Welcome to dbus-serialbattery Discussions! #55
Replies: 25 comments 12 replies
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Ill kick-off, Sander here! Electronics engineer by profession at a small IoT sensors company. I contributed the initial Sinowealth code because I was planning on building a serial-to-can converter to integrate my battery/bms in the Venus OS. When I found this project I the microcontroller project went overboard, writing a bit of python was a lot less work. My setup consists of: This is all installed on our boat, a Victoire 1122 (11 meters/37 feet sailing yacht) For the discussion: |
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I'm a software engineer and created the driver because my first set of cells were are mismatch of 80Ah cells (some only doing 74Ah) and that caused me enless problems when the ESS system did not know about the battery stats. Linking the BMS started that all out. My setup consists of: |
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Hi Louis, I have a 12KWh LiFePO4 16 cells with a 150A Daly Smart BMS connected to my Victron power system: Multiplus 48/3K, Cerbo & MPPT. Then tested removing the complete 17-pin connector of the BMS and also it remains ON. Looks like some voltage from the Cerbo is feeding back to the BMS on the UART port keeping the FETS switched ON. Have you seen this issue? Did I do something incorrectly? I am currently using Cerbo Venus OS 2.7. Will try today with 2.8 Thank you very much, Ibrahin |
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Hi Ibrahin Isolated cables means there is no cable link between the BMS side and the GX side, so no power can flow from one to the other and you need to supply power from both sides (the USB and the battery Red power wire). Most cables are not isolated, so the power can flow through to the other side. If you just connec the Ground and the Rx/Tx only the data is connected. The chip in the cable is then powered by the USB side. If you disconnect the cells from the BMS then there is no power flowing from the USB/chip to the BMS. |
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Hei Louis,
Thanks for the quick response.
I am afraid the cable I am using is not isolated as you mentioned.
Nevertheless, it does not have the red power line on it. It only has
black,green and white which I believe is gnd, tx and Rx (see attached
picture) am I wrong?
I also have a victron USB-RS485 converter or cable which I use with the
Carlo Gavazzi meter. I might try with this one. Is RS485 same as UART
cable??
Med vennlig hilsen,
Ibrahin Chavez
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021, 09:42 Louis Van Der Walt ***@***.***> wrote:
Hi Ibrahin
I suspect that you also connected the Red power wire that is part of your
comms cable.
It is for this reason that I mention under 3) for Requirements that you
should only connect the Ground, Rx & Tx to the BMS unless using a isolated
cable like the Victron cables.
Isolated cables means there is no cable link between the BMS side and the
GX side, so no power can flow from one to the other and you need to supply
power from both sides (the USB and the battery Red power wire). Most cables
are not isolated, so the power can flow through to the other side.
If you just connec the Ground and the Rx/Tx only the data is connected.
The chip in the cable is then powered by the USB side. If you disconnect
the cells from the BMS then there is no power flowing from the USB/chip to
the BMS.
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If you only have Gnd, Rx, Tx then that is fine. The BMS power should not come from the connection. I would look at the BMS then. If the balance leads and the C- B- are both not connected you should not have power on the BMS. |
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The test I did... Disconnected the complete connector of balance lines (17
in my case), with B- and P- still connected to battery and inverter and
UART connected to Cerbo. The BMS does not disconnect the power (it does not
open B- to P-)
Med vennlig hilsen,
Ibrahin Chavez
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021, 10:24 Louis Van Der Walt ***@***.***> wrote:
If you only have Gnd, Rx, Tx then that is fine. The BMS power should not
come from the connection. I would look at the BMS then. If the balance
leads and the C- B- are both not connected you should not have power on the
BMS.
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If B- and P- is still connected it will power the BMS. You need to disconnect those as well. |
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But in normal operation B- is connected to battery negative and P- to
inverter. Then if a condition happens the BMS should open the path B- to P-
(open the fets). Am I right?
Med vennlig hilsen,
Ibrahin Chavez
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021, 10:29 Louis Van Der Walt ***@***.***> wrote:
If B- and P- is still connected it will power the BMS. You need to
disconnect those as well.
