This looks promising as a second life for Nissan Leaf cells. Thanks for sharing your project figuring out how to reconfigure the Leaf cells as a 48 volt battery for home energy storage.
Just grabbed one for my 15kwh setup. Saving a few bucks a day by shaving peak rates. Batrium with victron charger inverter is awesome, if a cell drops out , it will communicate to the victron
It could be good to stagger the bus cable connections to top and bottom cells, to keep current more equal within the modules. As is, the top modules have the lowest resistance path.
Please can you do an in-depth video on setting up the batrium bms??? I know there are lots of video's, but I would love to see everyone's perspective on it...Thank you
Yes id like a good bms for my leaf powerwall but im not sure what to buy and if its gonna be super expensive i might be better off selling the cells and buying more lifepo4. Any advice is greatly appreciated
You are talking about "active balancing" - but i think this is not what the given BMS is able to do with these longmons but these are rather passive balancers with a control bus ?!
Hi Dala, In January 2022 I purchased a 2013 LEAF (Hooray). I have noticed in winter (southern hemisphere) that the range I could get from a full charge was less than I got during warmer weather. Then I remembered that Finland gets cold. So my first question is have you noticed this effect in your LEAF? Second question. It is dawning on me the significance of the early LEAF not having temperature management on the battery. I know some people have retro fitted 40 kWh battery to these original 24kWh cars. Do you know of any attempts to retro fit temperature control into a LEAF battery pack? Is there much to be gained by attempting to do this? Your vids are very instructional and clearly describe what you are doing. Love them.
The BMS system looks like it's just a Battery Monitoring System ? How can you control individual cell charging with the current setup ? You could end up with a reverse charged cell or an over/under charged cell.
Hi Dala, fantastic work 👍I have almost the same setup but Batrium don't have any LeafMon's for 2 months 😔but they have recomended CellMate K9 instead I know this is not exactly the same as your setup but I was wondering if you could share your wiring diagram for the cells and your LongMon's etc please? Thanks Dala 😁
Hi Dala, how are the regulations in Finland for batteries connected to the "grid"? Does your inverter have ups functionality making the install more or less blackout-immune? Or is it one of those inverters that shut off regardless when the grid is down? I am from Sweden and have solar with ups functionality but have not yet heard of a resonable solution that fulfills the grid companys safety requirements.
Hej, this inverter shuts off right when grid goes down, to avoid backfeeding. But higher tier models exist that can isolate from grid with contactors, and run the entire house offgrid. Our electrical provider has a list of approved inverters, that fulfil the grid code requirements.
Hi, nice work, I've done the busbars myself on a drill press with a jig. Wasn't much fun, but when I did the second kit I realized how much easier tha your way for example. Anyway, is there any specific reason why you choose longmons as opposed to the specifically designed leafmons? A bit tidier and less hassle to secure them. Also I experienced some issue which was very likely caused by the comm cable extension, my one was in the middle of the pack. It seems to be no problem since I removed that. You mentioned you want the BMS to "work" with your inverter. I guess you referring to the CAN communication. What I noticed with my Sungrow Hybrid inverter, the parameters in the inverter are fixed, and lot more conservative than the Leaf batteries capability. Nice to have all the fancy features but the inverter itself does very good job in "other battery" mode, when the parameters are customisable. Hence the extension board in hand, adding emergency disconnect option is pretty easy. Looking forward to the coming videos.
Thanks Arpad! I wanted the longmons, since I will probably experiment with many different types of cells, these LEAF ones are just a starting point. So I didn't want to lock myself into the LEAF-formfactor! Thanks for following!
@@DalasEVRepair Another alterntive would be WatchMon-CORE + CellMake-K9. Should be cheaper. And less stuff, just cables with fuses going from teh CellMake to the cells. And I haven't figured out yet what I would need an expansion board for... 🙂
I have my leaf cells in 2 stacks. 12 per stack. I have them running a couple 24 volt inverters. They seem to be working great. Do you know how many amp hours 24 modules are? They are from a 2012 leaf that had 30 thousand miles when wrecked. I dont have a bms and i should have done the 48 volts but i was new to this and set them up as 24 volts. This seems strange but they seem to have most their capacity from 23.5 volts to 25 volts. Once they drop below23.5 they definitely dont have much left in them so running at 24 volts seems better than id first thought. Ive never had a bms but id love to have a good bms.
