All of my JBD came set to only balance above 3.4v.You have it about right.
But the JBD BMS from Docan has a factory default for enabling balance at 3.3v.
The only communication hardware they provided with my BMS was a bluetooth link.
The Android bluetooth app only allows you to monitor the BMS, not change parameters.
To change parameters you need to use a MSWindows PC program over a UART link.
Which is a PITA if you're like me and don't want anything to do with MSWindows.
As always, let me know if I have this wrong.
It's been awhile since I have looked into the various ways of communicating with a JBD BMS.
There are some projects to talk to the JBD BMS under other OS's,
but they would be a bit harder to get going.
No, they ARE a JBD BMS with better testing done, and actual support.Possibly the app from Overkill solar will work? It is my understanding the BMS(s) are slightly modified JBD.
Manuals are good too...
Support/Downloads – Overkill Solar
overkillsolar.com
I've got the 4s 200A JBD BMS and can change all of the settings over Bluetooth using version 3.1.1026 of the xiaoxiang app. It is on Overkill's website here: https://overkillsolar.com/support-downloads/
Ah, that was the trick.I have had no problem changing my Docan JBD BMSs with the Android Bluetooth app. After you change the numbers on the setting page, touch the little check mark in the upper right to actually write them to the device.
I like what Overkill is doing, their documentation is the best I've seen for the JBD BMS's.
Would have bought from them if they offered the 200A 16S BMS.
Worth a few extra bucks to get good support on this stuff.
One more puzzle here.Same here for my Docan 200A “JBD” BMS, the overkill solar app allowed me to change every parameter I wanted. I was able to side load it on to multiple Amazon kindles.
That plus a couple free iOS apps on my phone and iPad that are read only it’s pretty handy to have multiple devices to check the BMS
Well, it is a 200A BMS, so asking it for much more could lead to trouble at some point. The BMS also comes with 4 gauge wire, which I don't think is really big enough. I'm changing mine to 2/0 instead. I prefer to keep cables cool under normal use.One more puzzle here.
Have a JBD 7S-20S-200A BMS with 32 Eve LF280K cells in a 2P16S configuration, so 2*280=560Ah.
Using the xiaoxiang Android app, version 3.1.1026.
The "nominal capacity" is set to 560 Ah
The settings for the "Charge Overcurrent" and "Discharge Overcurrent"
both went to 300A automatically when I set the nominal capacity to 560A Ah.
But down at the bottom of the settings under "Hardware Over Current and Short Params"
the "Hardware overcurrent protection" cannot be set any higher than 100A with a max delay of 1280ms
and the "Hardware short circuit protection" has a max of 200A with a max delay of 400uS.
My Magnum MS-PAE4448 4400W inverter spec says it can deliver a 5 sec surge at 8500W, or 8500W/48V=177A
The Magnum PT100 PV charger can give a max of 100A.
Still somewhat on subject, as the BMS was bought from Docan along with the LF280K's.
Well, it is a 200A BMS, so asking it for much more could lead to trouble at some point. The BMS also comes with 4 gauge wire, which I don't think is really big enough. I'm changing mine to 2/0 instead. I prefer to keep cables cool under normal use.
Total current is the main reason that I bought two BMS units to run 16S2P. I have 4/0 cable to run from the battery combiner lugs to the inverter (also a PAE4448). A feature of two in parallel is that I can remove one battery for service if needed and still keep the power online.
Each battery has a 300A Class T fuse protecting it.
Whoa what happened about talking about Docan cells?
Lol ?
Is Docan still going to sell the LF280K?
It is a moving target and I have no current quotes, The ladies in some of the previous posts can give you a current quote. I have done business with several of them and freight and prices are a constantly changing and volume mattersAnyone know what the prices are currently?
It is a moving target and I have no current quotes, The ladies in some of the previous posts can give you a current quote. I have done business with several of them and freight and prices are a constantly changing and volume matters
Several years ago I purchased cells for less than$125/kWh DDR to my home. I got a quote six months ago for a small volume from US stock but deferred until that project was better defined.
Yes I know. I only have 48 and the 42kWhs go by quickly in winter.Right now I have 96 in use and I need to double my battery bank eventually. Trying to power a house uses a lot more batteries than you think. Especially in winter and no sun for days
Yes, I use a heat pump. It has to work harder for the few hours that the outside temperature is around 32 F. Most of the time it is pretty efficient, only using 15 kWhs per day. That is the reason I run a deficit in kWhs for the first few months of my relevant period. However my Spring and Summer generation erase that and I am hoping to net out to zero at next true up.Heating loads?