Trying to connect 2 different batteries via CAN to the Victron Cerbo.
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- čas přidán 23. 02. 2023
- I'm trying to connect two batteries via CAN communication to the Victron Cerbo GX. Is that possible at all? Well, to find out, I have to make a second Type A cable to read data via CAN from the BMS and get the information into the Cerbo. An easy task if you follow the correct colour coding of the cable! (which I didn't at the beginning). Quickly testing the cable connection and here comes the big moment...
Victron Type A cable pin-out:
www.victronenergy.com/live/ba...
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Andy Thanks for posting all this info, your videos have helped me 1) switch to Victron multiplus II, 2) get a "Raspi" and Venus os, 3) get an dual CAN hat board 4) wire my RS3450/100 and smartshunt with diy cables to the Raspi,. Now I have my 2 multiplus (split phase), my RS450/1000, my smartshunt and 2 Seplos 304ah batteries all connected to the "Rasp-p--pi"
You need an RJ-45 crimper and some plugs - more tools for the garage! ;)
Also put a lan tester on the list..
Have an RJ-45 here, Andy, only 1600 km apart. lol
Noooo, I haven't used such tools for 30 years. It would be a bad investment.
@@OffGridGarageAustraliaYou do go to impressive lengths to not use such a tool, so I'm not surprised you haven't used one in decades.
Sometimes I use toolless RJ-45 connectors (when I can't find my crimp tool). When I showed them to an electrician who was installing my EV charger he was impressed, he said he'd go and buy some.
Perhaps a few of them for your collection, just I'm case?
Astrein gefummelt! 👌 Man kann nicht immer gewinnen, aber oft ist halt auch der Weg das Ziel! Weiter so!
An interesting exploratory video Andy. I look forward to seeing the video about how to properly crimp an end on the Cat5 and program the CAN bus 😉
Thanks. Crimping cables is a major concern for some, it seems😁
Not sure if there is a place where I can change the CAN ID on either BMS. They are supposed to talk to only one inverter.
I was freaking out when he started, lol... I was like, this isn't going to end well. Priceless. Love ya Andy!
Very interesting video. The Cerbo OS should be the reasons for showing alternating data @ the screen.
Good Luck 😀👍
Andy thanks for everything! It would be really interesting if you get different ALL IN ONE INVERTERS(EG4, LV6548) and connect them to your solar panels / battery and see how they perform.
But I'm off-grid, so these hybrid inverters won't work as intended. Same with the Multiplus I have. It will probably never see the grid... and some of the inverters, I cannot even get down here, they are US only.
Thank you! had no idea the cable ends were different.
All CAN devices must have different adresses. There are two same.
Nothing I can seem to change anywhere...
@@OffGridGarageAustralia Change Seplos's addres
Thanks will test this had the same result as Andy with Pylontech an BYD
Thanks for this Testing and teaching me to make a Type a cable
No problem. A bit dodgy but it works and gets the message across...
Great use of old hard drive magnets.
I've got hundreds of them (almost) and use them all across my workbench.
Thanks fort the vid !
It works if you plug the second BMS on the VE CAN port (not BMS Can) and then configure it to 500 kbits/sec on the services parameters of the cerbo GX. Then you'll see the two bms in the configuration.
Ah, great, I have the Lynx shunt plugged in there but will try that...
I now have more than 2 CAN batteries though, so another solution need to be found.
Each CAN device needs a unique ID. You had a table a past video for dips switch settings to CAN-ID. Make them all unique and they should all show up without conflict. The Cerbo ID will be unique too. The cerbo should be doing a broadcast to see whats on the bus. Each will answer with its ID. The first one that answered probably populated the static flields including name. Daisy chain them all together and terminate the ends, which means the terminators go on the unused CAN port. The terminators will require the correct wiring which will be different from the cerbo termination. The cables from BMS to BMS will also probably have to different, I would guess straight through so a standard CAT5/6 cable would probably do. Also you could possibly use CAN for the slave BMS's too instead of needing RS485 between the BMS's. But then the master BMS may talk to the other BMS's on the other batttery too. YMMV since I havent got any batteries yet, but I have developed with CAN before.
