Victron Cerbo GX CAN interface & diyBMS

Using the diyBMS to communicate with Victron Cerbo GX devices and provide an end to end solution for battery management.
Patreon - Support This Project
www.patreon.com/StuartP
For help and support, visit the Open Energy Monitor forum at
community.openenergymonitor.org/c/hardware/diybms/53
Source code
github.com/stuartpittaway/diyBMSv4ESP32
Hardware and PCB designs
github.com/stuartpittaway/diyBMSv4

[@timkelley5018]

Stuart, this is looking great! Thank you again for all of your continuing hard work.

[@StuartPittaway]

My pleasure!

[@jbrown468]

Awesome, Stuart. Thank you for all the excellent work!

[@StuartPittaway]

No worries!

[@tiloalo]

Amazing work!

[@StuartPittaway]

Thank you! Cheers!

[@houseofancients]

wonderfull work stewart. canbus should be much universal between inverters, so this opens up some real possibilities. impressive !

[@StuartPittaway]

Many thanks!

[@DIYwithBatteries]

Nice video Sir 👍

[@StuartPittaway]

Thanks and welcome

[@herrcbaer4429]

Really great work! I will test it in a few days with 16s LiFePo4 230Ah, Cerbo GX, Quattro II 48/5000 (nearly the same as Multiplus II - only one more AC input for Genset) I will report my experience.

[@StuartPittaway]

Thanks

[@clint965]

very good, now im waiting for sma canbus support :)

[@StuartPittaway]

Do the sma devices have something similar to the cerbo controller?

[@clint965]

@@StuartPittaway im not sure, but i think not. the sunny island has a canbus rj45 port for external bms. if you need someone to test your controller firmware, i can do it.

[@niclasdahlgren3395]

Hello Stuart, great Video! How did you get the documentation from Victron to be able to integrate the can-features in the video?

[@StuartPittaway]

I asked them! It was emailed over to me

[@to93om]

Hey Stuart, just started following your work and it is really interesting! Currently I’m building a 16S bank and I’ll have a Cerbo, but now Im hesitant with Rec BMS, since they never answer. I’d be happy to integrate something like yours, would you give me some advice how to? Thanks so much!

[@StuartPittaway]

Hi - take a look at some of the earlier videos (they are a bit rough around the edges!) but it will give you a feel of the structure of the system and what you need.

[@chuxxsss]

Afternoon Stuart, still no power waiting one transistor not fitted by JLBPCB. O.k. do you have the new Lifepo4 battery circuit boards yet mate? Who would I talk to to get them made them please.

[@StuartPittaway]

No I've not built any LIFEPO4 boards yet - the existing 4.4 modules should support that voltage range okay though.

[@RobvanHaaren]

Great work Stuart! A large portion of the DIY powerwall community is moving to LFP prismatic cells. Any chance you can do a video on a 16s LFP implementation? This would probably boost your channel subscribers as well! Cheers, Rob

[@StuartPittaway]

I've also been looking at the LifePo4 cells - don't have any at the moment to video, have you brought some already? Looking for recommended suppliers.

[@flatfoot]

@@StuartPittaway Your work looks very impressive. Thank you. Re LiFePO4 cells it's a bit of a lottery. There are soooo many dodgy sellers polluting the scene with used cells

[@jlachapelle77]

@@StuartPittawayI built a 16S2P 280AH battery bank from Lifepo4 cells from Docan Power (China & US distribution). Awesome cell at a very affordable price. From the same supplier, I purchased 2 200A JBD 16S BMS (CAN port) which are terrific, and looking to hook to Curb GX. Would love to see a video on that.

[@StuartPittaway]

Rob I'm doing a series on lifepo4 install at the moment.

