Welcome to esphome-jk-bms-can Discussions!

[Uksa007]

👋 Welcome!

Please consider supporting my work so I can continue to develop new feature and provide help and assistance.

We’re using Discussions as a place to connect with other members of our community. We hope that you:

• Ask questions you’re wondering about.
• Share ideas.
• Engage with other community members.
• Welcome others and are open-minded. Remember that this is a community we
  build together 💪.

Please don't post in this discussion it's getting too big and hard to find peoples comments, please create your own discussion
If you have a specific question related to your inverter or building the hardware please create your own discussion here

Please note I have a Hardware kit that has all the Hardware required to connect to the BMS and Inverter

[MortenElontech]

Hi, Really love your project. Just have a question for you. If i understand the CAN protocol of the inverters correct, the battery packs should work as master/slave if you have more than one pack attached to the inverter. Would you be able to connect more than one pack to the inverter, with your project?

[Uksa007]

If i understand the CAN protocol of the inverters correct, the battery packs should work as master/slave if you have more than one pack attached to the inverter. Would you be able to connect more than one pack to the inverter, with your project?

• Pylontech have multiple interfaces, they are all connected together with link ports(rs485?), the master communicates to the inverter using the CAN port.
  That would be a different architecture to how it currently works.
  If you just connected ESP32's to each BMS they will all be trying to communicate with the inverter, which would just cause chaos.
  There is currently no way to link the esp32s and have a master communicate with the inverter.
  It sounds simple but in reality there would have to me a major re-architect and rewrite to facilitate it.
  I simply don't have the hardware required(second set of batteries and BMS) to even start looking at it.

• Goodwe seems to utilise one CAN bus with all batteries connected on the one bus, it is unknown how this operates.
  Does one battery act as the master and they send data to it? Just guessing without access to CAN bus logs to see how it communicates.

- My thoughts at the moment are if you need more capacity just add more of the same cells in parallel then you don't need another BMS. EG 2P16S, 3P16S etc. See image below

• If you need more current than 200A: Connect one BMS to inverter, you can then control current and see voltage for the total parallel pack, alarms etc for the not connected BMS's will have to be managed locally.

[Uksa007]

Have created a Patreon account, I suggest the Alpha tester membership as that is where the early access code will be once funding goals are met.
https://www.patreon.com/Uksa007Codedevelopment

[dfch]

Hi there and thank you for your quick reply. The current setup I am working on is a system 3*3 MultiPlus-II 48/5000 inverters in a 3-phase setup where each phase has 15000VA/12000W (I plan to add an electric shower that requires 9000W on a single phase). And yes, maybe I only represent a minority use case. Currently I just use a 1000A smart shunt, so technically I do not need a multi BMS solution (while also losing insights into the individual cells).
I subscribed to your alpha level and am looking forward to seeing your progress on the project. If you like me to do some tests, please let me know.

[Uksa007]

Thanks for your support!
I have created separate discussion for multi BMS here
#20

Please continue discussion there.

[vdiex]

Hi Uska007,
thanks, the project is very interesting.
I also have a Deye inverter and a jk bms!

Monitor and control a JK-BMS via UART-TTL projekt is runnung i get data to home assistent !

When i try your code i get following error:

Secret 'domain' not defined
in "/config/esphome/jk-bms-can.yaml", line 79, column 11:
domain: !secret domain

how do i this :

upgrade ESPHome by running "pip3 install -U esphome"

please help thank you !!!

regards

[HarryR7]

I will try to connect them in the described way, of course.

[vdiex]

Hello Uksa007,

thanks for the quick answers !

-This is to upgrade ESPHome to the latest version, I do it from the command prompt on windows.

well i use Home Assistent in Virtualbox on a MAC !?

-PS unless you have it connected to a working Inverter CAN bus it won't work as it needs CAN bus comms or ESPhome kernel panics and reboot loops.

So i need to connect the can to the inverter?
The esp32 loops if there is no can connected ?

1. stepp i wanted to test the com with JK first and see in HA if that worked.
2. stepp add the Inverter to test...

thanks and regards

[Uksa007]

well i use Home Assistent in Virtualbox on a MAC !?