I think the DIP switches are just for telling the BMS how many slaves are connected? Usually there is only one CAN BMS in the system so the ID does not change.
@@OffGridGarageAustraliai think too, that you can change the seoplus can id
On one battery dip switch 5 on, on other battery dip switch 6 on
Or if you can't change the id of the second battery, on the seplos battery only dip switch 6 on
There is only ne CAN connection per battery, the other batteries in parallel are communicating through RS485. That's what the switches are for. to address the RS485, not CAN.
Color coding of LAN cables are such due historical reasons. In 10Mbps system only 2 pairs were used blue & orange and based of telco color coding system those are two first pair of colors. Next then are green, brown and grey. Pairs from 6-10 are the same but with black second wire instead of white
If you buy a crimp tool, get the ends that allow you to poke the wires all the way through. They're easier to work with in my humble opinion.
If you do it on a regular base, yes, absolutely.
great video.. as always
Thanks a lot
Andy, the white/blue cable, is the negative cable for the blue cable or earth. It is twisted to drop noise distortion by about 20 db. Morning for beautiful sunny Victoria.
Yeah, something like that. Thanks for the explanation.
Sunny up here as well, already 40A outside.
I love the use of your Hard drive magnets to hang your tools! I'm going to do the same thing if you don't have it already trademarked! Love the video! PS... Get a ethernet plug crimper!
No trademark on that feature 😄 Go all in, it works great and they even hold my small sledgehammer with 5kg.
I haven't crimped a ethernet cable and plug for the last 20 years, I think, so a tool for that seems excessive 😉
Thanks Andy
Thank you, Wayne.
Tool explosion :) You get that even with small jobs.
Oh, yes, don't tell me...
Very interesting result, and still worth doing. It's great the Victron hardware was trying to make sense of it, and displaying alternate parameters. How good is that? Fantastic, without damage.
Did you just assume the Canbus socket pin-assignment on second battery, was identical to the original did you? I haven't watched your video of that battery addition, but will. So many possibilities with what's available today.
Thumbs up 👍 After dark. All wired up
Another late night show!
nice!!
Good Afternoon!
Good Morning!
Andy, I noticed in the Cerbo setup that there is an option for 'Automatic' in Battery Monitor which may or may not work. André in Sydney
This only selects either the shunt or the BMS as the battery monitor automatically, whatever the Cerbo decides is better.
I used the RJ45 clipper for such a reason a few days ago. Creating your cables, A or B type is a much easier way. Don't you have such an instrument in your off-grid garage, Andy?)
Totally unrelated to the content of this video, but my grid tied garage system is now live, and we're powering the entire house through a Quattro 48/10000. Sparky's connected the AC on Wednesday, just a shame we have poor weather in my part of the UK at the moment. As I said previously you're video's have spurred me on and been invaluable to me, thanks. Only have one 16S EVE 280 battery, but will be adding another once funds allow.
Congratulations! That is great to hear. Always good when people get inspired and start their own projects. How big is your solar? Maybe you should invest in upgrading the production first. That made certainly a huge difference to my system.
@@OffGridGarageAustralia Hi Andy, I've had 4kw system on my house roof with no battery since 2015, this is a Feed in Tariff system (FITS), so we get paid for what we generate. I've added an additional twelve 395w panels on my double garage, this is the Victron system. So I have a total of 9.74kw of PV, and don't really have space for more panels, I'll either need to get creative, or alter the FITS system, and then the payments would be prorated, I suspect this option will get expensive. I'll see how it goes, we are grid tied, with whole house backup, both PV systems carry on working in the event of a grid failure. It would only be late October to March roughly that we'd really need more generation, so I don't think the additional cost would be worth it. I will be adding another battery, I'm using the EVE 280Ah cells with twin bolt terminals.
