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September 5, 2025 2:15 am
@bporter thanks for the reply. This is my opinion. Don’t get hung up on communication. My brain thinks in volts. The batteries have a high and low voltage. Look at the specs and set accordingly. 56.4 high and 54 float is a great place to start. I cycle mine from 56.4-46. I don’t worry about the SOC. Volts are the main concern
September 5, 2025 2:20 am
@ravasunpower Not sure about the warning 18, but if in lead acid mode don’t sweat it. It will be ok as long as you have the high and low battery settings in. I just put a 6000 on a domestic well and still working through it. It’s definitely different than my 18K.
Topic starter
October 20, 2025 5:37 pm
Have received the cables and took a chance to update Wallmount battery BMS to latest firmware.
All went well with update - checked with BMS Tools - see below.
Yet when I attempted to switch back to Lithium Battery type 1 the following error occurred:
|
W000: Communication failure with battery.
|
Basically after firmware update there is no comms between Battery and Inverter at all.
I have checked the COM cable and even replaced it with spare one - no effect.
It looks like I am permanently stuck with Lead Acid mode.
Topic starter
October 20, 2025 5:45 pm
I have just updated the BMS firmware to the latest.
Connected the BMS tools and checked all - see below:
YET,
When attempted to switch back to Lithium Battery type the following error occurred:
|
W000: Communication failure with battery
|
I have checked cables , even replaced the COM cable with new CAT6 one - no effect.
The inverter does not see the battery anymore.
It looks like The firmware update killed the comms with inverter for good.
I guess I am stuck in Lead Acid mode battery setting for good.
Brgds
K
October 20, 2025 11:19 pm
I was hoping you would get it figured out. I bet Eric will take care of you. Keep us updated and I hope the best
Topic starter
October 23, 2025 12:19 pm
I was told yesterday to do cold restart of entire system including BMS, which I did and ... No change.
The comms from Wall mount battery BMS to inverter is still down...
Will se what @Eric advises
Brgds
K
This post was modified 2 weeks ago 2 times by Krzysiek_KTA
Topic starter
October 30, 2025 2:32 am
A positive update,
Today I decided to look again at my setup and search for any more error logs in addition to what I have already reported.
I have checked the battery error log and found the following:
It is interesting that the last float - stop logs are correlated with the when I tried to switch to Lithium battery type.
It made me wonder and I decided to once more restart the entire system including the battery BMS.
After powering all up and online I switched the battery to Lithium type 1 in old settings page and.... no more errors. The system works again.
I intend to keep the system in Lithium Type 1 battery mode and SoC/time charge settings and see how it goes.
Will keep you posted.
Brgds
K
October 30, 2025 2:55 am
Good deal
Topic starter
November 3, 2025 2:44 pm
Good News,
It seems that the Wall Mont battery BMS comms issues causing inverter stop 'seeing there is battery" when set up in Lithium type mode could be resolved.
It has taken over the 6 months for me, but now my system (6000xp with single EG4 14.3kWh indoor wall mount battery) is back in Lithium battery type 1 mode and has been working without any glitch continuously for last 5 days.
Here is the fix which worked for me:
1. Got RS 232 and RS 485 comm cables from EG4 (Thanks to @Eric)
2. Updated the BMS firmware (RS232-S02T11) as per guide and files from:
https://eg4electronics.com/categories/batteries/eg4-wallmount-indoor-280ah-lithium-battery/
Notes: - The actual firmware file is <RS232 51.2V280Ah S02T19.hex> file within the package.
3. After update the BMS the entire system was power cycled three times with last one having the BMS and battery breaker OFF of for quite a while followed by sequential power up sequence: BMS-Battery Breaker-DC Breaker on inverter-Inverter power switch-inverter EPS switch.
NOTE: the battery type in inverter was set to Lead-Acid mode during power up sequence
4. After the power waited until the Wi-Fi dongle became online and then changed the battery type to Lithium Type-1 and switched the inverter settings from voltage to SoC
5. System become stable and works again as designed.
Overall comments:
- it might not be necessary to update the BMS firmware to fix the issue (my system was working flawlessly Jan-May with old firmware)
- I believe the thorough power cycle of the battery, its BMS and the Inverter might have solved the issue
- I did not do RS-485 firmware update, yet used RS 485 cable to run BMS tools to "see" the battery directly
Hope above helps.
Brgds
K
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