JuliusK

I also stumbled upon them, thanks for mentioning them.

Thanks for sharing that, it's good to know that the support can be counted on. Definitely leaning towards them.

That's good to know, appreciate the info.

Afternoon all, Could anyone recommend any trust worthy 3rd party companies that are able to repair Pylontech batteries that are no longer in warranty. I would need someone to look at my 4 batteries and tell me if they are salvageable, perhaps build 2 out of 4? Thanks,

What a BMS should do and what a BMS actually does or what a inverter listens to is a mystery to me. So like you I understood the BMS to be the mechanism by which the inverter is controlled that then charges or discharges the batteries to the appropriate level. So if something is outside a set of parameters the BMS should prevent the batteries being damaged. But for what ever reason they do not seem to be doing their intended task. As in my scenario my batteries were being over charged, the Sunsynk inverter charge settings were only ever to be used if the bms was not available. There were 16k over charge logged error on the batteries yet the batteries continued to work, they never went into protected mode not once.

Thank you, I will add BSL to my list of companies to investigate. I've never actually heard of them before.

Morning all, So after my last 4 Pylontech us3000c were a complete write off, I am now going to be shopping around for a new battery system. This time around, support, support, support is going to be key focus. So at the moment I have two possible brands lined up as possible replacements, I'm only going to start with one 5kwh battery at the moment as this year has already been very expensive. Freedom Won eTwower 5kwh - manufactured in South Africa, the company has been around for a long time, they have a lot of installs. Greenrich UP5000 - manufactured in South Africa, it's a relatively new company, they seem to be popular because of their price point. I would really appreciate any feedback on Freedom Won and Greenrich batteries plus any other batteries anyone can recommend that they have been running for 7+ years? What I'm really after is good local support and batteries that are up to the task to be used daily (at night mostly) so I can carry over my solar production into the evenings. Thank you,

A bit more of a complete answer. I had Segen support connect to the batteries remotely and pull the logs via Battery View, they state because of the over voltage errors and that the batteries have swollen the OEM (Pylontech) will not honor the warranty. My argument was that there were no visible error presented to me at any point in the last 5 years so that I could correct anything. The batteries never went into safe mode, there were no errors logged on the Sunsynk inverter. They stated that because of one setting that was disabled in the Sunsynk inverter that is why no error were ever logged, the settings in question is "BMS_Err_Stop - When it is active, if the battery BMS failed to communicate with inverter, the inverter will stop working and report fault." Every time I looked at my inverter and it was often, the BMS was working correctly all info was being displayed in the Sunsynk LiBMS screen. Segen's Support then states that the error were transient and because the BMS_Err_Stop was not enabled, the BMS communication issue would clear it's self and I would not see it on the panel. Even though Pylontech battery BMS does have over voltage protection and over charge protection built in? So essentially 4 Pylontech us3000c batteries down the drain.

The battery in question has swollen and Segen / Pylontech are refusing the warranty. Seems like 3/4 batteries have swollen, even though there is communication between the inverter and the batteries. I'm at a loss for words.

Thanks for the suggestion, I'm going to get him to test the voltage. I'll check the batteries for older log files too.

The installer is coordinating all of this for me with the supplier. If they throw this out, then what's my options? If the inverter doesn't listen to the libms, go to Sunsynk?

Morning, I'm waiting for response from Segen after I submitted my rma paperwork with all the log files from the batteries. Have you used Solar Diety for any pylontech work? They claim to be the authorised pylontech repair center for South Africa?

That's correct, it was due to the wrong firmware being installed by the manufacturer during an upgrade. Something is not right since the battery is asking something and not getting it.

Most of my batteries are in a high voltage state or an OV state. Is there anything that I can do to reduce that or it's a bms thing?

SA has two USB cables, one that goes to the inverter and a second that goes to the console port of the master battery. However I do not know which data is being plotted on the graph, the average of all 4 batteries or the inverter values. The additional USB to the batteries does give the ability to see the individual batteries SOC, voltages etc. I'm going to get the installer involved tomorrow.