@@TheRonskiman Maybe run the single battery for a year and see how it goes before investing into a 2nd bank. If you haven;t got enough generation, more storage will look good but won't make a big difference. This is from my experience with the old DIY solar and three battery banks in parallel.
Nice setup anyway, I hope you get some good money for your green energy you're exporting. We're down to 3-7c/kWh down here and it will go further downhill in the future.
@@OffGridGarageAustralia The system really needs at least two batteries, I have space for four, but two should be enough. The Quattro can draw around 160 amps, and charge at up to 140 amps, and thats better spread over two batteries. One battery barely lasts through the night as well, which will be worse in the winter. We also have some good tariffs starting to appear now, Octopus Flux pays between £0.25 and £0.40 per unit exported, and between 02:00 and 05:00 I can import at £0.21, and between 16:00 to 19:00 export for £0.40, so money to be made. Come winter a different tariff might suite better for cheap off peak electric, so will need two batteries for that.
@@TheRonskiman That sounds like some great opportunities are coming up. Are you allowed to export energy from your battery to the grid? I'm not sure this is a thing down here and is allowed.
Hi Andy, I came accross your video. I'm not sure if it is still relevant or has been fixed already. But I've managed to connect 2 interface boards (Green Daly with red dip switches) to Cerbo GX and have them both showing up. Basically You have to activate VE.CAN 500Kb/s and BMS.CAN 500KB/s in Services. Both Green boards set to Dip1 and not connected to eachother at all - otherwise they will clash.
Then One green board has to be connected to VE.CAN port and the second to BMS.CAN ports and Important: both terminated. Than in Victron you will get 2 x batteries under different IDs showing up.
Cheers
If you want to connect 2 separate Batteries to the Cerbo you have to set the VE.Can Port to Can Bus speed. Then you have 2 Batteries and can kind of combine them with The BatteryAgregator.
Could you explain it better to me please? Thanks
@@AndreaFurlan-ro8cw So if you have two batteries with CAN but the can’t communicate with each other you plug one into the BMS CAN Port on the Cerbo and the other one into the VE CAN Port. Then you go into the Cerbo Settings-> Services-> VE.Can Port and select the CAN-bus profile to CAN-bus BMS (500kbit/s). Hope that helps
Hi Andy
I've been following your videos for a very long time. Since this is about the connection of batteries to the Cerbo Gx, I have a question because I've been looking for a possibility on the net for a week without success. Is it possible to connect a JK-BMS to the Cerbo Gx? If this is possible, how does it work? Great video. Keep it up.
Hi Andy! Du kannst die CAN-ID mit den DIP-Schaltern verändern, dann sollten Beide angezeigt werden.
I think they just tell the BMS how many slaves are connected. Usually there is only one CAN connection from a BMS so the ID may be fixed programmed.
@@OffGridGarageAustralia Da ich ein zweites Seplos BMS aus der gleichen Lieferung da hatte, habe ich diese nun an eine Batterie und dem Raspberry mit Venus OS und dual CAN Adapter angeschlossen. Das Ergebnis war unerwartet....Das zweite BMS meldet sich als "LG resu Battery" und wird in der Geräteliste angezeigt. Ich kann mir das auch nicht erklären...
SHEnergie hat die Poduktkennung B007 und die LG kommt mit der Produktkennung B004
@@lerrypage Den Namen kann man ja aendern. Die BMS werden immer als irgenwas erkannt.
Andy, see if you get a different/better result if you change the Device Instance (Settings > Services > VE.Can or BMS-Can > Devices > [one of the Seplos BMSs] > Device Instance to 1 and leave the other BMS at 0 (ignore the warning).
Thanks for the tip. I just checked and I can only set the Unique Identity Number under the VE.CAN function (the shunt, other Victron devices with CAN port...) but nothing to set under the BMS-CAN ports option. It only shows the communication but nothing to change or set here.