Arranged my Nissan cells 14S20P, made from 3 Nissan cars. Got a Batrium WM5 and I am not that pleased with it. It needs a windows computer, Mac&Linux only here, so had to buy a Win Laptop to do firmware updates. Cell balancing of the WM5 is of course way too little for a 72kWH pack and the WM has problems. It shows a high voltage when balancing and triggers shut off. Software error. So I bought a chinese balancer with BT, works well. Cells did not drift apart the last 3 years. Also Batrium do not offer MQTT to read data, you need other tools. With every firmware update they change the data list, so your MQTT reading tool needs an update. Wifi dropped very often from the Batrium with previous firmware versions. Next time I will look for a tool that just ready battery data and a separate balancer. Reading voltages and SoC must be 100% stable.
@@DalasEVRepair I am planning a new system, 400V inverters are now available, but batteries are SW locked, would choose a VW pack, they are easier to get here, if only someone could unlock them. Greetings from Germany and thank you for your videos :-)
Did you research other bms options when you chose bms? I'm building a 20 kwh battery myself and I'm looking for a suitable bms. I have considered 123SmartBMS, it would be nice to hear your opinion on this
![ON/OFF-GRID DIY Powerwall build [part2 - Victron Inverter]](http://i.ytimg.com/vi/yCo0QkNMqrs/mqdefault.jpg)
![ON/OFF-GRID DIY Powerwall build [part2 - Victron Inverter]](/img/tr.png)
![ON/OFF-GRID DIY Powerwall build [part0 - battery layout]](http://i.ytimg.com/vi/Yr7vzq8PW70/mqdefault.jpg)
Waiting patiently for my 24KwH leaf to reach ~15KwH capacity to do something like this. Thank you Dala (the great)!
This looks promising as a second life for Nissan Leaf cells. Thanks for sharing your project figuring out how to reconfigure the Leaf cells as a 48 volt battery for home energy storage.
Nice vid. Trust your cat to find the sunniest, warmest spot. I reckon cats are at the top level, of reincarnation.
Just grabbed one for my 15kwh setup. Saving a few bucks a day by shaving peak rates. Batrium with victron charger inverter is awesome, if a cell drops out , it will communicate to the victron
Nice job 👍
It could be good to stagger the bus cable connections to top and bottom cells, to keep current more equal within the modules. As is, the top modules have the lowest resistance path.
Good idea!
Please can you do an in-depth video on setting up the batrium bms??? I know there are lots of video's, but I would love to see everyone's perspective on it...Thank you
Wow. I just caught up with your recent videos and I am acutally doing this exact same thing for a friends off-grid house.
Feels good building something energy-independent 🙌
Hello friend, I watched your videos and my plan is to build a battery, but I want to know where to buy or where to buy the BMS from you.
Do you think a JKong BMS 150A 2A balancing current could do the job
Yes id like a good bms for my leaf powerwall but im not sure what to buy and if its gonna be super expensive i might be better off selling the cells and buying more lifepo4. Any advice is greatly appreciated
You are talking about "active balancing" - but i think this is not what the given BMS is able to do with these longmons but these are rather passive balancers with a control bus ?!
Hi Dala, In January 2022 I purchased a 2013 LEAF (Hooray). I have noticed in winter (southern hemisphere) that the range I could get from a full charge was less than I got during warmer weather.
Then I remembered that Finland gets cold.
So my first question is have you noticed this effect in your LEAF?
Second question. It is dawning on me the significance of the early LEAF not having temperature management on the battery. I know some people have retro fitted 40 kWh battery to these original 24kWh cars.
Do you know of any attempts to retro fit temperature control into a LEAF battery pack?
Is there much to be gained by attempting to do this?
Your vids are very instructional and clearly describe what you are doing. Love them.
Hi, I would recommend hopping over to the mynissanleaf.com discussion forum!
The BMS system looks like it's just a Battery Monitoring System ?
How can you control individual cell charging with the current setup ?
You could end up with a reverse charged cell or an over/under charged cell.
No risk, this BMS does balancing via resistors.
Hi Dala, fantastic work 👍I have almost the same setup but Batrium don't have any LeafMon's for 2 months 😔but they have recomended CellMate K9 instead
I know this is not exactly the same as your setup but I was wondering if you could share your wiring diagram for the cells and your LongMon's etc please?
Thanks Dala 😁
Is this BMS available to purchase?
Hi Dala, how are the regulations in Finland for batteries connected to the "grid"? Does your inverter have ups functionality making the install more or less blackout-immune? Or is it one of those inverters that shut off regardless when the grid is down? I am from Sweden and have solar with ups functionality but have not yet heard of a resonable solution that fulfills the grid companys safety requirements.
