Wilfred

I really hope it resolves your issue, was strange that the batteries charged in bypass mode but not when the inverter was on and in USB mode. Really hope your issue is resolved :). Was an absolute pleasure meeting/speaking with you over the phone.

Currently that picture show that the grid is available and it is running off the battery check pm

The Narada is similar to the Huawei you had. Was your settings changed or reset to factory defaults with the change of batteries? I know those batteries can hover on 48.5V for hours on end. My setup for the Huawei’s was as follow: 02 SBU 05 USE 12 47V 13 52V 16 SbL/UCb (they did not like SLb) 26 53,5V 27 53,2V 29 44,5V (only to not listen to the alarm, as it went to grid at 47V) What happens if you set it to USB now, is it charging the battery? Also, those UPS’ you have for backup, it is draining your battery.

That should be fine as it states that the flow is from solar to battery to load and utility may charge battery. therefore @Dex_ is correct, your settings was maybe set too low and battery shut down before it charge from grid

I found that when charging from grid it is limited to 11’s setting, when charging from PV it will use 02, if 02 is smaller than 11 inverter will use 02 for utility, 02 is usually the higher of the 2 settings. I have a feeling that setting 16 is set to not charge from utility and therefore when it change over or suppose to change over to grid the batteries die and kill the system. Also, as soon as you have this resolved, get rid of the UPS’ you have as they are killing your battery.

What is setting/program 16 settings now?

That mean that the utility will charge at a rate of 30 amps (you can change that to 20A). The other thing to consider is another setting which could prevent the inverter from charging the batteries from grid/utility. Check program 16. I am not sure if it will totally prevent the inverter from using the grid as you are set to SBU. Most, if not all inverters need the battery to operate, therefore if your inverter is set to not use the grid to charge the battery you might be in a situation where your battery is turned off and then the inverter don’t work or also turn off. Come to think of it, I think setting 16 is set to not charge from the grid, this might be your problem.

I would set 29 to 2.5V below back to grid. The alarm will start to annoy you at 2V above that setting (ie set to 46V and alarm will start at 48V), It should go back to grid at 48V and should only start to bother you if it go below for example 47.5V if set to 45.5V (cut-off) (45.5V + 2V = 47.5V where you have set back to grid to 48V). The BMS should shut down at a safe level if it go beyond that point anyway. The inverter will also use the cut-off voltage as a closer to 0% reading of battery SOC if you do not have a proper battery monitoring system. Don't set the cut-off too low, if settings 12 and 13 are correct then their should not be any problems.

What is program 11 set to?

One of these? FCS-Narada-Li-Ion-48NPFC100-Battery-pack.pdf 48NPFC10023-inch.pdf

For some reason it switched to grid at 00:05 out of the blue, need to go investigate.

Hi guys, Sorry if this is posted in the wrong spot, I was looking for some place where this would be most suitable. Just some questions out of curiosity and maybe someone can relate or have similar issues, questions, answers or data relating to this. 1. What is the difference in setting program 16? I have my inverters setup to SLb, meaning that solar energy provide power to the load first (UCb - allow the utility to charge batteries). So far we had sunny days and there were never any problems going into 16:30 to 17:00 with full batteries. Had efficiency of around 4.5. Unfortunately we had clouds on Friday, Saturday and Sunday, which had the batteries not fully charged going into late afternoon/night time. Efficiency dropped to between 2.5 - 2.9. (Today was 3.8 and batteries were fully charged and are currently (midnight) at 55% drawing around 800w per hour). I also try to have all of the heavy loads be done at around 14:00 in the afternoons. Only one thing I have 0 control over however remains. 1.1 The inverters switched to grid on different days at different times depending on SOC at around 22%. Problem is, one day it went back to battery at 50% SOC and other days it went back to battery when the PV produced enough to supply the load (it charged well over 4 hours on grid power). Charging of the batteries went a bit slow as well for the said days from PV. 2. Will it help to change over to SbL so that solar energy charges batteries first (and allow utility to charge). I have already changed to this setting tonight and will monitor it for the coming week or two, but I doubt if we will have the same weather conditions as last week. 3. Do point 2 above have a negative effect on battery cycles as my current setting showed a cycle each day which is understandable and acceptable. 4. Is there a downside to have different settings on each inverter, let’s say one inverter is set to supply loads first and the other is set to charge batteries first? ie one is set at SLb and the other at SbL? 5. Is it better to switch to SUB in such days so that the batteries can be charged. We all know that load-shedding is around the corner. 6. What will the difference be in setting program 11 to 20A per inverter rather than 10A per inverter? Changed program 02 from 50A per inverter to 40A per inverter as I saw the batteries showing slightly more than 100A which also do not show on the graphs with the silver line effect. Work from home so most days I can be here to see how things run, sometimes I am at clients and can’t control certain factors. Did however installed Emoncms on my wife’s phone so that she can at least see the SOC and if the grid is there or not so that she can actually control the one issue I still have in my household that can have a influence on the load used that are supposed to charge the batteries :). With the clouds we had poor power production but because of the silver line effect I had spikes that show peak power probably for a second or two as high or a bit higher than what is expected to be max on a PV array. Using ICC to monitor, but not to switch anything. Graphs show a slight different story than the snap shots on the gauge tab. By not being on the grid excessively I have brought down grid usage from +- 32kWh per day to the new lowest of 34kWh for the week. If the batteries did not charge so much it would have been less for the week :). Last night however the batteries including the load sucked up 17kWh from the grid, it went to grid around 1:30 and only got off at around 5:40. Using 2 PV arrays of potential 3 780 watts each (12 x 315w) 2 x 5kVa inverters (Synapse 5.0K+ / aka Axpert King) 4 x US3000 Pylontech’s (still trying to resolve the cable directly to the inverters, just need to plug in and test, have not gotten around to it). Rpi and ICC for monitoring purposes including the battery monitoring cable, no switching, only monitoring. Since changing the batteries to the Pylontech’s they have only gone to grid once in the first week since 28 October, but three times this weekend with the poor sunshine conditions.