@@OffGridGarageAustralia Ah pity. Seems like this is not supported for CAN-bus BMS (500kbit/s). Maybe the VE.Can & CAN-bus BMS 250lbit/s profile, provided the Seplos BMS supports 250kbit/s, but that's not supported for the BMS-Can port...
Numerous custom cables just use CAT-5, and if they are smart they just use a straight-through configuration so its compatible with gigabit ethernet (also straight-through). But as you have found, a lot of random projects are still using pin swaps and other garbage that requires custom cabling instead of simply using "gigabit ethernet" (straight-through) cabling.
--
Modern gigabit ethernet cables are basically straight-through, with only pair requirements. So the position of each color/striped-same-color pair is important, because it represents a differential pair, but the actual color selected for each pair is not important... just as long as the same color selections are used on both ends of the cable.
The two different 'standards' just select different colors for the pairs in each paired position. I'm sure that's a bit confusing. Both standards are still 'straight through' and both still use color/striped-same-color pairs to the same pin pairs (just ordering the colors differently). There is a lot of cruft in the standard because it covers 40+ years of phone, T1, and ethernet evolution.
I love your content. But, for my money, I'm just purchasing a Batrium WatchMon Core and some CellMate-K9's.
Hi Andy, thanks for all your videos.
You are maybe seeing same as you did with RS485 communication. I think BMS are writing data to CAN-bus using same CAN-id, then it is a bit of a coin flip on witch BMS data is shown last BMS to write to CAN-bus before Cerbo reads from CAN-bus. I have seen similar things when programming control systems. See if there is a possibility to change CAN-id on one of the BMS and of cause don’t use the Cerbo CAN-id.
Ah, right, thanks for the explanation. I'm not aware of having seen a CAN ID in any of the BMS which can be changed. But that's a good point!
@Off-Grid Garage are the seplos dip switches setting the CanBus ID?
When things start to get to complicated the fun goes away and the possibility of problems increase
But we are far away from that, so it's all good...
Is the Baude rate of the battery the same as Victron and is the Victron of the type that you can change the Baude rate if one of the RJ45?
Yes and yes.
The baud rate for for both BMS is the same, so I thought I'll give it a go...
I'm looking to ad an additional 2x DIY 15kwh battery modules to my system and want to monitor them all ... did you figure out if the cerbo GX can do it? don't want to buy twice ... love the channel bless you my friend
Hello, I have a JK B2A20S20P with can/485 and a Pylontech 2000C.
The 2000C is working perfect on my cerbo bms port. What shall i do with the JK B2A20S20P to connect it with my cerbo gx? Thx
hello I follow you from France I watch all your videos thank you thanks to you I have a great installation, I have a multiplus and a smart bms jbd I wanted to know if it is a type A or B can to communicate with the cerbo thank you very much
Good evening friend, I've been watching yours because it's a good video to acquire knowledge, but I had a doubt about an American standard, which talks about grounding the negative post of the battery of the off grid solar system, with your experience in off grid solar energy for What is this grounding connection to the battery's negative post, thank you and sorry if there are any writing errors,
Not sure what standard this is, but usually you ground the negative of your battery if you are in a vehicle, either RV or boat. If stationary, you don't have to, but I'm not familiar will all the electrical codes around the globe.
Hi Andy, not sure if you'll see this comment being an old video, but I've just figured out how to add two BMS's over CAN, even if they share the same address. Plug the second BMS into the VE. Can port (Third ethernet port from the left) and then in the Cerbo GX change 'Settings > Services > VE.Can port > Can-bus profile' to 'CAN-bus BMS (500 kbit/s)'. Not sure whether this makes a difference or not, but one is connected via a Victron Type A Can cable, and the other a Type B. Each BMS and their data are accessible via Node Red, however only the active BMS (the one being used to control the system) is shown in VRM Portal. I'm connecting two battery banks and monitoring their status using Node Red & MQTT so being able to have both banks available on the same Cerbo and same instance of Node Red is invaluable (to me).