[@RobvanHaaren]

@@StuartPittaway Thanks! I purchased 20 EVE 280Ah LFP cells that are doing pretty well - despite having installed it with an inferior BMS (Daly 250A BMS)

[@raphaelgeorge2701]

Hello Stuart can the new controller firmware enable CANBus connection to monitoring platforms by other inverters aside from victron energy

[@The_Unobtainium]

same question here

[@allanlind676]

Stuart I have built a stack of 14S and 8P and hooked everything up to a Victron GX inverter. First thing i notice is that the data LEDs behave somewhat strange. They come on in sequence up to module 16 then there is a pause for a few seconds before the data continues around the loop. Just wondering is that is normal. Also received packets about 2/3 of sent packets. compiled 2021-12-06T15 running 9k6 baud.

[@StuartPittaway]

Yes thats normal, the cells are addressed in 16 blocks, so there will be a delay between these blocks.

[@wayne8113]

Thanks Stuart, What protocol are you using (2.0a) ?

[@StuartPittaway]

Not sure if the version, the protocol was sent to me by Victron and it's just known as BMS can protocol

[@wayne8113]

@@StuartPittaway Thanks for the reply, this canbus is going over my head a bit

[@buddhafragt9619]

hi Stuard, is the CAN protocol also compatible to Victron Venus GX?

[@StuartPittaway]

It should be, I don't have a device to test it with, so give it a go

[@allanlind676]

Stuart, I can’t remember if I have your email address but I recall you asking how I was progressing with the Nissan Leaf ver 4 boards. Anyway I finally took delivery of 49 gen 1 leaf modules and will now start to build a 7x7 48V stack. I have a Trinabess AC coupled inverter which I will attempt to couple the diybms to via Canbus. Now I discovered the Trinabess is compatible with Pylontech US2000 battery packs which in turn are compatible Victron. I have 2 US2000 packs next week so I can reverse engineer the Canbus protocol. But maybe your code will just work as it is. One way to find out I guess… Also I am working on a version of diyBMS for leaf with one huge PCB that bolts directly onto 7 stacked modules.

[@StuartPittaway]

Very interesting stuff Alan

[@allanlind676]

@@StuartPittaway I have completed design of the 7 module Leaf balancing boards, and had 20 boards manufactured. Now testing. I couldn’t get any comms going with the Trinabess. There is no documentation available on their protocols. I have purchased a Victron Multiplus-II GX 48V 5000VA inverter. Do you know if the DIYBMS controller can talk to this? Or will I also need the Cerbo GX?

[@StuartPittaway]

@@allanlind676 I've not personally tested that device, however if it has the GX hardware inside it should be okay

[@anthonyevans7911]

Hi Stuart / everyone. I have a built a battery pack using nissan leaf cells in a 3p7s configuration, v4.4 cel boards ad the latest touchscreen controller. I have also acquired a Soltaro AC coupled inverter, that sadly only works with their own battery via CANBUS. They will not give any canbus data to me saying its confidential. I`m going to try to connect the diybms to it to see how it reacts. Also, there is a BMS on the market now that has maybe 7 inverter canbus data built in, its called a SEPLOS, and in it it has a drop down menu to select what inverter you want the bms to comms with. If anyone wants t try to reverste engineer it to have our bms do the same, im more than happy buying one for the project. Sadlt my programming skills are zero, so cant contribute to the reverse ingineering side.

[@StuartPittaway]

I'm aware of the seplos boards, not used one myself.

[@WiLoW82]

Hi. It would be posible, the integration with inverstors of the Ingeteam brand??

[@StuartPittaway]

Not heard of that make. Are there any datasheet?

[@WiLoW82]

New is 1S STORAGE 1Play TL M (3-6kw)

[@WiLoW82]

@@StuartPittaway on your website ingeteam

[@sattiv6387]

@@StuartPittaway I also have an ingeteam inverter, it is a good device and very versatile, it can work with batteries from 40 volts to 450 volts.

[@richardbuehler9275]

Will the Cerbo GX talk with this meanwell battery charger. DBU-3200-48CAN

[@StuartPittaway]

Not at the moment

[@4444voort]

That thumbnail 🤣

[@StuartPittaway]

I couldn't resist!!

[@4444voort]

@@StuartPittaway although this question might sound stupid....this firmware is "only" to add the canbus for cerbo support? Not fix for the reboots when influxdb is enable?😇