No idea I don't have a MAC, you will need to follow whatever instructions you used to install it, to see if they can advise how to upgrade it to the latest, I run HA in a docker, and with that I can just recreate the docker container with a new version, maybe there is something similar.

It will not work unless you have it connected to an inverter, there is a bug with the ESP32 that causes a WDT reboot unless the CAN data is acknowledged, there is nothing I can do about it, it is designed to run with an inverter connected. esphome/issues#3317

[vdiex]

Hello Uksa007,

thanks !

[Uksa007]

Hi,

I'm putting together a list of know working inverters, can you confirm your inverter is working correctly, eg charging starts and stops ok?
Can you let me know the make and model inverters and the settings you are using in the inverter?

Thanks.

[manjulabw]

dose this method work for deye inverter. if someone has experience please let me knw

[vdiex]

after testing with inverter i can confirm its working with deye inverter 5kw single ph EU version.

tested with 8S connected to the BMS thats why it shows 31.74 volt

[Uksa007]

after testing with inverter i can confirm its working with deye inverter 5kw single ph EU version

That's great news, well done!

Do you have a 4K7 Resistor between the TJA1050 and ESP32 RX, I couldn't see one in the pics, its to level shift the TJA1050 5V to 3.3 for ESP32?

[manjulabw]

after testing with inverter i can confirm its working with deye inverter 5kw single ph EU version.

can i ask your email please

[vdiex]

Hello Uksa007
Thanks again for this great project !

-Do you have a 4K7 Resistor between the TJA1050 and ESP32 RX, I couldn't see one in the pics, its to level shift the TJA1050 5V to 3.3
for ESP32?

Yes 4K7 R between !

hello manjulabw please ask your question here i try to help !

clip of the configuration...

clip.mp4

[Uksa007]

@vdiex
Hi,

I'm putting together a list of know working inverters, can you confirm your model inverter and the inverter is working correctly, eg charging starts and stops ok?
Can you let me know what settings you are using in the inverter for the battery?

Thanks.

[manjulabw]

@vdiex if you can do another module for my deye inverter please let me know. ill pay the cost. 😊

[Uksa007]

sure i can do that program your unit !
but better wut be you setup a HA in a virtualbox then i do it via Remote Software.

Just a FYI, you don't need HA to use ESPHome to install firmware.
I do all my developing and testing on my windows PC without HA.

https://esphome.io/guides/installing_esphome.html

[vdiex]

hello manjulabw, at what country are you?

Thanks Uksa007 i gonna try this on esphome.....

[manjulabw]

Israel.

[vdiex]

i am off grid for now as well, maybe april i could send it.

[Uksa007]

@manjulabw I'm starting to build plug and interfaces, please see the following link:
#16

[MichaelK1961]

Hi
I am totally new to this subject, it is my first project, but I want to learn.

When I follow your guidelines https://esphome.io/components/canbus.html?highlight=can#wiring-options on how to hook up the components I am puzzled about the name on the pinouts. I use exactly the same ESP32 DEVKITV1, but the only pin that correspondence with print on ESP32 and your drawing is 3V3, your 5v goes to D23 is that right? And which pins are used from JK BMS to ESP32?
Regards Michael

[Uksa007]

the only pin that correspondence with print on ESP32 and your drawing is 3V3, your 5v goes to D23 is that right

The 3V3, 5V(VIN) and GND go the corresponding pins. on the ESP32.

These pins are configured as below and match the GPIO pins in the diagram below:
Don't forget the 4k7 resistor between CAN RX and ESP32

# ESP32 Serial port pins:
# GPIO pins your CAN bus transceiver(TJA1050) is connected to the ESP, note! TX->TX and RX->RX. 
  can_tx_pin: GPIO23
  can_rx_pin: GPIO22
# GPIO pins your JK-BMS RS485(TTL) is connected to the ESP TX->RX and RX->TX. 
  tx_pin: GPIO17
  rx_pin: GPIO16

[iovcharyk]

Hello, does anybody try to use ESP32 via BLE and CAN communication? Unfortunately my bms doesn't support UART communication, so I'm using BLE.