Just to add after playing around a little. Whichever BMS is plugged in first seems to get priority. Then if the primary BMS is unplugged the second BMS automatically takes control (is set as the Battery Monitor). If the primary BMS is plugged back in it does not automatically regain control, the secondary BMS maintains control until it is unplugged for more than a few seconds. Also the two BMS's aren't distinguishable between each other in the menu to select the default battery monitor, even though they do each show separately in the main Cerbo GX menu. Would be great to see a follow up video to see exactly what's going on.
Thanks Dan. That may work with two BMS. The issue here is the BMS don't know anything about each other so won't report a conclusive cell difference or temperature. As you said, some Node Red magic may be necessary.
Will the automatic setting work?
No. This just selects the best device and sets it as battery monitor in the Victron system. The Cerbo decides which one to set, either the BMS or the Shunt.
Can you test it with 2 shunts connected on usb?
Did you by any chance switch the CAN bus ID on one of the BMSs?
That does sound like one way to bork it, two devices with the same ID on the same bus.
If you point me to the settings in the Seplos BMS, I'll have a look. I'm not aware of such an ID which can be changed and I thought I have explored pretty much all options with the Seplos BMS. Nothing in the other BMS to set either.
You could use the empty space in the VRM to show the MultiPlus. But in the test system you do not have one connected jet.
Ah, right, I never had a look into this function in the Off-Grid garage console. I have now turned it on but it actually shows the same as the AC Loads, so not much gain.
But thanks for the tip, good to know...
I was able to get both of my Overkill BMSs plugged into my Cerbo but Victron doesn't make it easy.
They assume if you're plugging in BMSs to Cerbo you want the BMSs to control the system. Which is frustrating because I just want to use Cerbo to datalog my BMSs and use the MPPTs and BMV to control the system.
Was this via CAN as well or did you use RS485 to USB converters? We have done that test and could connect 2 different BMSes to the Victron system.
Do you have same communication speed on both Can? VE can and Can BMS?
Yes, 500kB/s
@@OffGridGarageAustraliaI realized this as issue when tried to connect Smartsolar via can and seplos. Smartsolar needed 1000 kbps
Haven't you got an rj45 crimper to terminate properly it makes a lot neater, reliable and long lasting job than splicing. It's probably a quicker and easier job than cutting , soldering and heat shrinking too. They aren't expensive and you'll find they are needed semi often
No, I haven't got one. The last time I did this was in my apprenticeship in the 80s.
You legit did surgery 🙌🏽🔋
A bit like it, yes😂
Forgive Andy' Im old geyser, with cerbos blue plugs equal first and las termination point from cerbo to first batt then first batt to seplos then final term point ?. Any good?
Each BMS has only one CAN port, so they must be the end point on both sides.
@@OffGridGarageAustralia Thanks for replying, Love your Channel. Making can port work for batteries other than Victron Really Cool, Best of Luck in Future.
did you try on one on BMS-Can and one on VE.Can?
VE.CAN won't work. This is just for Victron gear.
Heya that would be nice if it would tup op on the display
Just out of curiosity, what is the use of having a BMS connected to the Victron Cerbo if it is not going to control the charging current of the Victron MPPTs.
It still reports the data and alarms to Victron. at the moment it's nothing more than a reporting tool but with some Node Red magic you can doo some pretty cool things.
A battery (and its BMS) has more data to provide to a Victron setup (e.g., to the Victron MPPT) vs. the Victron smartshunt, which has limited data. Both BMS and Smartshunt show up as battery monitors, and the cerbo gx allows the user to select either of the battery monitors (or automatic) in order to feed its data to the Victron MPPT. The idea is to use the battery (BMS) instead of the smartshunt because it will be more accurate and will have more data (e.g., individual cell voltages).
