PhillipMarx

Oh yes its fixed, it was sorted after 71.94 for me. (That is for the 5x 5kw Kings with the low voltage mppt, between me and my friends)
If I recall correctly it was the 71.92 firmware my inverters came with that had that solar freeze

Morning derek049
What Inverter and firmware do you have?
Had same issue but the latest firmware sorted it out.

Hi RiPMonster
I got mine from a wholesale suppliers, but they wont supply directly to the public.
For which inverter do you need it for?
Here is a link to another supplier and the comms board they sell.
https://shumata.com/product/kodak-comm-board-for-ogx5-48/   This is not for the Axpert King!
https://shumata.com/product/kodak-comm-board-for-og3-24-og5-48/  This is the comms board for the Axpert King. I see they are out of stock. Here is another link to the comms board that is in stock. https://shumata.com/product/kodak-comm-board-for-og-plus-series/  I think it is the right comms board as there is no pic.
https://portal.segensolar.co.za/Reseller/docs/Service manual - AXPERT KING 3KW&5KW.pdf  Here is the service manual for the Axpert King.
Let me know if you don't come right.

Page 5 
For upgrade US2000B/US3000A/Force-L series product:
Please select the correct .bin file for the upgrade, by any version of Batteryview.
For upgrade US2000C/US3000C/UP5000:
If the 8th and 9th of the product Serial Number is not ‘E2’ or ‘C3’, it can still select the
correct .bin file for the upgrade, by any version of Batteryview.
If the 8th and 9th of the product Serial Number is ‘E2’ or ‘C3’, please select the
correct .zip file for the upgrade, and require to use Batteryview V3.0.28 or higher.
*It`s suggested to always use the .zip file and Batteryview V3.0.28 for any
US2000C/US3000C/UP5000 upgrade to avoid wrong upgrade caused PCBA damage.
 
Pylontech Low Voltage Battery Mornitoring and Maintenance Tool Guidance 0228.pdf

FYI
On my email from [email protected]
"Hi Marx,   Unfortunately, the new US3000C has upgraded the hardware so the old firmware will make the BMS board break."   This was a reply on my post on other forum:
 
Pylontech-Jeff    Hi everyone!
We are very happy to announce that the new Pylontech US-C series batteries(US2000C/US3000C/UP5000) have made an evolution! To adapt to the new US-C batteries, we released the new BatteryView(3.0.28) software and new firmware upgrade method.
Now all firmware are compressed into a compressed package, the system will automatically select the most suitable firmware to upgrade your battery. At the same time, we have also made HUGE compatibility with the new upgrade method. The new BatteryView and firmware zip packs can also be used to upgrade older US-C series batteries.
The upgrade process is the same as before, the only difference is: Now you just need to “Browse” the firmware zip instead bin file before!
The download link of BatteryView 3.0.28 and new firmware zip can be referred by: New BatteryView(3.0.28) – Google Drive 17
Attention that please do not load the old firmware(.bin file) to the new batteries. Otherwise the battery BMS board will be clear the firmware and cannot be waken up.
 

I read this on an other forum and just want to share here also.
Hi everyone,
Below are the latest firmware according to my supplier.
I think Jaco above mentioned. us_c_v.7_Crc to be used for US2000c and US3000c. However my supplier told me that the v2.7 is not formally been release to public yet. So I don’t know if it works or not. My supplier updated my US2000c’s with V2.6 as below attached.
us_c_v2.6_Crc.bin (224 KB)
For US2000b plus the below is apparently the updated version. I think Jaco also provided that in the previous chat.
us2000B_Plus_V3.4_Crc.bin (201 KB)
And finally here is the firmware latest version for US3000a batteries.
us3000a_V3.4_Crc.bin (214 KB)
I was also given the latest battery view software:
BatteryView_us2000b_series_3.0.28
Unfortunately I cannot share it on this page but If anyone is interested let me know and I will put it on Dropbox or somewhere for you to pick up.
I hope this help and if I have duplicated anything I apologies.
I also would like to share my experience regarding the firmware upgrade on my 3 new US2000c’s
I just replaced my US2000b Plus batteries with US2000c as 1 of the b+ batteries had a bad cell and the other one’s SOC will not go higher than 69%. I also decided to purchase another one so I can have 4 in my stack. There were no issues from Pylontech to replace them however the b and b+ batteries have been discontinued. Hence they replaced it with US2000c…(I think they have been discontinued for a while now.)
I brought my first US2000c home and before I installed it thought I would update the firmware first. The update stopped at 80% and the battery was dead. I could not start it up again . There was no voltage on the terminals. DEAD!!!
I took it back to the supplier asked them to check it out. After a long struggle the technician could also not get it started either. He tried everything to get it started again with no luck. He ended up changing the BMS board as per instructions from Pylontech. He replaced the board with a US3000c board. There after it worked fine and he could upgrade to the latest Firmware.
Now I thought this might just be a isolated instance but it was not, I replaced the other one this morning and purchased another one. While I was there I asked the technician to also update the firmware on the 2 new ones as well. However both of them gave exactly the same issue what I picked up. Luckily this time it happened to him and not me… He ended up changing those 2 BMS boards as well.
Personally I think there might be a problem with the BMS boards on the US2000c range that I received.
The batteries also did not have the same serial numbers as the old ones. The US2000b plus batteries started with PPTBH… but the new ones I received started with H21C… Not sure if this has any relevance but 3 brand new batteries gave exactly the same issue.
Just though I would share this info with you.
I would suggest when you do buy new US2000c batteries to let your supplier update the firmware for you. Just my suggestion