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Yes, but there is an outstanding issue #17 where I do not yest show when the bank (battery) on offline. Sometimes the request for data from the BMS does not give a reply and the driver currently tries to keep it alive and request again. This keep alive does not show correctly (after a timeout) that the BMS/battery is offline. |
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Ok, I understand your point now.
Please keep in mind that in "normal operation" I do not want to remove or
disconnect the BMS completely. I just want the BMS to open B- to P- path.
So what is happening now... if some wrong condition happens, the BMS does
not open B- to P-
I understand that if I disconnect them manually then the BMS goes back to
normal.
Do you see my point?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021 at 10:36 AM Louis Van Der Walt < ***@***.***> wrote:
Yes, but there is an outstanding issue #17
<#17> where I do not
yest show when the bank (battery) on offline. Sometimes the request for
data from the BMS does not give a reply and the driver currently tries to
keep it alive and request again. This keep alive does not show correctly
(after a timeout) that the BMS/battery is offline.
If you disconnect the BMS completely it will be fine though.
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Yes that is an issue. But I expect the issue is not with really with the driver, but rather with the BMS. |
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You are completely right.
My next test is to power up the Cerbo from an isolated power supply.
Perhaps a second battery I believe this should solve the problem. If it
does, then I might go with an isolated DC to DC converter from 48 to 12 to
power up the Cerbo.
What do you think?
Do you want me to keep you posted?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021 at 10:50 AM Louis Van Der Walt < ***@***.***> wrote:
Yes that is an issue. But I expect the issue is not with really with the
driver, but rather with the BMS.
The driver can just help with the situation. If the driver was to
correctly show the GX that the battery is offline, the GX will handle that
by not (dis)charging the battery.
However the BMS is in control of what it does. The driver can only change
the GX behaviour by changing the inputs into the ESS parameters.
The driver does not have any control over your BMS.
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Keep us posted. This could help someone else in future. From what I have seen with all the BMS that I have worked with on this driver, I will use any in my own system except the Daly. |
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Which one would you recommend which is comparable in price to Daly? Or at
least in the same price band
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021 at 11:01 AM Louis Van Der Walt < ***@***.***> wrote:
Keep us posted. This could help someone else in future.
I do suspect the issue is with how the Daly handles error conditions.
From what I have seen with all the BMS that I have worked with on this
driver, I will use any in my own system except the Daly.
They have some wierd logic, problematic parameters (that cannot be
customised like all the others) and their protocol implementation makes it
hard to get fast updates from the BMS.
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You can't go wrong with the JBD. The JKBMS is just a small bit more expensive and have active balancers. Both are similar priced to the Daly Smart. |
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Thank you very much.
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021 at 11:08 AM Louis Van Der Walt < ***@***.***> wrote:
You can't go wrong with the JBD. The JKBMS is just a small bit more
expensive and have active balancers. Both are similar priced to the Daly
Smart.
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Hei Louis,
I have a project and looking for a smart software guy like you. Off course
you charge me for your work.
I need to connect an energy meter via HAN port to Victron Cerbo GX.
All the protocol info is here:
https://hanporten.se/
It is a serial protocol, I don't think it should be a problem for you.
My other option is to buy a Carlo Gavazzi energy meter which connects via
RS485 (RS485 to USB cable) with the Cerbo GX. But then it would use more
space on my fuse box and the meter costs 350 Euros with the cable.
https://www.farco.no/tilbehor/tilbehor-invertere/victron-energy-meter-em24-3-phase-max-65a/phase-ethernet
https://www.farco.no/victron/victron-rs485-to-usb-interface-1.8m
Perhaps a good idea is to look into the Carlo Gavazzi protocol:
https://www.gavazzi.no/wp-content/uploads/WM15-kommunikasjonsprotokoll-V1-1-20192510.pdf
I look forward to hearing back from you.
Merry Christmas.
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Thu, Oct 28, 2021 at 11:13 AM Smart Power ***@***.***>
wrote:
… Thank you very much.
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Thu, Oct 28, 2021 at 11:08 AM Louis Van Der Walt <
***@***.***> wrote:
> You can't go wrong with the JBD. The JKBMS is just a small bit more
> expensive and have active balancers. Both are similar priced to the Daly
> Smart.
>
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Hi Louis,
I have not received a reply from you so not sure if you are not interested
or missed my email.
As I mentioned, I am willing to pay fairly for your work.