Here is my code which working well JK-MBS <-> ESP32 via BLE: syssi#249

But I can't add code to work with CAN transceiver as program isn't compiled (I am not a programmer :( )

[iovcharyk]

Thanks, indeed for CAN communication it should be something between 50 and 99. I used L52 but nothing :(
Probably this is due to no UART communication between BMS and ESP32 (I see constant 3.3V on Rx and Tx pins)

[Uksa007]

Check you have TX and RX correct: (note this is correct for black models, other models may be mirrored due to connector orientation.)

[iovcharyk]

I used the esp32-example.yaml to check the UART communication.
Connection:

(I also disassembled BMS to check that connection between GPS connector and ESP32 is good)

But that's only what I have in the logs:

[13:05:43][C][jk_bms:584]:   Icon: 'mdi:timelapse'
[13:05:43][C][mdns:108]: mDNS:
[13:05:43][C][mdns:109]:   Hostname: jk-bms-uart
[13:05:43][C][ota:093]: Over-The-Air Updates:
[13:05:43][C][ota:094]:   Address: jk-bms-uart.local:3232
[13:05:43][C][api:138]: API Server:
[13:05:43][C][api:139]:   Address: jk-bms-uart.local:6053
[13:05:43][C][api:143]:   Using noise encryption: NO
[13:05:46][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[13:05:51][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[13:05:56][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[13:05:57][D][api:102]: Accepted ::FFFF:192.168.0.17
[13:05:57][W][api.connection:085]: ::FFFF:192.168.0.17: Reading failed: BAD_INDICATOR errno=11
[13:06:01][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29
[13:06:06][D][uart_debug:114]: >>> 4E:57:00:13:00:00:00:00:06:03:00:00:00:00:00:00:68:00:00:01:29 

[Uksa007]

Check the TX and RX pins in the code are correct, they were reversed in that file(I have fixed now)
tx_pin: GPIO17
rx_pin: GPIO16

[Uksa007]

@iovcharyk
Hi,

I'm putting together a list of know working inverters, can you confirm your Growatt SPF5000 inverter is working correctly, eg charging starts and stops ok?
Can you let me know what settings you are using in the inverter?

Thanks.

[straga]

DEYE SG03LP1-EU and JK-B2A24S-20P. Connect today.

[Uksa007]

Great work, looks good!

[straga]

I have question, Deye shows own SOC, BMS own. ?

[Uksa007]

The SOC reported to the inverter is the same as the JK-BMS capacity remaining.
Check what the JK-BMS app is reporting.
My inverter correctly displays the SOC, have you selected the correct battery profile for your configuration of battery?
eg Pylon for 15s, Goodwe/BYD etc for 16s

[straga]

I have same like yours setup 3.2V * 280Ah * 16 = 14.3kWh , EVE280. On the inverter I am select profile 0.

JK BMS from BLE same like CAN. Battery setting ->

[Uksa007]

So what is correct SOC 95%?
You would need to check with manual/manufacturer, maybe that is normal and it will work out it's own SOC after a few cycles?

[straga]

Correct probably on the JKBMS, Need to wait a couple of times, maybe that recalculate. Float: volts 54.4 correct?

[Uksa007]

Float: volts 54.4 correct?

I do not use float voltage, after bulk it goes into absorption for 30min(for balancer to work) then turns off charging.

[straga]

Now same SOC after discharge/charge

[straga]

idle stroke, data get over rs485 every 5sec.
If I set 80% battery for discharge in the deye . Anyway inverter discharge 16-40w. If I am turn off discharge over CANBUS, anyway discharge. How I am understand that normal like regular UPS always charge capcitator for realtime switch home for battery.

[Uksa007]

idle stroke, data get over rs485 every 5sec.
If I set 80% battery for discharge in the deye . Anyway inverter discharge 16-40w. If I am turn off discharge over CANBUS, anyway discharge. How I am understand that normal like regular UPS always charge capcitator for realtime switch home for battery.

Hi,
Sorry, I'm not understanding what you are asking.
Sounds like you need to configure the inverter how you want it to operate.
I would suggest looking at the user manual, I don't have any knowledge how the Deye inverters are configured.
Regards.