@@majid_us I totally agree with the more data part. But we need to consider that following scenario where cells are not perfectly balanced and the state of charge is nearing the 95%. The BMS should reduce the charging current coming from the Victron.
@@OffGridGarageAustralia Andy, awaiting anxiously for a Node Red vid.... The beer is ready for the occasion.
@@salimnaufal1779 Yeah, me too😁 I think we will be coming closer to that actually and will dive into the Node Red opportunities.
oh my!
Hi
My Seplos Bms lcd isn’t working. Looks like I’m getting Bluetooth signal but no success in connecting.
I can still connect to my laptop with the cable. Please help
I think there is a function switch in the PC software to turn the display on and off. Check that.
@@OffGridGarageAustralia it’s turned on. I’ve contacted the supplier and they are sending me a new lcd. Hopefully that will fix the issue. The display was working on the first day and the next day it stopped working
i want make a 4 leadacid battery battery 48 volt balancer or bms can you make it
That already exist. An active balancer for lead acid batteries with 48V. s.click.aliexpress.com/e/_DBKvtBX
This Andy always messing up 😂
I know, right!?😁
Did you get this resolved with the 2 different batteries? I will be in a similar situation soon myself... I currently have 4 Pylontech US5000 but think it should double the storage... Option A) stick in another 4 US5000. Option B) slaughter the Nissan Leaf outside and MacGyver a 48 V Battery from the remains...
This cannot be resolved. There is only one BMS which can be the point of truth. Two batteries or more in parallel need a BMS with communication ports like the Seplos, Pace of the new JK BMS coming soon.
Same can Id change dip or make series can and go from can to can to servo
I don't think the DIP are changing the CAN ID. They just tell the BMS how many slaves are connected, I believe.
Bonjour, j'ai les mêmes résultats avec 2 bms jk et convertisseur usb rs485, victron devrait résoudre ce problème c'est une fonctionnalité importante. Merci
Maybe it is reading each battery and cycling between the two...
It has something to do with the CAN ID...
💙👊😎
number 3 is actually orange white so just swapping the two wire of the pair around (watched up to 5:36)
but you seem to realize that later in the video
the weird colorscheme makes sense with analouge telephone wiring as the middle pair would be La and Lb
Hina batteries in China supplying Sodium ion batteries to the EV market. Yields 140Wh per kg.
Price is not interesting and will take a many years until we find something better than LiFePO4.
Dear Friend , We can use different type Battery (Li-Iron and Lifepo4) in parallel in same invertor , If you can provide a video for it
I did that. It works but now 100% correctly. Batteries have different chemistry and charge/discharge at different rate. So you will not have clear understanding where they are charge wise. When now is fully charged, the other is only starting to charge, etc. I had LIFEPO4 and LiNM in parallel. it works but I don't like it. So I bought 2 more lifepo4 batteries and will sell liNM battery.
I had lifepo4 16S + 14S LiNM in parallel. voltage is close, and you can use them that way. But they are not charge/discharge sumiltaneously because of different charge/discharge curve
🐸🐸🐸
🦘🦘🦘
Notice the Lynx Shunt is way off too. Not just me then. Seriously regret buying that overpriced fuse holder now.
In my case, that is maybe because I connected a second battery to the system to charge it up. The Seplos battery is full, the other is 50% full, the shunt is confused. But, yeah, the Lynx shunt is my least favourite device from Victron so far.
Same..
(To Pedro above)
Hallo Andy, kennst du schon das BSC Projekt? Ein ESP32 kombiniert mehrere BMS zu einem CANbus und stellt dazu noch alle Daten per MQTT bereit.
Never heard of it. Sounds complicated...
@@OffGridGarageAustralia
Very easy to use, but needs DIY hardware.
It is created by shining-man and called bsc_fw.
Sorry, YT algorithm dosnt like the name of the well known software developer webpage, where you can find the discription. Try to search for the keywords above.