Looking forward to hearing from you.
Best regards
Med vennlig hilsen,
Ibrahin Chavez
Smart Power AS
+47 47729023
…On Thu, Oct 28, 2021, 10:26 Smart Power ***@***.***> wrote:
The test I did... Disconnected the complete connector of balance lines (17
in my case), with B- and P- still connected to battery and inverter and
UART connected to Cerbo. The BMS does not disconnect the power (it does not
open B- to P-)
Med vennlig hilsen,
Ibrahin Chavez
Smart Power AS
+47 47729023
On Thu, Oct 28, 2021, 10:24 Louis Van Der Walt ***@***.***>
wrote:
> If you only have Gnd, Rx, Tx then that is fine. The BMS power should not
> come from the connection. I would look at the BMS then. If the balance
> leads and the C- B- are both not connected you should not have power on the
> BMS.
>
> —
> You are receiving this because you commented.
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Hi Ibrahin |
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Hei Louis,
Ok let's for within 3 months.
What do you need to know in advance?
Approximated budget?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Tue, Jan 4, 2022 at 6:53 AM Louis Van Der Walt ***@***.***> wrote:
Hi Ibrahin
Sorry for only replying now. I was away for a few days.
I do not have capacity to start a new project in the next 3 months. You
can send me a PM <https://energytalk.co.za/u/louisvdw/> if that will fit
your project timeline, and we can talk.
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Hi Luis,
I agree with waiting for 3 months to start the project.
Do you need anything from me in advance? information, etc?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Tue, Jan 4, 2022 at 8:02 PM Smart Power ***@***.***>
wrote:
… Hei Louis,
Ok let's for within 3 months.
What do you need to know in advance?
Approximated budget?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Tue, Jan 4, 2022 at 6:53 AM Louis Van Der Walt <
***@***.***> wrote:
> Hi Ibrahin
> Sorry for only replying now. I was away for a few days.
> I do not have capacity to start a new project in the next 3 months. You
> can send me a PM <https://energytalk.co.za/u/louisvdw/> if that will fit
> your project timeline, and we can talk.
>
> —
> Reply to this email directly, view it on GitHub
> <#55 (reply in thread)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/AVWJAPTSU6LFWCFFEHGE7PLUUKDPPANCNFSM5FCM7HRA>
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-->Hi Louis, I wanted to touch base with you and make sure that you are on board and available to work on my project. You told me 3 months and I am waiting 😊 hoping it can be sooner. Perhaps you could start by taking a look at what I want and from there you can determine how easy or difficult it is. I look forward to hearing back from you. Med vennlig hilsen, Ibrahin ChavezSmart Power AS+47 47729023 Fra: Smart PowerSendt: 09 January 2022 kl. 11:52Til: Louisvdw/dbus-serialbatteryEmne: Re: [Louisvdw/dbus-serialbattery] Welcome to dbus-serialbattery Discussions! (Discussion #55) Hi Luis, I agree with waiting for 3 months to start the project.Do you need anything from me in advance? information, etc?Med vennlig hilsen, Ibrahin ChavezSmart Power AS+47 47729023 On Tue, Jan 4, 2022 at 8:02 PM Smart Power ***@***.***> wrote:Hei Louis, Ok let's for within 3 months. What do you need to know in advance?Approximated budget? Med vennlig hilsen, Ibrahin ChavezSmart Power AS+47 47729023 On Tue, Jan 4, 2022 at 6:53 AM Louis Van Der Walt ***@***.***> wrote:Hi IbrahinSorry for only replying now. I was away for a few days.I do not have capacity to start a new project in the next 3 months. You can send me a PM if that will fit your project timeline, and we can talk.—Reply to this email directly, view it on GitHub, or unsubscribe.Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you commented.Message ID: ***@***.***>
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Can you please provide me with your personal email? So I don't have to
contact you via Github.
Thank you very much.
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
…On Wed, Feb 16, 2022 at 3:15 PM ***@***.***> wrote:
Hi Louis,
I wanted to touch base with you and make sure that you are on board and
available to work on my project. You told me 3 months and I am waiting 😊
hoping it can be sooner.
Perhaps you could start by taking a look at what I want and from there you
can determine how easy or difficult it is.