[straga]

Your Inverter works like this. Just for more information.
As I understand the canbus, we cannot completely prohibit the discharge. The rs485 commands to control the jkbms do not work? We need to use Bluetooth right?

[Uksa007]

Your Inverter works like this.

I don't what you mean, works how?

The CAN bus data is sent every 1 second.

[Uksa007]

Exciting Announcement.
I Have been busy designing a hardware Plug and play hardware interface to make connection to the BMS plug and play.
Will be available to Patreon members first.

[nayias]

Hello all,

I need your help to get my project up and running. I just can't find my error. The esp is constantly rebooting because he doesn't receive any answer from my inverter.

My setup:

Deye 5k-sg03lp1-eu ( @straga and @vdiex have this one too and everything works for them).

Esp32 -> https://www.makershop.de/plattformen/nodemcu/espressif-esp32-dev-kit-board/

TJA Interface -> https://www.amazon.de/dp/B07DK93W6F

I quickly soldered the whole thing on a breadboard because I was annoyed by all the cables.

The JK-BMS part works and I get all values from the BMS but the CAN side does not work.

Here is a picture of the test setup.

Am I using the wrong components or have I wired something wrong?

On the software side i used the content from esp32-example-can.yaml.

There I have the following GPIO settings:

# ESP32 CAN/Serail port pins:
# GPIO pins your CAN bus transceiver(TJA1050) is connected to the ESP, note! TX->TX and RX->RX. 
  can_tx_pin: GPIO17
  can_rx_pin: GPIO16
# GPIO pins your JK-BMS RS485(TTL) is connected to the ESP TX->RX and RX->TX. 
  tx_pin: GPIO32
  rx_pin: GPIO33

I changed the ota, wifi and api entries. The rest is unchanged.

Can you help me?

Thanks in advance

nayias

[vdiex]

did you try using the pins 16/17 for jk and 22/23 for deye ?
this works for me.....

# ESP32 CAN/Serail port pins:
# GPIO pins your CAN bus transceiver(TJA1050) is connected to the ESP, note! TX->TX and RX->RX. 
  can_tx_pin: GPIO23
  can_rx_pin: GPIO22
# GPIO pins your JK-BMS RS485(TTL) is connected to the ESP TX->RX and RX->TX. 
  tx_pin: GPIO17
  rx_pin: GPIO16

[Uksa007]

Yes you should remove the extra resistor and use a multimeter to check the resistance of the can bus.
When the inverter is connected to the TJA1050 it should be 60 ohms, what is the measured value?
Measure the TJA1050 has 5V at it's pins, what is the voltage?

I use the exact same TJA1050 module, from ebay.

If still not working try using:
can_tx_pin: GPIO23
can_rx_pin: GPIO22

If still not working replace TJA1050.

[nayias]

Sorry for the late response but i was a bit bussy.

I ordered on amazon 2 new TJA1050 module and it was indeed a faulty can module.

For my new setup i used as adviced the ports 22 and 23 for can communication but it doesn't worked with the old tranceiver.
So i used one of the new revceiver and it instant worked.

I almost freaked out because that has now cost me a lot of nerves and only because the module was faulty -_-.

In the future I order always several modules -_-

Thanks for your help!!

[Uksa007]

Glad you got it working!

Please consider supporting my work so I can continue to develop new feature and provide help and assistance.
https://www.patreon.com/Uksa007Codedevelopment

Thanks.

[Uksa007]

@nayias
Hi,

I'm putting together a list of know working inverters, can you confirm your Deye inverter is working correctly, eg charging starts and stops ok?
Can you let me know your model and setting you are using in the inverter?

Thanks.

[oseldusan]

Hi.
There are some posts on internet , that ESP32 consumption is around 160mA when wifi is on , and just 20mW , when it is off. Do you have any idea , how to disable wifi& bluetooth ? Thanks

[Uksa007]

im putting together same setup with same inverter. In original manual there is no 4.7 ohm resistor? should i use it or not?

Hi,
Not sure which manual you are referring to, my documentation has always had the resistor:
https://github.com/Uksa007/esphome-jk-bms-can#schematics

Please note it is a 4.7K ohm resistor.

