MultiPlus-II connection with Daly BMS / Daly Interface Board (WNT) via CAN?

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panicman asked Jan 5, '23

MultiPlus-II connection with Daly BMS / Daly Interface Board (WNT) via CAN?

Hello Together,

I'm trying since a week or so to connect my MultiPlus-II GX wthy my BMS, which is an Daly 16s 48V 250A BMS. It has communication interface (RS485/CAN) and I set it with the PC-Monitor Software to VICTRONENERGY/CAN. I have also the Daly Interface Board (WNT) that they set to Victron Protocol, as they said, before they send it to me.

This is how my Setup looks like:

I also created an customized RJ45 Cable for VE.CAN so they communicate together correctly:
--------------------------------------------------------------------------------------
VE.CAN Side <-> DALY INTERFACE BOARD SIDE
Green/white GND 3 - 3 GND green/white
Brown CAN-L 8 - 4 CAN-L blue
Brown/white CAN-H 7 - 5 CAN-H blue/white
--------------------------------------------------------------------------------------

Then I set in the Remote Console the VE.CAN to Other BMS and 500 kbit/s, in the Network status the packets are counting up correctly:

But there is no BMS in the device list or the battery monitor list:

This is how I set up the BMS:

There is an video on youtube where they demonstrate that it is possible:
https://www.youtube.com/watch?v=bUpBq6-WklY

Has anyone managed to connect an Daly BMS to Victron via CAN? What do I need to do to get it work?

Here is the Datasheet of the Daly Interface Board (WNT):
DL-WNT-V1.0 datasheet of collection board.docx.pdf

Greetings Jack

Multiplus-II BMS VE.Can

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panicman answered · Jan 10, 2023 at 08:04 AM

After an great hint from an other Forum I have now the solution why it was not working. So here is the Solution:

Set all the DIP-Spwitches on the Interface Board (WNT) down to OFF.
Now you can connect with the PC Software to it via RS485 and read out the settings of the WNT:
In the Engineering Model Tab set the Inverter to VICTRON+CAN, in my case it was set to VOLTRONICS+CAN, after I set it to VICTRON+CAN it was visible in the MP2:

Now, the last thing what I have is, after I set the BMS as the Battery Monitor, I get an Low Voltage Error: Any Idea why? I checked all the Settings, the BMS has no Errors, so the Error came from the Victron, I checked all the Voltage settings, I have absoluely no Idea why it came at 53.22V, has anyone an Idea?

Greetings Jack

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Modifications Space

Node Red Space

Answer 1 · 2023-01-12T10:02:12Z

tochal answered · Jan 12, 2023 at 10:02 AM

hi,

how about changing the setting to see if the error disappears at all , i mean just for trouble shooting, change the under-voltage limit to 1-2 volts lower ( for example 50V) and see if the Error disappears at all !!

if yes, then increase it slowly until error appears again , then you can set a new level , ( if the new level is still acceptable )

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panicman commented · Jan 12, 2023 at 06:15 PM

Undervoltage is set in the ESS to all C-Loads to 46V, Sustain Voltage set to 48V. I have no Idea how it should happen that it shows that message. Anyway, that happens only once and since then not again. I will look if this happens again.

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Andy panicman commented · Jan 17, 2023 at 10:47 PM

The undervoltage message is not coming from the MP or Victron, I believe. Check these settings in the Daly and maybe change them a bit to see if this makes a difference. The MP only shows what the Daly sends via CAN is my assumption.

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tochal panicman commented · Jan 26, 2023 at 08:22 AM

HI panicman, how does it look like? have you got Err Msg again or it is fine now?

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panicman tochal commented · Jan 26, 2023 at 08:27 AM

Nope, did not appear again until now. But we have lost the Sun here for about two weeks, so the Battery is all the Time at ~20% SOC, still on the first cycle. I hate Winters like that...

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tochal panicman commented · Jan 26, 2023 at 09:18 AM

the same here. hahaaa, but i like winter , in winter we can ski.

then may be the reason that you didnt get over voltage Err, is that you didnt reach the voltage. soon or late, sun will appear.

please keep us informed about it. i learned a lot from your post.

thanks and regards

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Answer 2 · 2023-01-17T21:12:53Z

xf2334 answered · Jan 17, 2023 at 09:12 PM

Hi Panicman,

I've the same setup as you. I've set the BMS to Victronenergy/CAN by BMSMonitor Software, like you suggested. But still I get the nonsense values shown. Did you made any other changes that you maybe not mentioned here?

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panicman commented · Jan 25, 2023 at 08:19 AM

Not that I know. Did you connect the BMS directly to the Victron or through the Interface Board? Did you change correctly to VICTRONENERGY/CAN? Because there is an entry for VICTRON/CAN too, but no Idea what it is for... Set it in the Interface Board AND the BMS. Also check the BMS setting in the Victron is set to CAN BMS 500kbps.

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xf2334 panicman commented · Jan 26, 2023 at 08:52 PM

yes, did all the same like you. but 1 difference: I did set can mode in wnt only. Will try to set it in the BMS itself tomorrow.

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xf2334 xf2334 commented · Jan 27, 2023 at 07:30 PM

@PanicMan how did you set CAN at the BMS? With the iphone app, I can set VictronEnergy/CAN, insert Pin 123456 and it looks good in the first place, but when I read the settings again it flips back to None/RS485. Also Restarting/Resetting doesn't help.

The WNT shows a correct setting Victronenergy/Can, when I read out by RS485 with BMSMonitor Software.

But still, I get bad readings by venus gx. When I unplug/plug the can bus, it is detected instantly, but the readings are mostly garbage.