I look forward to hearing back from you.
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
*Fra: *Smart Power ***@***.***>
*Sendt: *09 January 2022 kl. 11:52
*Til: *Louisvdw/dbus-serialbattery
***@***.***>
*Emne: *Re: [Louisvdw/dbus-serialbattery] Welcome to dbus-serialbattery
Discussions! (Discussion #55)
Hi Luis,
I agree with waiting for 3 months to start the project.
Do you need anything from me in advance? information, etc?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Tue, Jan 4, 2022 at 8:02 PM Smart Power ***@***.***>
wrote:
Hei Louis,
Ok let's for within 3 months.
What do you need to know in advance?
Approximated budget?
*Med vennlig hilsen,*
*Ibrahin Chavez*
Smart Power AS
+47 47729023
On Tue, Jan 4, 2022 at 6:53 AM Louis Van Der Walt <
***@***.***> wrote:
Hi Ibrahin
Sorry for only replying now. I was away for a few days.
I do not have capacity to start a new project in the next 3 months. You
can send me a PM <https://energytalk.co.za/u/louisvdw/> if that will fit
your project timeline, and we can talk.
—
Reply to this email directly, view it on GitHub
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Hi Regards |
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-->Hi Louis, I hope you are doing well. Are you available now to start with our project? I look forward to hearing from you. Med vennlig hilsen, Ibrahin ChavezSmart Power AS+47 47729023 Fra: Louis Van Der WaltSendt: 17 February 2022 kl. 06:44Til: Louisvdw/dbus-serialbatteryKopi: smartpowernorway; CommentEmne: Re: [Louisvdw/dbus-serialbattery] Welcome to dbus-serialbattery Discussions! (Discussion #55) HiPlease send me a Personal Message on this forum or this one and I can send you an email addressRegards—Reply to this email directly, view it on GitHub, or unsubscribe.Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you commented.Message ID: ***@***.***>
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I got started with LiFePO4 batteries in 2019. There weren't many reasonably priced 30kwh choices available in the USA then. So I ordered a rack-mount system from QH Technology in China. It came just in time for the beginning of our Covid lockdowns. It had some poor design flaws which I have gradually corrected over time. Then this summer I built my own LiFePO4 battery system. The technology available now is so far ahead of what was available to me in 2019 it is quite amazing. I have learned so much, but there is always still room to learn so much more. My DIY system is 3 racks of (16) LiFePO4 prismatic cells in series, each with its own JK BMS, for a total of an additional 42kwh. These work great! Back in 2019, it seemed like lithium was lithium, so I built my system in a metal shed detached from my house - in case of fire. Now we come to see that LiFePO4 can melt but won't catch fire. Still, since I had room in my metal shed, I put my new additional batteries in the shed also. JK wants to communicate with bluetooth. Works great when I go into the shed, but not outside the shed. So I've been experimenting with getting my batteries (hopefully all of them!) to communicate with my Victron Cerbo GX in the house with various cables. So many questions arise from this: For the JK batteries, can dbus-serialbattery handle 3 at once? Can I just parallel the RS485 lines and feed one (isolated) RS485 to USB converter, connected to my Cerbo GX? Or do I need 3 converters and a USB port expander, since the Cerbo only has 2 USB communication port? For my earlier system from QH Tech, each of the 5 rack modules has its own older Pace BMS. I have successfully gotten them in a daisy chain RS485 to communicate with a laptop PC using one RS485 to USB adapter. On the PC, I can see all 5 Pace BMS's. Unfortunately, these Pace BMS's are so old that they pre-date CAN communication, so there is no Victron link option. What would be ideal is to have these (5) Pace BMS's also communicate with the Cerbo GX. Then I would have all (8) BMS's visible in Venus GX. What are my prospects for accomplishing any of this? Any suggestions or ideas from anyone else who has tried anything like this? And thanks again for Louis' great program and all the awesome contributions others have made to this project. |
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If you get data from them you can use Node-RED (which is integrated in Venus OS Large, just google for it) and dbus-mqtt-battery for each battery. Probably the Cerbo GX can't handle that much batteries since it has not that much CPU power as a Raspberry Pi. I would reccomend you to get a Raspberry Pi 4, install Venus OS large, connect all batteries there, aggregate all batteries with a battery aggregator, install dbus-mqtt-battery on Cerbo GX and feed it with the data from the aggregator. |
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This is a very powerful project, thank you. I'm just starting to mess with it and hopefully someone can assist, but my issue appears to be the SOC for the JBD bms units. The current latest version that is available for download to a flash drive is showing incorrect SOC values, about double what the xiaoxing app is showing. I also saw the SSH latest release, this shows the correct SOC, but it no longer supports custom battery names or custom names for the probe.s Does anyone have some leads on a version that shows the correct SOC and and also supports custom battery names and temperature probe names? |
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Ok I will try:
https://github.com/Louisvdw/dbus-serialbattery/tree/v1.0.20231125beta
as it has the custom names in config.ini
cheers.