Please consider supporting my work so I can continue to develop new features and provide help and assistance.
https://www.patreon.com/Uksa007Codedevelopment

[denveronly]

Youre right, i had my eyes closed there
Sorry

[Uksa007]

Youre right, i had my eyes closed there Sorry

No problem, I also have designed a hardware interface that has all of the hardware needed for direct connection to the BMS and inverter, essentially plug and play.

It is in the final stages of testing and will be for sale soon.

[denveronly]

im in for making it myself, it is like a little challange with a great reward Thank you for your work. would be on patreon when i succseed It is great that you have it combined. if i fail i will be contacting about that.

Friend, can you point my out where i can be wrong.
My BMS is JK-BD6A20S15P . it is not in supported list, but i guess it has the same chip inside with the closest one 10p.
i have two ports 3 pin can/rs and 4pin. gps (lol gps). should i use GPS with a 4 pin JST?

im using this cable as advised but i cant get it plugged, it is a bit wider and doesnt have a place to clip

[Uksa007]

Hi,
Yes you need to use the 4 pin GPS port.
The connector is a normal JST not a GH, see photo I found of it:

[oseldusan]

BTW. I have esp32-wroom-32D. I used step-down board ( costs 1,9Eur ) , to decrease power from 48V ( from JKBMS ) to 5V and I connected it to pins on ESP32 board. There is PIN marked 5V , and beside it GND. Unfortunately , board doesn't work ( red LED has been on ) , and it overheated a lot. Finally I come to know , that GND near by 5V is not same as other two GND pins on board at the other end of board. That one has 2MOhhm between itself and other two GND. If I connect 5V and GND at other side of board it works. Maybe faulted board ( faulted GND pin ) ?

[Uksa007]

Hard to tell I would remove it and power if it from USB to see if it shows any signs of life.
Consider supporting the future development https://www.patreon.com/Uksa007Codedevelopment

[jirdol]

Hello,

thank you for this tutorial. Could I ask for some advice? I have everything working, I can see the JK-BMS values in HA. The Goodwe 3648-ES hybrid inverter also sees the values (voltage and SOC status). The communication status also says it is OK. The problem is that the battery can only be discharged but not charged. Do you have any advice on where the problem might be? I have a Lifepo4 16x 3,2V 280Ah.

Thank you very much in advance.

[Uksa007]

I would have loved to stop at 95% SoC. Studies shows that battery last longer when not fully charged and discharged.

Set the Absorption voltage to 54V and 1 min absorption time, that will get you pretty close to 95% SOC.

[jirdol]

For Eumobong

Hello,

Thank you for the explanation, that makes sense. Exactly as you say, charging the battery to 100% leads to a significant reduction in life and I don't want that in my case.

[jirdol]

For Uksa007

Hello,

Thank you for your response. I tried setting the Bulk to 54V but the waveform is still the same. The battery does not reach the 54V voltage. The current starts dropping at about 53.3 and drops slowly to 0 and the maximum voltage on the battery is 53.7V (it does not switch to the absorption phase) SOC is at 94%. This process is still the same, the only difference is that when I set Bulk to 55.2V so at 54.4V the battery is at 100% and the voltage stops at about 54.8V -54.9V and the current also drops but still some small flow and completely throws the cells off. At 54,4V when SOC is 100% the cells are with a difference of about 0,010V which is OK. If I continue charging they start to slowly diverge to the extreme of 0,25V and already the BMS hits and disconnects.

I was still wondering if the absorption setting has an effect on the charging. I have it set to 30min as you have in the basic settings. Could this setting affect the fact that it always starts to limit charging just before the desired voltage is reached, or is it nonsense?

Thank you for your time!

Translated with www.DeepL.com/Translator (free version)

[Uksa007]

I tried setting the Bulk to 54V but the waveform is still the same. The battery does not reach the 54V voltage

How long did you leave it? It may take some time specially if the cells are not top balanced.
Have you checked the BMS is reading the correct voltage, you can calibrate it if not?

At 54,4V when SOC is 100% the cells are with a difference of about 0,010V which is OK. If I continue charging they start to slowly diverge to the extreme of 0,25V and already the BMS hits and disconnects.

