Smirresa

The solution Herman proposed definitely solved the 08 (and 04) errors/problems on the Axpert inverters. Not a single error or trip since making the changes in Dec 2020. Not familiar with the Growatt inverters I had the problem on two systems. One with 2 x 5kVA in parallel and the other with a single 5kVA unit. As far as I remember, for the dual system, the 08 error mostly occurred on the master inverter

Experiencing communication problems between an Axpert VM3 5K and the new pylontech 3000C batteries. Previously had the 3000B batteries and there were no issues. Any advice?

Sorry, loud 🙂

No idea. Apparently a load bang when they switched to the inverter supply and then it was dead. I suspect the outputs of the three inverters were not synchronized as they were all set up to run as singles. The weakest one died

Thanks for the help and advice @Coulomb. You are correct, for some or other reason the settings were reset to factory default. Lost one inverter but the other 2 now running fine with the correct settings reinstated

Working on a system with 3 x 5kVA Axperts (Mk1) in parallel. System recently developed an issue where the inverters do not display the master/slave indication. The section in the middle of the LCD where this is displayed is blank for all three inverters. Paralleling and current share cables are all connected and plugged in. Anybody seen this problem before?

@Coulomb Made some changes to the inverter voltage settings in line with your suggestions and it seems to have solved the problem. The inverter now switches on the SOC settings of the ICC. What puzzles me is that the system worked perfectly fine with the old inverter settings for almost a year (approximately 200 battery cycles logged). Is it possible for the Pylontechs' voltage profiles to change/deteriorate over time so that, after 200 cycles, the voltage at approximately 25% SOC is now lower than when installed?

@Coulomb Got an earlier version of the software and testing it now. Had an erroneous switch to grid again this morning (at about 24% SOC instead of the 20% setting). Looks like the battery voltage may have momentarily dipped below my Back to grid Voltage setting of 48V, coinciding with a increase in power draw - refer to attached graph. The graph shows a minimum of 48,5V but the switch happened at that time hence my suspicion as described above.. Any harm in reducing the back to grid voltage to 47V?

@Coulomb Originally set up the system with all the values and settings for Pylontechs as published on this forum - and it worked perfectly for a long time! I will confirm later today that all is in line with the suggestions as per FAQ #2 and will also monitor the voltages when the switching occurs. Is it possible that the battery voltages will change (after being used for a year) to such an extent that settings that used to work no longer do so? Any idea why the switch from grid to batteries is now also higher?

I have 2 x 5kVA (450 VOC) Axperts in parallel with 8 x US3000B Pylontechs and 24 x 380W PV panels, implemented with a Raspberry Pi running ICC software. System worked perfectly for about a year with switching between Grid and Battery/Solar being controlled by the ICC. Been religiously keeping my ICC software up to date and downloading a new version the moment it becomes available. I recently developed a problem where the system does not switch based on the battery SOC anymore. My ICC settings for this are 20% SOC back to grid and 50% SOC to Battery/Solar but the system seems to switch at about 34% to grid and 77% to Battery/Solar. This does not make sense to me as I was under the impression that the ICC overrules the Inverter as far as battery control is concerned. The problem only developed after I downloaded version 4.2 of the software but the supplier is adamant that the software is not the problem. Anybody else experiencing a similar problem or know where I can get an earlier version of ICC (below version 4.0)? Any advice will be appreciated

Is the Powerforum store still operational. Looking for a quote on 2 x Pylontech US3000C, 1 set of battery cables and 2 sets of brackets, delivered to Jhb

Did anyone try these batteries? Are they the Pylontechs just branded as Synapse or are they knock-offs? Looking for 2 x 3000C's

Thanks Herman Implemented this solution on two separate systems in two different parts of the country on the 1st of December, when I first saw the post. No error 08 messages on either of the systems since then, despite intermittent cloudy and wet weather. Seems like a lasting solution. If anything changes I will give feedback

Thanks @Coulomb, will try the swap first

I have 2 x 5kVA Axpert MKS II inverters in parallel with 24 x 380W panels (9120W total), 8 x Pylontech 3,5kWh batteries and a Raspberri PI with ICC installed, controlling the system. Last couple of days have been cloudy with intermittent periods of full sun and I am now periodically logging very high (20,000 - 30,000 W) outputs from my solar panels on the PI. Happens in the morning around 9 ish when the sun is breaking through the clouds. Looks to me like a measuring error somewhere as the reported values are 2 - 3 times the installed PV capacity. Anybody seen this before?

