battery OEM says this way, the other if it is done that way then your warranty is void, and so forth. I have to redo the layout of the battery banks for better efficiency and space utilisation. The attached diagram shows the envisaged layout and the parallel cabling methodology. May I PLEASE have your thoughts, advice, and recommendations on the proposed layout, cable lengths, and cable thickness. I would certainly be forever gratefull !! Kind Regards, Nico Battery Cabling - Oct 2022.docx

@system32 Good Morning from a wet and rainy Pretoria! In foolowing up on this post of yours, and in light of the firmware upgrade done to 8kw Sunsynk, I thought to search for a new manual to see how the various new layouts are now described. I found a new Manual on Sunsynk.org dated November 2021. In going through the manual I looked up the Hubble AM2 in the Battery setup section and noticed that they now have a new protocol for the Hubbles. It is now 0 0 as aposed to just 0 as it was in the past. The question is: should we change the protocol setting to 0 0, or, just leave it as 0? Maybe this was a typo, but then I am sure Sunsynk does QA on things like manuals before they publish... Is there a means to find out from Sunsynk if this is a new protocol added, or, is this a typo.... Screenshot attached. Take Care! N

Hi, Because you asked the question about which version firmware was installed, I tried to find info but only found info for the 5kw, not the 8kw. So I am not sure my version is the latest, although I would presume it would be. Maybe you can guide me as to the version I now have installed. As I said earlier, I would much rather the inverter talks to the AM-2 BMS directly, then going via the RIOT. Afterall, the RIOT is there to enable remote monitoring. The reason for asking about my version of firmware is because you mentioned "recent versions" .So before I move CAN from RIOT to Inverter, I want to be sure it will work correctly. Thanks for all your time afforded me. Much appreciated. N

Hi There, They installed COMM:e41c-MCU:6006. I was on COMM:e418 - MCU: 3878. I am still digesting your response to the RIOT. Thank you, it is very detailed. From the visits to the Hubble web pages and looking at the AM2 brochure, even Hubble seems to be confused about what the settings should be. The WEB (as per your pics) shows the charge etc voltages all at 53.6, whereas the AM2 manual shows different values. Allow me one more question. Could I just unplug the CAN cable from the Riot, wait until the LiBMS throws all the errors, then plug it into Master 1 Batt, and then check the LiBMS for comms? Or, is there a recommended way of moving the CAN back to Master P1? I also take it, one does not do this during a charge cycle, or, does it not matter when it is done? That was more than one question.... Thanks for the comments and guidance. Slowly learning how to "manage" the plant. Take Care N

@system32Do you use a RIOT with your 4 AM-2's? Thanks for the suggestion to do a firmware upgrade. It was done on Saturday, and as mentioned earlier, the instability is gone. Whether or not it had something to do with the upgrade, I can only guess, but suspect the inverter may just have need a reboot especially as the CT-Coil was done after the initial install, and then again to replace the cabling on the CT-Coil with flexed insulated cable. The reason for asking about the RIOT is that I use one and as far as I am concerned the RIOT now becomes the BMS and feeds the inverter. Hubble also did a SW upgrade on the Riot (the new Beta version) but now I think they are throttling the charge rate. The batteries never reach 53.6 ...at best 53.27V. Now I am not complaining as it is sufficient to carry all the load at night. It is when we have loadshedding in the 0600 - 0900 slot that I have to be very careful with usage, on a cloudy day. On full sunshine it does not impact as the PV delivers 8KW. Any experience with the RIOT? It just that its yet another element in the bigger picture and I shouldn't have to use it. It was given to me by Hubble as I constantly had a 0x0C 0x00 and 0x0C 0x0C alarms reported by the LiBMS on Sunsynk before the RIOT...now with the RIOT the LiBMS is all ok. So it will be interesting to know if you use the RIOT or do you connect directly via CAN or RS485...or both? Take Care

I agree - I have learnt from this forum so much more that what the manual has to offer, and I am convinced that we could all benefit from such an experience. We just have to find a way to publish discussion items for the benefit of those that cannot attend. Maybe we start of by sending in questions or topics for discussion? I just know where there is a will there is a way....

@YellowTapemeasure I cant agree more. Installers do their best to leave you with a setup that will work under most conditions. They most certainly do not have the time to spend on tweaking systems. However, who are the people that will recommend Sunsynk, or Hubble, or JA, if end users are not very happy with their systems. As much as installers need to be able to diagnose issues, what we as end users do to our settings, may have serious repercussions down the line. I honestly feel that more attention should be given to end-users allowing us to fine-tune our systems but with complete understanding of what is correct, and what not to do. But where and to whom should such a request go ...? @system32 and other power users.