That is from each inverter = 80A if I am not mistaken in total. Meaning each inverter push 40A into the batteries.

Thank you @Jaco de Jongh, Can that however be a contributing factor the the PV drop that people are experiencing? I will go back into my log history as far as I can, I do not currently have this PV drops. I think that I had this problem previously, but with the Huawei’s gone, no more, still need to check logs and see if the problem was actually resolved before the Huawei’s was returned.

Hi MrB, I don’t know if you can use both at the same time. i know that you have to stop (left top) the ICC, then tick all the x’s where you want them, right through, from left to right. Then save, then start ICC (left top) again. Also make sure before you save that the option is green and not black, in other words set to on.

This is a very late post to this issue. My installer doubled my cables from the combiner box on the roof to the inverters, this drastically cooled down those cables, could heating/overheating of wires contribute to this matter? Also the Huawei is not suitable in my honest opinion, especially only running two, three might resolve the issue as well. I did not experience so many dips even running two of those batteries. According to my notes my settings were: 01-SBU, 02-30 (played with this between 30 and 50A), 11-20, 12-47 (48v also worked fine), 13-54 (this was too high and I set it later down to around 52v), SbL/UCb (solar charge battery 1st, my system tripped and went totally haywire the last time I had it on Solar supply load first), 26-53.2, 27-53, 29-44.5 (the reason is that the inverter give warning and sounds at 46.5 and should be back to grid at 47v, thus no warnings/errors/noise). Also no BMS was implemented at the time.

Is this working now or not yet?

I know this is an old post, but just turn the batteries on their side and stack them like files next to each other

Ok, had a cable made and tried it today, still give error code 61, communication error. I am busy talking to the supplier of the inverters and will see if they have a solution for this matter. have a standard cross-over cable as well, just have not tried it yet. I am still running firmware 71.70 and will ask them if I can upgrade to 71.80 without loosing my warranty.

It does actually :)

Thanks a lot, did only receive the black network cable from the Pylontech guys, and 0 cable from the inverter guys, I have sent your diagram to my IT guy, he will build me a nice cable :). Thanks a lot for you guys on this forum, would have been lost without you all. Regards, Wilfred

Hi, Thanks for this valuable information. Can I assume this is why we get error 61 when we set setting 05 to PYL as the CAN/Communication cable supplied by Pylontech is cabled wrong, ie it is not crossed-over as in your pictures, the one point are the same as the other point as a normal network cable instead of a crossover cable? Thanks, Regards, Wilfred

Hi all, Have anyone resolved the error 61 yet? US3000 x4 with communication cable to one of my inverters in parallel. If setting 05 on USE, no problem, as soon as you set it to PYL (which setting was not available when other batteries was installed without comms cable), error 61. I have the whole system on the grid without any load as I am on the grid by way of a switch over. The batteries are charging from PV, been charging for almost two hours while i was searching for the error code. What is funny though is that the battery SOC is dropping in line with the PV availability or power as per PI and ICC. Just switched off the inverters so that they show that they are in "bypass" mode, the battery jumped back from 56% SOC to 67% SOC. The lights (SOC) on the batteries are steady at the 2nd to last on from full.

Hi all, I am running my pool pump 3 hours a day from 11:00 to 14:00 from my existing system. No problems so far. My pool ain’t massive, I would guess nothing more than 20k liters. 3 hours a day is a bit short, but I don’t have any problems keeping it clean, been almost a month now.