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panicman xf2334 commented · Jan 31, 2023 at 04:45 PM

It was the same for me with that flip back. I set the inverter in the BMS with the same BMSMonitor Software as for the WNT, different connection Cable. Nothing else.

How is the CAN Packet Monitor looks like? Maybe it is because of the venus, did you tried that in an cerbo? I used it in MP2 GX directly.

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Answer 3 · 2023-02-03T09:06:42Z

jolilo answered · Feb 03, 2023 at 09:06 AM

hello panicman

great post

can you give us a diagram of the cable you made for the VE.CAN Side connection <-> DALY INTERFACE BOARD SIDE

is the base a straight or crossed rj45

Do you have a download link for v2.17!

I only found a 2.16

is the cable between the WNT and BMS supplied with the WNT

Cordially

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rasmussen commented · Feb 05, 2023 at 04:43 PM

https://diysolarforum.com/resources/dalybmsmonitor-v217beta2-to-set-up-inverter-protocol.310/

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panicman commented · Feb 06, 2023 at 01:55 PM

Base is an straight rj45, not supplied with the WNT:

VE.CAN Side <-> DALY INTERFACE BOARD SIDE
Green/white GND 3 - 3 GND green/white
Brown CAN-L 8 - 4 CAN-L blue
Brown/white CAN-H 7 - 5 CAN-H blue/white

https://diysolarforum.com/threads/daly-bms-make-communication-with-victron-energy-via-interface-board.49636/post-685618

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Answer 4 · 2023-02-06T18:12:45Z

jolilo answered · Feb 06, 2023 at 06:12 PM

Merci ! ,THANKS.

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Answer 5 · 2023-03-20T12:15:20Z

djdemond answered · Mar 20, 2023 at 12:15 PM

I managed to get it working with Daly Smart BMS, Interface WNT board, Mutliplus II and VenusOS.

I wrote it up here in case it helps:

https://community.victronenergy.com/questions/195318/guide-for-daly-bms-can-communication-with-venus-os.html

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Answer 6 · 2023-05-03T14:00:55Z

jochen-steini answered · May 03, 2023 at 02:00 PM

Ich kann zwar am PC das BMS auf Victron einstellen, aber leider nicht dauerhaft. Gibt es einen Trick?

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derrick thomas commented · May 03, 2023 at 03:47 PM

After you change the protocol did you click select?

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jochen-steini derrick thomas commented · May 04, 2023 at 06:15 AM

Mehrmaliges drücken auf "Select" und "Read" haben nichts bewirkt. Wenn ich die Daten erneut vom BMS lade, ist die Einstellung für Victron weg.

Auch kann ich nur die Daten direkt vom BMS ins Programm laden. Über das Interfaceboard geht es nicht.

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Answer 7 · 2023-05-23T17:43:10Z

adi-g-pv answered · May 23, 2023 at 05:43 PM

Hy great work i still trying to get it works for me but no succes. i have a question, have some of you get it work with cerbo gx original victron software? or do i have to flash

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panicman commented · Jun 12, 2023 at 06:54 AM

Yes, original GX Software, no problem. Do you set the right Victron/CAN protocol in the WNT? And did you change the Cable wiring as described above?

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Answer 8 · 2023-06-11T20:05:48Z

jochen-steini answered · Jun 11, 2023 at 08:05 PM

Bei mir hat es nun geklappt. Sehe das BMS im Dashboard und in der Geräteliste.

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Answer 9 · 2023-08-03T07:03:31Z

hechtimnetz answered · Aug 03, 2023 at 07:03 AM

Hi, does anybody manged to get 2 DIY Lifepo4 battery systems with daly to victron (cerbo)?

thanks

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samuel-lehmann commented · Oct 27, 2023 at 10:09 PM

Yes, but after two minutes it stops updating the value. After disconnect the cable, it works fine for next two minutes. SOC, voltage und min/max cell voltage is fine, but the current turn to negative, but single both are positive.

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Answer 10 · 2023-08-15T09:58:44Z

Silvio Franceschini answered · Aug 15, 2023 at 09:58 AM

Hello all, I ordered multiple Interface board from Daly with the notice that it needs to work with Victron.

After setting up the Victron communication protocol in BMS Monitor and do the wiring, it worked strait on the Cerbo GX CAN BMS port and after changing baud rate also on Can Port on CCGX.

I changed multiple Interface boards without any programming and it was working. So seams communication settings are stored in the BMS and not in the Interface board.

BUUUUT. The current reading is opposite as in the BMS Monitor / Bluetooth App. While discharging its shows positive value and while charging it shows negative value.
BMS Monitor and App show the correct values.

I have found a post where its suggested to change the "utils.py" (INVERT_CURRENT_MEASUREMENT = -1) file, but this was on a raspberry so no idea of how to doing this on Cerbo or CCGX.

Does anyone has the same problem and can give some advise?

Thanks a lot...

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rwwinter commented · Aug 23, 2023 at 12:05 PM

I have exactly the same problem. Have you been able to find a solution?

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Silvio Franceschini rwwinter commented · Aug 23, 2023 at 12:35 PM

Hey, not yet. Habe been on support chat with DALY BMS for hours. They can not belive it. So we try with another DALY BMS of a customer.

I had placed the Terminator, it can read all datas, just the current is pos / neg mixes.

Thanks

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Answer 11 · 2023-08-23T12:08:03Z

rwwinter answered · Aug 23, 2023 at 12:08 PM

Make sure you have plugged in the Terminator on the open CAN Port on the Voctron side... otherwise Daly BMS will not be found...

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