If the BMS is disconnecting due to overvoltage of cells then it sounds to me like you need to top balance the cells.
Did you Top balance them before building the 16s pack, it is always recommended to put all the cells in parallel and charge them up to 3.65v with a power supply.

I was still wondering if the absorption setting has an effect on the charging. I have it set to 30min as you have in the basic settings. Could this setting affect the fact that it always starts to limit charging just before the desired voltage is reached, or is it nonsense?

Absorption does not limit the charging in anyway apart from time, it simply starts a timer to stop charging after default of 30min.

What setting do you have configured in the BMS for cell over voltage etc?

[Uksa007]

Thank you for the explanation, that makes sense. Exactly as you say, charging the battery to 100% leads to a significant reduction in life and I don't want that in my case.

Do you realise that the LF280K cell data sheet specifies that the cells can be charged to 3.65V(58.4v 16s) discharged down to 2.5V(40V 16s) and you will get 6000 cycles if in a fixture (clamped).

We are already charging significantly less than these voltages!

Callender ageing will kill the cells long before you reach 6000 cycles (16.4 years)

[straga]

For Deye: charging_enabled switch not working. I am set Disable but anyway charge. Only one more board over BLE can disable direct on JKBMS.

[Uksa007]

This is working correctly for me with the Goodwe inverter.

What battery profile are you using in the inverter?
What is the "Charging status" in the logs or in Home Assistant, it should say Disabled if the charing switch is off
Can you please attach a log file?

[Uksa007]

You need to set Battery type as Lithium and set your Battery Ah and currents:

Set Lithium mode to 00

[straga]

use switch switch.jk_bms_can_charging_enabled, It ok that set 0 Amp 0 volt and Deye shows that. But anyway charge. May need some send more.
For Deye use profile 0.
And if switch Disable charge. SOC from BMS shows stand-alone, and Deye shows its own. But if set enabled, Deye gets SOC from BMS.

[Uksa007]

Whats is profile 0, what battery is this, Pylon, user defined?

Do you have Activate battery enabled, this should NOT be enabled.

The charge voltage, current and the charge enable flag are all sent correctly, there is nothing else that can be sent in regards to charging.

Other user are using deye inverters without any issues, so I think this may be a configuration issue with the inverter.

[vdiex]

Ok sir I will collect the data and forward with mail ! Thanks & Regards

…

On Sun, Apr 9, 2023, 16:55 Uksa007 ***@***.***> wrote: @vdiex <https://github.com/vdiex> Hi, I'm putting together a list of know working inverters, can you confirm your model inverter and the inverter is working correctly, eg charging starts and stops ok? Can you let me know what settings you are using in the inverter for the battery? Thanks. — Reply to this email directly, view it on GitHub <#1 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACUBK7WUHQLAU2CLDBQX2ETXALEVHANCNFSM6AAAAAARD6S74Y> . You are receiving this because you were mentioned.Message ID: ***@***.*** com>

[denveronly]

i got a little bit further
so i hooked up TJA1050 to ESP, and hooked up canH to canL of inverter and canH to canL to inverter with no crossover.
BMS is giving its messages normaly.

Can protocol i guess is being activated also

I have BMS discovered with sensors in HA, but it is rebooting every minutes and becomes unavailable and then available.

Inverter battery mode is set to 00 (means Pylontech protocol) but it doesnt discover any data from TJA
Prveious screenshot is on Platform: arduino, now the one with esp-idf

Im sure that i connected everything out normaly, because in other positions i dont get it connected to Homeassistant and that CAN purple. My ESP is WROOM 32D

Im seeing the following log screen

19:07:21][I][main:330]: No rx can 0x305 reply. Rebooting...
[19:07:21][D][button:013]: 'Restart button' Pressed.
[19:07:21][I][restart.button:012]: Restarting device...
[19:07:21][I][app:134]: Rebooting safely...

and in the code there is a description this could happen if detect no CAN reply
Well my inverter is not showing any info maybe it is the problem? Can you help me out please?