I read this on an other forum and just want to share here also.
Hi everyone,
Below are the latest firmware according to my supplier.
I think Jaco above mentioned. us_c_v.7_Crc to be used for US2000c and US3000c. However my supplier told me that the v2.7 is not formally been release to public yet. So I don’t know if it works or not. My supplier updated my US2000c’s with V2.6 as below attached.
us_c_v2.6_Crc.bin (224 KB)
For US2000b plus the below is apparently the updated version. I think Jaco also provided that in the previous chat.
us2000B_Plus_V3.4_Crc.bin (201 KB)
And finally here is the firmware latest version for US3000a batteries.
us3000a_V3.4_Crc.bin (214 KB)
I was also given the latest battery view software:
BatteryView_us2000b_series_3.0.28
Unfortunately I cannot share it on this page but If anyone is interested let me know and I will put it on Dropbox or somewhere for you to pick up.
I hope this help and if I have duplicated anything I apologies.
I also would like to share my experience regarding the firmware upgrade on my 3 new US2000c’s
I just replaced my US2000b Plus batteries with US2000c as 1 of the b+ batteries had a bad cell and the other one’s SOC will not go higher than 69%. I also decided to purchase another one so I can have 4 in my stack. There were no issues from Pylontech to replace them however the b and b+ batteries have been discontinued. Hence they replaced it with US2000c…(I think they have been discontinued for a while now.)
I brought my first US2000c home and before I installed it thought I would update the firmware first. The update stopped at 80% and the battery was dead. I could not start it up again . There was no voltage on the terminals. DEAD!!!
I took it back to the supplier asked them to check it out. After a long struggle the technician could also not get it started either. He tried everything to get it started again with no luck. He ended up changing the BMS board as per instructions from Pylontech. He replaced the board with a US3000c board. There after it worked fine and he could upgrade to the latest Firmware.
Now I thought this might just be a isolated instance but it was not, I replaced the other one this morning and purchased another one. While I was there I asked the technician to also update the firmware on the 2 new ones as well. However both of them gave exactly the same issue what I picked up. Luckily this time it happened to him and not me… He ended up changing those 2 BMS boards as well.
Personally I think there might be a problem with the BMS boards on the US2000c range that I received.
The batteries also did not have the same serial numbers as the old ones. The US2000b plus batteries started with PPTBH… but the new ones I received started with H21C… Not sure if this has any relevance but 3 brand new batteries gave exactly the same issue.
Just though I would share this info with you.
I would suggest when you do buy new US2000c batteries to let your supplier update the firmware for you. Just my suggestion

I read this on an other forum and just want to share here also.
Hi everyone,
Below are the latest firmware according to my supplier.
I think Jaco above mentioned. us_c_v.7_Crc to be used for US2000c and US3000c. However my supplier told me that the v2.7 is not formally been release to public yet. So I don’t know if it works or not. My supplier updated my US2000c’s with V2.6 as below attached.
us_c_v2.6_Crc.bin (224 KB)
For US2000b plus the below is apparently the updated version. I think Jaco also provided that in the previous chat.
us2000B_Plus_V3.4_Crc.bin (201 KB)
And finally here is the firmware latest version for US3000a batteries.
us3000a_V3.4_Crc.bin (214 KB)
I was also given the latest battery view software:
BatteryView_us2000b_series_3.0.28
Unfortunately I cannot share it on this page but If anyone is interested let me know and I will put it on Dropbox or somewhere for you to pick up.
I hope this help and if I have duplicated anything I apologies.
I also would like to share my experience regarding the firmware upgrade on my 3 new US2000c’s
I just replaced my US2000b Plus batteries with US2000c as 1 of the b+ batteries had a bad cell and the other one’s SOC will not go higher than 69%. I also decided to purchase another one so I can have 4 in my stack. There were no issues from Pylontech to replace them however the b and b+ batteries have been discontinued. Hence they replaced it with US2000c…(I think they have been discontinued for a while now.)
I brought my first US2000c home and before I installed it thought I would update the firmware first. The update stopped at 80% and the battery was dead. I could not start it up again . There was no voltage on the terminals. DEAD!!!
I took it back to the supplier asked them to check it out. After a long struggle the technician could also not get it started either. He tried everything to get it started again with no luck. He ended up changing the BMS board as per instructions from Pylontech. He replaced the board with a US3000c board. There after it worked fine and he could upgrade to the latest Firmware.
Now I thought this might just be a isolated instance but it was not, I replaced the other one this morning and purchased another one. While I was there I asked the technician to also update the firmware on the 2 new ones as well. However both of them gave exactly the same issue what I picked up. Luckily this time it happened to him and not me… He ended up changing those 2 BMS boards as well.
Personally I think there might be a problem with the BMS boards on the US2000c range that I received.
The batteries also did not have the same serial numbers as the old ones. The US2000b plus batteries started with PPTBH… but the new ones I received started with H21C… Not sure if this has any relevance but 3 brand new batteries gave exactly the same issue.
Just though I would share this info with you.
I would suggest when you do buy new US2000c batteries to let your supplier update the firmware for you. Just my suggestion

"4. I can get one of those Geyserwise Titanium PTC elements if it would make a difference? It is just 2 and a half people showering every day, and washing dishes once a day."
I have 1.5kw one in my geyser, works fine for me but use with caution.
No one told me of the statup spike it makes every time. It spikes to 3.7kw for 5seconds then dropping to 1.5kw for rest of the time.