Very interested in this potential solution Herman. Are you referring to setting 11 - Maximum utility charging current to be set to 2A and setting 16 - Charge source priority to be set to CSO instead of OSO? With OSO only solar can charge batteries but with CSO, utility can also charge if there is no solar

All useful info thanks. Will do some further fault finding - suspect it will cost me a new hairdryer

@Chloe Weird thing is I also installed another system with two of the same 5kVA Axperts in parallel, this time with 24 x solar panels and 8 x Pylontechs and have not had any issues with any loads (hairdryers, kettles, lawnmower etc, etc) If a hairdryer is really such an issue one would think the supplier would let you know about this

I have an Axpert 5kVA Mk2, and 2 x 2400 Pylontechs - No solar panels. System had a couple of issues in the past - main board failure and coms issues, both repaired by the supplier. I now get an Error 55 - Over DC voltage in AC output. When I reset the unit it works again. Took this up with the local South African agent/supplier (Rectron). They spoke to the Chinese supplier and got the following response "Error 55 mean the DC component of the output voltage is over the limit. It is usually caused by half waveform load, like hair drier. We don’t recommend the customer to use this kind of load."!!?!?!? 1. How can there be a DC component in the AC output unless there is something seriously wrong with the inverter? 2. How can a hairdryer (or any load for that matter) cause a DC component in the inverter output 3. How is a hairdryer a half waveform load? Good luck telling your wife she is no longer allowed to use a hairdryer because you've installed a solar system! Anybody else experienced this problem?

Recently started experiencing the same problem, albeit not as frequently as some of the other participants (2 occasions). Went through this thread in detail and I must admit that I am still a bit confused. I have mono-crystalline panels and unlike some of the others, I experience the 08 error after extended periods of being off-grid. The most recent one occurred at 5:00 am this morning after having been off-grid for about 4 days, running on solar and batteries only. The 08 error occurred when the inverter switched to bypass. Strangely enough, during the winter months, when switching between solar/batteries and grid is a daily occurrence (around 5am every morning) this never happened. The only common issue seems to be that it was cloudy and rainy both times the 08 error occurred. But then again, it has been cloudy and rainy many other times and I did not get the error!?! Has anyone managed to find a lasting solution?

Installed an Axpert MkII 5kVA Inverter with 2 x Plylontech US2000 batteries and an ICC system - no solar panels. System is to be used as a load shedding power back-up. The batteries have never discharged (besides limited testing after installation) yet the master Pylontech keeps on giving an error - the red alarm light comes on. There is no error on the slave battery. The error disappears when turning the batteries on and off by pressing the on/off switch. If I press the SW button, nothing happens. The error then re-appears a day or so later. Battery values programmed in the inverter is as recommended on this forum. Any idea why?

Apologies if I am repeating a question asked many times before but I could not locate a previous post on the forum. I have 2 x 5kVA Axpert MKS II units in parallel with 8 x Pylontech US3000 batteries, a PV array and an ICC module. Systems works fine with the ICC managing the Pylontech batteries. However, when running from the batteries I sometimes get an error 04 - low battery voltage, on the inverter. This is confusing as the Pylontech voltage sits at 48,8 and the only Axpert setting I could possibly find that would cause this is no 29, which is set at 46 V, in line with recommendation either on this forum or from the ICC suppliers. Any reason why and is this a problem?

Glad to hear all is probably ok. Thank you very much for the advice!

I have 2 x Axpert 5kVA MkII inverters in parallel with 24 x 380W PV panels an ICC and Pylontech US3000 batteries. Started off with 4 batteries and the system ran perfectly showing SOC as "Full" fairly early each morning when the batteries were fully charged. I recently added another 4 batteries (now 8 in total). The system still runs fine and the ICC sees all 8 batteries but the SOC maxes out at 98.88%. It never shows "Full" on the ICC as per the previous set-up with only 4 batteries. When the SOC reaches this 98.88% level the ICC also indicates that the batteries are no longer charging. Any idea why this would be? Is it a problem?

Thank you gents. Much appreciated