[denveronly]

well one thing i did'nt reach is charging to 60volts.
Deye wrote in specs that it is 40-60v inverter, but refused to charge batteries higher than 58.8volts
My dream was if i could hook up BMS i could tell it that battery wants more.
Well i did.
But it doesnt want to make more than 58.8 despite i set 60volts, and then tried 62 volts and keep getting 58.8 max. What a lame deye

Anyway your work is awesome, i would be happy to see the only BMS to Homeassistant feature without CAN
The described glitch belongs to the inverter, so i think there is nothing you can do

[Uksa007]

Maybe try 59v
What is the charging status in Home Assistant?

[denveronly]

It was charging with a very little current 300-200-100w decreasing. Same as it was on Lead acid mode

[denveronly]

also would like to ask
there is a switch
Charging manually (top bal)

what does it do?

[Uksa007]

Charging manually (top bal)

Manually requests charging from the inverter, I use when I want to leave the charger on to make sure the cell are all top balanced 100%.

[denveronly]

By the way i noticed that temperature readings show in Inverter shows mosfet temp not battery temp
There are two battery sensors in BMS (in my case it is two big Linmc batteries)
It would be great for the code to pass through to inverter the highest temp of that two sensors

[denveronly]

Hey friend, can you look in to this?

[Uksa007]

Resolved in V1.13.2 27/4/23 Send Max Temperature of T1, T2 to inverter

Please consider supporting my work so I can continue to develop new feature and provide help and assistance.
https://www.patreon.com/Uksa007Codedevelopment

[denveronly]

Connected to your Patreon friend, Thank you for your work. It is really helpful
I hope others consider making this step so we have it better and better

[Uksa007]

Thanks so much for your support, it really is appreciated!

[straga]

For Deye inverter. If the set voltage is 0v, Deye does not get SOC from CAN, try recalculating from self or .. .
When "Wait" and CAN are set to 0v, SOC gets from the inverter brain.

[Uksa007]

For Deye inverter. If the set voltage is 0v, Deye does not get SOC from CAN, try recalculating from self or .. .
When "Wait" and CAN are set to 0v, SOC gets from the inverter brain.

Try this code, it will always send the charging voltage, but turns off the current:
Let me know if that fixes it for you?
Replace line numbers 211 to 227 with this code:

           if ((id(charge_status) == "Bulk") | (id(charge_status) == "Absorption") | (id(inverter_chg_on).state)) {
               can_mesg[0] = uint16_t(id(charging_voltage).state * 10) & 0xff;
               can_mesg[1] = uint16_t(id(charging_voltage).state * 10) >> 8 & 0xff;
               can_mesg[2] = uint16_t(id(charging_current).state * 10) & 0xff;
               can_mesg[3] = uint16_t(id(charging_current).state * 10) >> 8 & 0xff;
            } else {
               can_mesg[0] = uint16_t((id(charging_voltage).state - ${rebulk_offset}) * 10) & 0xff;
               can_mesg[1] = uint16_t((id(charging_voltage).state - ${rebulk_offset}) * 10) >> 8 & 0xff;
               can_mesg[2] = 0;
               can_mesg[3] = 0;
            }
            if ((!id(charging_switch).state) | (!id(inverter_charging).state)) { /// Overrides to disable charging
               can_mesg[0] = uint16_t((id(charging_voltage).state - ${rebulk_offset}) * 10) & 0xff;
               can_mesg[1] = uint16_t((id(charging_voltage).state - ${rebulk_offset}) * 10) >> 8 & 0xff;
               can_mesg[2] = 0;
               can_mesg[3] = 0;
            }

[Uksa007]

Did you have any luck testing this code?
I have been using it and it works ok for me, though my inverter never had the same issues as yours with the SOC changing.
Can you let me know if it resolves your issues?

Please consider supporting my work so I can continue to develop new feature and provide help and assistance.
https://www.patreon.com/Uksa007Codedevelopment

[evpatiy2016]

Hello. I need your help in setting up communication, inverter with home-made battery (BMS JK-B2A24S15P li-ion capacity 320 Ah v.min-42v//v.max-50v). Inverter Solis RHI-5K-48ES-5G.
After assembling the esp32 board according to your example, esphome programming, communication with the battery took place, but the error is high voltage on the bms cells.
Is it possible to contact you individually.. To solve this issue. Sorry for my English.