@@OffGridGarageAustralia
The webpage is gi th ub
Can you post more info (link) to this project ?
You can use raspberryPi for connection to eacht BMS self, and monitoring each battery pack solo, and smart shunt you can use as master, for monitoring and managment to charging :P You can use the oldest raspberryPi (1st.edition works well, for eatch BMS = one raspberry) This is only one way, how to monitor diferent BMSs in Victron solution... :)
OK, no idea how to do that. That's probably something for yet another channel 😁
@@OffGridGarageAustralia It's very simple, one raspberryPi (with venusOS) is used for each battery pack (BMS) and it doesn't matter if it is communicates via RS485 or Can. This will be added as a new installation (in VRM), so you will have one installation for each batteryPack. The important thing is the common voltage of all battery packs, since it will be on the shared busbar and it is used for one common system. The main management regarding charging and discharging is handled exactly the same way as your solution (powerwall2). In any case, the system will not be controlled from the BMS by the battery, but by the smartShunt. It is practically the same as you have in your powerWall 2, with the difference that you will have the monitoring of specific batteries available under VRM. Yes, it is a bit annoying that the monitoring will be for each solo installation = for each battery (BMS). This is simply a system (venusOs) limitation, but this is a workaround if you want to monitor different batteries and their status.
Simple easy :D
I also struggled with how to monitor two or more BMS. This solution works, I understand it won't suit everyone, but I haven't found a solution other than at least monitoring on anothers BMS. The disadvantage or advantage, that's the point of view, is that the BMS is not the master and it can't be, as long as each BMS communicates at a different address :)
@@jurajnikolov4219 OK, I would not call this simple. The hardest part may be to get any Pis at the moment. They are sold out everywhere for well over a year...
I think the benefit of showing data from all BMSes is very small in comparison to the setup. The goal is still the BMS controlling the system.
@@OffGridGarageAustralia 1) as I wrote, just use "raspberry Pi of the first generation". You can get it for decent money.
2) venusOS does not support the connection of several BMS and it is not possible to pick, that this is the master and the others are slaves (that is, yes, if they know communicate with each other and one of them will be the master [Pylontech, etc.]) The problem is that the Chines comrades do not use a common table address for individual status values, seplos has a different address than JK and so on. So they can't talk to each other :)
3) "Louis van der Walt" wanted to make a driver that would allow two or more BMS to be connected, I don't know if he finished it. If so, would be great, but I don't expect that it will solve the communication of different types of BMS :) from the same vendor and the same type OK maybe Yes :)
4) when you think about it?
Do you need management through BMS?
Your solution, PW2, is proof that it is not.
Does PW2 allow you to monitor the battery status in more detail via VRM? Not.
It is necessary ? For me, yes, as long as I can receive alarm notifications of states read from BMS through monitoring via VRM. That I see as great.
Personally, I don't care if the MPPT or MPII Charger is controlled by BMS or by data from SmartShunt (set via Mppt+MPII), the result is the same.
If something goes wrong in system, BMS, should be the last safty instance :)
5) I understand that you want management through BMS : )
But above I explained why it won't be possible...
I won't convince you if you don't want save youre time and money :P
Only if you want and can to modify OS Venus :P Then OK :P
@@jurajnikolov4219 I fully agree with you here. Communication is not necessary (as Battery#2 proves) but alarms would be nice to show in VRM and act on it through Node Red. That should be possible with Kevin's serial drivers as I have tested. It can show several BMS and the alarms will be passed through to Victron.
That is maybe all we need.
I'm just testing here what benefits comms bring to the table as many wanted me to test that. So far, I must say, it is not worth it. The MPPTs work well without external control. Maybe even better considering they now do proper absorption and float...
Do you know that can can?
Absolutely 😂 I made a video: Yes, we CAN!
czcams.com/video/pus6zcImbf0/video.html
Thank you for all your video's!
