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Here is a teaser for you all..... It does require one of the valence bms which is another long post. I've written a windows service that communicates to the valence bms through canbus. The service then uploads all of the data to an influxdb database for grafana and a mobile android app.

Yeah..... So I pulled a late night scraping through the code last night and read through almost all of the code. It may already be known here, but first thing I found that you can enable on the 1212 without modification gets you the calibration tab and the ability to change all of the preset...

Off topic: I decompiled the 1212 exe and noticed that it has 7 methods for balencing. One for all cells and then one for each cell 1-6. Seems like it takes simple Boolean values for on/off. If I get some time I may convert the decompile into a visual studio project and add some buttons to...

Hello everyone. I have completed building out a method to use the Valence HV bms and collect all of its data with some custom software. This software uploads the canbus data into a database that is then accessible via pre-built web page dashboard and mobile application for Android. I want...

I don't have a ton of time tonight to answer all of your questions, ill try and circle back tomorrow..... I'll be honest, get a genuine HV valence BMS from eBay and we can help you reprogram it. You'll just need a buck booster to run it at the high voltage it requires to turn on. It can work...

Here are all of the comm functions in the software: Public Function BalanceReadReturn(ByVal Buffer As Object) As Boolean Line 998: Public Function BalanceReadSend() As Byte() Line 1008: Public Function BatteryBalanceReturn(ByVal Buffer As Object) As Boolean Line...

To the others out there who would like to connect to the BMS through CAN, purchase the following canbus adapter. It works out of the box with the valence canbus software. https://canusbshop.com/index.php?route=product/product&product_id=51

Well, did some decompiling today and searching through the bms software. I think I figured out the proper usb can bus adapter that will work with the BMS. Another valence user and I placed an order for the adapter tonight and I should hopefully be able to verify in the next week or so. Kevin

Yes, HV valence bms and everything works perfectly. I'm using 2 contactors which are controlled by the bms. One for precharge and the other for low/hi voltage.

I was able to convert to a project successfully, and two key strokes to enable the battery tab. It still however does not work; I'm getting communication errors when I try and run it. What I can guess is one of two things, either the board doesn't support external commands to balance or the...

Hmm interesting thought on continuous errors causing possible bms disconnect of the bank. I only have 3 that have this problem of 20. You're right, I have seen it once or twice on some batteries over long term connections which doesn't seem to be a concern. Three do it continuously every 2...

This is all theory!!!! How to enable cell balancing outside of the software: The common Battery Monitoring 1212 software just monitors the Battery Board and can change the ID, nothing more. My theory is that you would need to have something that sends the wake modbus command to the Battery...

Hi all. I'm new to the thread here, but have been following for a few weeks. I've recently acquired a large number of these batteries and I'd like to get experience and opinion of others on charging. I've done some testing using two chargers and always connecting the battery to the valence...

Hello everyone, I wanted to share some pictures of my powerwall build. I'll be adding a few more pictures of the mobile application I built to monitor this setup. Overall this project was a few months in the making and went very smooth. The only advice I can provide is to not rush and build...

I'm really starting to think that inter-battery balencing is completely controlled by the board itself and that it does not take external input on that matter (besides monitoring). However I think it's the BMS that controls the intra battery balencing. I haven't started playing with the BMS...

I may by early next year have this moved to a raspberry pi zero with a canbus hat. Personally, I prefer using the valence bms since it was designed to work with these batteries. The cost of a valence hv bms in relation to reverse engineering the 485 plus the risk of missing something isn't...

Thanks Travis! This does ease my mind. To think I was going to grab a bench charger to pull that cell up those few mv. I think your reply will keep my OCD at Bay. Only other thing I've noticed that I haven't seen here on the forums: Most batteries I have keep communication, some show the...

Really simple solution. Please see this link Here

Yes. Please PM me.

It would be great to get an rt board to compare the PCB. I have mixed feelings on it though....... I wonder what the board consumption is for the rt. I would guess they wouldn't be able to sleep the board since it's constantly monitoring the battery.

Yes. Please PM Thank you. Since we are generally a small group of people using these batteries, I'm not sure it's worth the cost (time and material). Today you can aquire a standard HV valence bms pretty easily. Also, the HV bms are easy to convert to 12/24/48 and you have the positive of...

I also want to note, the bms outputs a ton of data. I haven't counted all of the fields that I'm writing to the database, but it's many more than I'm displaying in the app. Since all of the data goes into a database, you can use grafana to display all of this data. You can also modify the...