Hi Guys, I have been quiet the last couple of days, as I was testing a number of permutations. Because of the cloudy weather we had, on Friday eve I reverted back to my original settings because I need full SoC to see me through the night. Following suggestions from a number of people above, I followed @system32 's advise and requested an software/firmware upgrade. This was done on Saturday morning. Apart from a brief no supply, this was done seamlessly and I must say, very professionally. I have since been monitoring and I can report back that my Trickle Charge (previously Zero Export Power) is as stable as one would want it!!! So clearly the CT Coil is doing its job. Perhaps the inverter needed a reboot...not that I know how to do it - maybe a future discussion of how to reboot your Sunsunk Inverter would be welcomed by not only me but probably for all newbies as this is the one lesson I have learnt as my knowledge grows: dont do things that you dont understand the implications of!!!! This brings me to a point. Why cant someone, i.e. the PowerForum, or even Sunsynk SA, organise an end-user event where we could ask questions, and share our experiences. To me it is not wanting to become an installer, it is about being able to tweak my inverter or even my plant, to provide me with the best possible return on investment! When I read everyone's comments, the common thread is clearly that we all have our own understanding of how to do things. This means there is a major gap between what the manual says, and what end-users have been able to figure out for themselves and apply to their plants. Who exactly needs to take the lead with creating an end-user conference, or whatever it is called, I do not know, but I am sure we would all welcome such an event. Please let me have your thoughts guys and feel free to comment in case I am missing the boat. Take Care and to each and everyone that commented - THANK YOU!!!!

Oops and to system32 for pointing me in the right direction: greatly appreciated !!!!

Hi, Just some feedback on the firmware upgrade: It was done over the weekend and the best part is, I had to do nothing. It was done over the air, and rebooted itself, and that was that, upgraded to the latest firmware or software version!!! Apart for a brief 5 minute electricity outage, everything worked first time. All my settings where maintained, and even the issue I had with the Sunsynk inverter's inability to maintain Zero Export Power to my setting, has gone away. I am back to using less than 2kwh per day. This was a very professional manner to do the upgrade which was initiated by my Installer: Nolan Roebuck of Romik Engineering. Sunsynk did this upgrade seamlessly. I guess I would not have known about the brief electricity supply outage, had I not been monitoring at that moment. My appreciation and thanks to the guys from Sunsynk and to Nolan Roebuck!!! Nico

Hi, I am also new to this environment and experiencing the same symptoms. See my post "Sunsynk 8kw - ability to maintain zero export power". I received comments and suggestions, and, maybe you can find your answer there. BTW, I am still running on the previous version of the firmware so it may not be the upgrade you did that causes this. Although no one has suggested it, I somehow feel that it could have something to do with the CT coil. Perhaps they stop working properly....although at night and early morning, it does what it is intended to do, in my case, it happens on low load and after it was working hard, i.e. delivering 6-7KW of power from PV for 4-5 hours (charging geysers, pool pump, charging battery, etc). Hope this help. I which somehow we could get a Sunsynk response..... Take Care

Hi All, I am totally new to solar and everything and I am a end user. From my earlier post regarding my issue with the Sunsynk's inability to maintain Trickle feed (Zero Export Power), I have seen replies thereto (and elsewhere on the Forum) suggesting I should do a firmware upgrade. My question is: How does one do a firmware update? What is involved, what are the tips and tricks, and, is there a guide somewhere on how to do this? Is it something that an end user can do? Your comments and guidance will be greatly appreciated!! Take Care All

To YellowTapemeasure: Thanks for the insights and guidance. I will certainly try your suggestions wrt dropping the SoC. BTW, are you using Hubble's? To all who have replied - Thank You. The more we share the better our plants will deliver what we intended it to do!! Mine is to use no grid and for that reason I invested serious money in the plant as did you all. My question is: How long does the inverter take to adjust the pv, and, does it ever stabilise, if the load remains constant? If it does, then mine does not. I use > 3kwh per day - my day day being 0800 to 1700 where 3 weeks ago I was using less then 1.5kwh for a 23 hour day, as measured by Solarman at 11pm. I have made no changes that could have brought about the change and erratic behaviour. I also want to be clear, I am talking about a clear sunshine day with 0% cloud cover when I have a max of 9.6KW available in PV......It seems as if the inverter just cannot maintain the pv and constantly uses the grid. the dial's just dont stop moving up and down. This is more evident at low load.... Thanks for the replies and guidance offered.