Hello down under
👋
I don't think this was a fail. There must be a missing step. The cerbo was reading the info for both bms'. It just didn't have the name of the 2nd bms. It would only be a fail if the cerbo didn't recognize the 2nd bms info or anything. This is just half complete and you did prove the victron system does have some basic plug'n'play functionality to it. Pretty sure you'll figure it out. Just have a spat🍺 and do some reading!😁👍
Yeah, it seems like there is more to it. Need to find where I can change the IDs for the BMS and it should work then. If this is not hardwired for each BMS...
@@OffGridGarageAustralia try plugging in just the new bms and setting it up like you did for the seplos bms. Maybe that would work? Worth a shot
I hate crimping RJ45 cables, that's for sure.
It gets easier after 35 years..
you just need to buy the right plugs and its verry easy...
Sorry Andy but cutting a twisted pair and rejoining one of the conductors to a different twisted pair defeats the object of noise protection. are you sure about that ? 😍
It is for a CANbus at low bitrate and only about two meters long. What amount of noise do you expect?
@@Juergen_Miessmer Any inductive current from the AC environment I would say as well as pulsing current on the adjacent lines. Can Bus is not much different from RS 485 but duplex hence a more intense amount of signals. Btw, I don't see how the low baud rate would positively affect the noise 🤔
No problem with this cable. I have it connected to the QSO battery for a few days now and it works a treat. Even it is very close to AC and also the inverter. I don't even use a terminator atm...
Like# 269
Plug the second battery into the VE-CAN at 250K. then both appear..
But both have 500kB/s ...
@Off-Grid Garage the ve-can bus can be run at 500k.. or the battery may be able to run at 250k.
Settings/services/ve.can port/can-bus profile on the cerbo.
If only sending a photo were possible..
But been running stabely for a couple of months.
I have two BSL batteries connected with RJ45 per spec. One discharges at a different rate. I tried what you tried I. The video as well but still get weird results.
Will changing a can port to 250kb work? Who else has tried this?
The cat t need to go visit the channels
I’m so disappointed in you for not having a CAT-5 cable crimper… you should be ashamed of yourself… just kidding of course, nice job cludging the cable together.
Personally I’d say it was partially successful because assuming both batteries report accurately the fact that the GUI does show bot charge levels provides value. The big question is what does it do to the historical and real-time charts/reports ?
Can you change the Baud rate on one of the BMS’s? If so it would also be interesting to see if that makes the Cerbo show both independently?
Now go get a proper CAT-5 crimper and cable ends to round out the plethora of tools and parts you have! Again kidding, it was probably a valuable demonstration of how to DIY it for people who don’t have the right tool and don’t understand how to properly go through the frequently frustrating process of holding all 8 wires in place while doing the crimp, assuming the tools haven’t improved in the 10 or so years since I last had to do it.
Hahaha, I never owned a crimper for CAT cables. The last one I did was maybe 20 years ago. Since then, everything was pre-configured.
@@OffGridGarageAustralia Yeah it’s not something people normally do. I setup a network for a company I managed and have the tools because of it but also setup a few software labs for the corp i later worked at and managed a qa team.
From one IT guy to another(just have to give you some crap)....Andy, thought you do IT as your main job. Must be more software related and not networking which would explain you didn't know about network cable. Also, use crimp connects next to instead of soldering (but thanks for using the US pronouseation "soddering"). Mechanical connections are better in this use case. Love your channel, because of you, I have something like your SPAT setup. I compare my 1.3k panel against you 1.5k.
Soldering works well for low current connections.
That was only a test cable for this video.
Well, I knew about the 586A and B standard just haven't used it for the last 20 years or so. I could have made the perfect video but thought I leave the fail in there so other people don't think I'm a Guru and get it all right everytime😄
Nice try 🤣🤣😛
It was a quick one, 50% chance of success...
no more seplos pleas 🤮
Totally nonsense this test!
So is this comment.