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…On Sunday, January 21st, 2024 at 2:28 AM, Manuel ***@***.***> wrote:
Sure, just try the third last release after the release from October.
Just kidding. Please open an issue and write down the version numbers and not latest version of something. Else it‘s impossible to help you.
—
Reply to this email directly, [view it on GitHub](#55 (comment)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/BFPZSIKZ2FAU3EDXCGGFNELYPTGSVAVCNFSM5FCM7HRKU5DIOJSWCZC7NNSXTOKENFZWG5LTONUW63SDN5WW2ZLOOQ5TQMJZGYZDSNY).
You are receiving this because you commented.Message ID: ***@***.***>
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Yes so this version has an issue it is doubling the JBD stated SOC capacity when compared to the xiaoxing app.
https://github.com/Louisvdw/dbus-serialbattery/tree/v1.0.20231125beta
This version reports the correct SOC (matches the xiaoxing app) but does not support custom names the options are actually missing form the ini file completely:
https://github.com/Louisvdw/dbus-serialbattery/tree/v1.0.20240102beta
Thank you for your time.
Thanks
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…On Sunday, January 21st, 2024 at 6:27 AM, ServerOutlet ***@***.***> wrote:
Ok I will try:
https://github.com/Louisvdw/dbus-serialbattery/tree/v1.0.20231125beta
as it has the custom names in config.ini
cheers.
Sent with [Proton Mail](https://proton.me/) secure email.
On Sunday, January 21st, 2024 at 2:28 AM, Manuel ***@***.***> wrote:
> Sure, just try the third last release after the release from October.
>
> Just kidding. Please open an issue and write down the version numbers and not latest version of something. Else it‘s impossible to help you.
>
> —
> Reply to this email directly, [view it on GitHub](#55 (comment)), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/BFPZSIKZ2FAU3EDXCGGFNELYPTGSVAVCNFSM5FCM7HRKU5DIOJSWCZC7NNSXTOKENFZWG5LTONUW63SDN5WW2ZLOOQ5TQMJZGYZDSNY).
> You are receiving this because you commented.Message ID: ***@***.***>
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Stop spamming please. You post the same question in 1.000 places at the same time. This is helping nobody and generates a lot of work only because you can't wait for an answer. |
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hello ! brilliant allworks well with 1.0.20230531 nice and stable i am open to anyone who wants to help remotely troubleshoot/tweak etc .... |
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Best would be to read the pinned discussions ;)
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Hi, please also woks with Multiplus II GX (Venus included in inverter) ? |
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Hi |
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Hi all, I was wondering if there's any chance of having some more installation info on the steps needed to get single / parallel BMS's working over CANbus? I have read the documentation, changed the CAN address in the default settings and still no closer to understanding why my BMS's aren't showing up. Hate to have to ask for help but there so little information/discussion on this. To give an example of what I've been trying to achieve, my set up is like this. Cerbo GX Tried with and without line resistors (even made an adapter to convert the line resistor work with the pinout of the WNT board) Just some guidance in the documentation how to set this up would be super helpful.
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👋 Welcome!
We’re using Discussions as a place to connect with other members of our community. We hope that you:
build together 💪.
To get started, comment below with an introduction of yourself and tell us about what BMS/Battery you use. We also love to see pictures of your system if you have.
Please add multiline code or logfiles by useing three backticks (```) or three tildes (~~~) on the lines before and after the code block. See https://www.markdownguide.org/extended-syntax/#fenced-code-blocks for more details.
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