[Uksa007]

Hi,

You can contact me directly on Patreon, else I will try to answer here.
Please consider supporting my work so I can continue to develop new feature and provide help and assistance.
https://www.patreon.com/Uksa007Codedevelopment

[evpatiy2016]

[evpatiy2016]

I understand why there is such an error, but I do not know what changes are needed in the program code

[denveronly]

In the first lines of code is you should change voltage, charge and discharge amperage and rebulk voltage

[evpatiy2016]

n the code, you need to specify the type of li-ion battery, discharge 3.7, charge 4.2. In the code, lifepo4 is configured, which is why the high voltage of the BMS cells is written

[Uksa007]

The alarms are generated from the JK-BMS and sent to the inverter.
You need to configure the JK-BMS with the correct parameters for your battery chemistry.
In the code you can configure the charging voltage amps etc.

[evpatiy2016]

the temperature is normal, that of the transistors, and t1 t2

[Uksa007]

Are there any alarms in jk-BMS?
Can you attach log file from the esp32
Run esphome logs yourfile.yaml

[denveronly]

Have a question about configuring right the absobtion, rebulk offset voltage, and time for my type of battery chemistry. I just dont want to mess it up.
I have a Li-Ion NMC (LG CHEM) batteries from VW EV connected as 14s with total 58.8volts (at 4.2v per cell) with 12kWt total power
Ive set ESP Absorbtion voltage 58.7 (just dont really want it to be 4.2, its lithium)
Ive set the inverter to charge the battery to 97% SOC (a little improvement to battery life, it gets charged to 58.0 volts TOP seen on graphic)
rebulk offset is 2volts, time is 60 minutes.

Im seeing this graphic
Battery goes to 58v - highest spike, then a slight drop in an hour to 57.3, then i get a drop to 57.1 volts in 6 hours which contain every 15minutes charging spikes 1 minute duration of 0,3 volts higher (seen on graphic)

Ive googled and read many forums, and cant really tell if that is normal, and maybe i should edit the config to other settings.
Also im worried about that charging 1 minute spikes every 15 minutes

[Uksa007]

The first setting is the most important, Batt Mode: Lithium!!!
If you have Use Batt V or use Batt % I think it will do its own thing, and not follow the BMS and not work correctly.

The charging status shows that its not getting to the Absorption voltage, and hence the charger is staying on and you see the peaks.

Other users have reported Deye inverter will not charge much higher than 58v, so start there(or lower) and see if it gets to absorption status.

[denveronly]

The first setting is the most important, Batt Mode: Lithium!!! If you have Use Batt V or use Batt % I think it will do its own thing, and not follow the BMS and not work correctly.

The charging status shows that its not getting to the Absorption voltage, and hence the charger is staying on and you see the peaks.

Other users have reported Deye inverter will not charge much higher than 58v, so start there(or lower) and see if it gets to absorption status.

Yes i know friend, it is Lithium mode set with 00 mode, Battery V is for Lead Acid batteries. Thanks
Yes this may be the point, i will edit the config on ESP to lower voltage 58.0, and set inverter to charge 100% SOC

Deye inverter Tops up only to 58.8volts, well 58.7 volts for real. no matter what you are asking from it (ESP BMS, or Batt V set to 60v) Ive tried that

I will try and report my status change on this

[Uksa007]

set inverter to charge 100% SOC

Where are you setting this?
I don't see it anywhere in the manual, page 28 onwards?

https://www.deyeinverter.com/deyeinverter/2023/04/25/%E3%80%90b%E3%80%9130240301001163-%E4%BD%BF%E7%94%A8%E8%AF%B4%E6%98%8E%E4%B9%A6-%E5%82%A8%E8%83%BD%E5%8D%95%E7%9B%B8-sun-(3.6-6)k-sg03lp1-eu-%E5%BE%B7%E4%B8%9A%E8%8B%B1%E6%96%87.pdf

[Uksa007]

@denveronly Can you please create your own discussion thread, this one is too large and it's hard for me to keep track of discussions.

Please don't post in this discussion it's getting too big and hard to find peoples comments, please create your own discussion

[Uksa007]

Please don't post in this discussion it's getting too big and hard to find peoples comments, please create your own discussion it will be easier to reply to you.