Hej, this inverter shuts off right when grid goes down, to avoid backfeeding. But higher tier models exist that can isolate from grid with contactors, and run the entire house offgrid. Our electrical provider has a list of approved inverters, that fulfil the grid code requirements.
Hi, nice work, I've done the busbars myself on a drill press with a jig. Wasn't much fun, but when I did the second kit I realized how much easier tha your way for example. Anyway, is there any specific reason why you choose longmons as opposed to the specifically designed leafmons? A bit tidier and less hassle to secure them. Also I experienced some issue which was very likely caused by the comm cable extension, my one was in the middle of the pack. It seems to be no problem since I removed that. You mentioned you want the BMS to "work" with your inverter. I guess you referring to the CAN communication. What I noticed with my Sungrow Hybrid inverter, the parameters in the inverter are fixed, and lot more conservative than the Leaf batteries capability. Nice to have all the fancy features but the inverter itself does very good job in "other battery" mode, when the parameters are customisable. Hence the extension board in hand, adding emergency disconnect option is pretty easy.
Looking forward to the coming videos.
Thanks Arpad! I wanted the longmons, since I will probably experiment with many different types of cells, these LEAF ones are just a starting point. So I didn't want to lock myself into the LEAF-formfactor! Thanks for following!
@@DalasEVRepair Another alterntive would be WatchMon-CORE + CellMake-K9. Should be cheaper. And less stuff, just cables with fuses going from teh CellMake to the cells.
And I haven't figured out yet what I would need an expansion board for... 🙂
I have my leaf cells in 2 stacks. 12 per stack. I have them running a couple 24 volt inverters. They seem to be working great. Do you know how many amp hours 24 modules are? They are from a 2012 leaf that had 30 thousand miles when wrecked. I dont have a bms and i should have done the 48 volts but i was new to this and set them up as 24 volts. This seems strange but they seem to have most their capacity from 23.5 volts to 25 volts. Once they drop below23.5 they definitely dont have much left in them so running at 24 volts seems better than id first thought. Ive never had a bms but id love to have a good bms.
Originally the modules were 500Wh. I would never dare to run without a BMS!
Informative video..
Hi Dala.I just don't understand, you have a gen24plus and 48v battery for this inverter(high voltage) or what's a plan? 🤔
This is a different site! We'll get back to Gen24 and Sun2000 later!
Arranged my Nissan cells 14S20P, made from 3 Nissan cars. Got a Batrium WM5 and I am not that pleased with it. It needs a windows computer, Mac&Linux only here, so had to buy a Win Laptop to do firmware updates. Cell balancing of the WM5 is of course way too little for a 72kWH pack and the WM has problems. It shows a high voltage when balancing and triggers shut off. Software error. So I bought a chinese balancer with BT, works well. Cells did not drift apart the last 3 years. Also Batrium do not offer MQTT to read data, you need other tools. With every firmware update they change the data list, so your MQTT reading tool needs an update. Wifi dropped very often from the Batrium with previous firmware versions. Next time I will look for a tool that just ready battery data and a separate balancer. Reading voltages and SoC must be 100% stable.
Yeah I would not go the Batrium route if I would start over. I would just use the entire pack as-is with 400V
@@DalasEVRepair I am planning a new system, 400V inverters are now available, but batteries are SW locked, would choose a VW pack, they are easier to get here, if only someone could unlock them. Greetings from Germany and thank you for your videos :-)
🤣🤣 what an intro 😺
For the stacks that have the reverse polarity would it be possible just to flip all the cells in the stack over?
Yes!
Did you research other bms options when you chose bms? I'm building a 20 kwh battery myself and I'm looking for a suitable bms. I have considered 123SmartBMS, it would be nice to hear your opinion on this
Yes, but I went with Batrium due to the broad inverter support. I'll run it with Victron gear, looks like the 123SmartBMS would work well also!
how does that battery bms perform the balancing? can it transfer energy from one cell to another?
@@tapanileinonen5049 This is passive balancing, check their wiki!
Can these BMS handle high voltages like 500v
It will become too expensive. You need 96 PCBs.
Is this charge when rate is cheap, then use while rate is high?
Yes it it possible to set that up 😁
@@DalasEVRepair I need to study this closer. Commercially available solutions so expensive
? Can I use that BMS if i do not have a Microsoft Windows operating system?
I mostly only use Android, then chrome, and in the closet is Linux....
You can use virtual systems to allow it to run on Linux or AppleOS. But software is Windows only for now!
Today wee are continue.. do not match with a PART1 ?!
Parts start at 0, all good programmers know this 😅
@@DalasEVRepair hmm, forgot that one.. and to many other channels starts at "1" 🙂
Kissa
😼