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I am getting the following error error on my 200A JBD BMS FET Software Locked It showed up after I turned off discharging just after my battery got to LVP cutoff at 2.5v on one cell. I wanted to take one of my two batteries off line which I continued the test on the other which was at a...

I am building a 3p4s battery for my motorhome which will be mounted on a 22" x 22" tray. I have drawn up two possible layouts and wonder what pros and cons there are to these layouts. Suggestions for other layouts that will fit in a 22" c 22" box are also welcome. The primary load on the...

Has anyone used the EVO data logging feature? If so, what did you record and how do you read the data?

I have never ordered from AliExpress and tried to place an order today. It said that the transaction failed, and I could file an appeal application which seems weird. The appeal wants photographs of my driver's license, credit card and back statement. WTF!!! That just has "scam" written...

Can anybody who has received a JK BMS in the past month or so tell me how it was packaged? In June, I received a 4s JK and the packaging was very subpar, and the unit had significant damage. I want to order a replacement but am hoping that they are packaging them better after my fiasco.

I have a Magnum MS1212 2000w / 100A 12v inverter-charger in my motorhome. By batteries are a couple of drop-in 460Ah packs for a total capacity of 920Ah I am trying to decide which charge profile to use with I am plugged into a full hookup site. I have two programable profiles that should...

I tried to make my first ever purchase from AliExpress and the payment did not go through. I was directed to another page that told me that I could "appeal" the decision. The info that they need is a photocopy of my driver's license, my credit card including the name, number and security...

I am looking for a way to decrease my generator run time for charging my 920Ah bank in my motorhome. I have a 10kw genset and a 2000w/100A Magnum inverter charger. I would like to find a relativly inexpensive charger to just add 100A - 200A of bulk when running the generator. My BMS will...

My JK BMS has two temperature probes but the wires are very short. My BMS is mounted outside of my cell encloser and both probes are only long enough to reach the first of my 8 cells. What is the best way to lengthen these wires so that I can test the temperature at both ends?

I am planning to get a JK BMS and have an EVO 1212F-HW inverter charger that has a CAN port. I see that the JK also has a CAN port. What is involved in getting these two devices to talk to each other?

Can an 120v AC resistive heating element be used to create a predictable load to test the total battery capacity? I am just thinking out loud so this could be drivel or just plain ignorant. If I have a 120v 500W resistive horse water tank heating element, could I connect it to my battery to...

Anyone have any experience with Basen Green aka Shenzhen Basen Technoloty Co. Ltd. aka Emily Peng / Daria Long? Please share your experience. I ordered two 12v 460Ah batteries from Basen Green and assumed that it would have full tracking like every other product that I have ordered from...

The inverter / generator like a Honda EU200i has a gas engine that turns a DC alternator which creates DC power. It then runs that power through an invertor to produce 120vAC. I have two of these generators, one of which is only use on my boat to charge by batteries through the Victron shore...

For those of you who are using the braided bus bars from Minerals do you have any problems with them being long enough? The documentation says that they are 70mm - 75mm from center of hole to center of hole. Given that the width of all the 271ah - 304ah cells that I am aware of is 70mm that...

Does anyone know how much current if any is used by the JK BMS when it is turned off with the power button. What I am looking for is winter storage with not charge or discharge. My thought is to turn off the BMS and remove the class T fuse.

Does anyone have any experience with with any of the new Docan pre-built 12v battery packs? I was looking at this 230Ah pack and four of them would fit into the battery tray on my motorhome. I think they are built with EVE 230Ah cells and the 200A JBD bluetooth BMS.

I am building a 2p4s bank with all of the cell's book-stacked. I plan to drill and tap the buss bars for the sense wires to the BMS (b-, b1, b2, b3, b4, B+) rather than under the terminal screws. Where should the sense wires be located. I can think of two primary locations. 1. Between the...

On the new generation of EVE cells, I see that height of the cell to the top of the terminal is 207.5mm±0.5mm but this is without the laser welded studs added. What is the actual total height of the cells with the 6m studs and with the newer Threaded Screw-in Terminal Studs? I have a height...

I am looking to add a second 100A charger to my motorhome for bulk charging when dry camping. I have two 460Ah of LFP installed and charge with a Magnum MS2012 charger at about 100A from a 10kw genset. These batteries can take 200A each so and the generator is hardly doing anything at 100A of...

Does anyone know how much current if any is used by the JK BMS when it is turned off with the power button. What I am looking for is winter storage with not charge or discharge. My thought is to turn off the BMS and remove the class T fuse.

The BMS, inverter/charger and solar controllers that I am looking at all have a plug on the back that says "CAN port". for the CAN noob, are there any tutorials or videos explaining what the heck CAN is and what it can do for me?

late last summer me and several others who received some of the first JK B2A8S20P BMS's had their units fail to boot. since then, I have not seen as many comments about this problem. Are we still having that problem or has JK resolved the issue on the later units?

I have a drop-in battery with a an internal unlocked JBD inside of a sealed case. When I charge it, one cell hits OVP of 3.65v when the pack voltage is only 14.1v with the low cell voltage of 3.37v (delta voltage of 280ms). After a full capacity test the pack capacity is about 96.7% of...

Is there any reason to leave the sense wires on the BMS at the full length on the wiring harness or can they be cut to length as needed to reach each cell? My JK BMS should be here tomorrow, and I would like to cut them to length to keep the build tidy. I believe that the JK actually auto...

Well, I am committed. dreaming, plotting, planning no more. Let the building begin. I finally did it. My LFP is on its way. ( EVE 280K (560A @ 12v) From Docan Power 4s JK BMS with 2-amp active balance and 200-A charge/discharge capacity (350-A surge for 5 minutes) from Henkzor Flexible...

I am designing some spacers for the fixture for my cells and also need to know how big the gap is between the top of the cell and the bottom of the buss bars on the threaded stud and the threaded screw-in terminal studs. I am 3-d printing spacers that will create a 2mm gap between each sell...

My 2s JK BMS has been working without issues since the beginning of July. Today I was installing new shore power charger and shut the BMS off with a long press on the power button and went about my install. After everything was connected, I pressed the JK power button and instead of the crisp...

I have a couple of 460Ah battery packs and during the inisial charge, I am seeing 250 mv of difference in cell voltage when charging at 14.0v. With this delta, I cannot charge any higher than 14.0v without getting a LVC on the cell with the highest SOC. The high cell seems to stablize at...

Any opinions as to what this statement means? I was ready to order one of the new Hankzor JK-B2A8S20P-H BMS with Bluetooth /RS485 /Heat function which is the new 4s version of the JK BMS with 2-amps active balancing and 200A charge and discharge. Then in reading the description of the...

On my sailboat, the in-rush current for the starter on the diesel engine far exceeds the discharge capacity of most BMS's, but the cells can handle the current without problem. I have been thinking that I could build a pack with small cells [50Ah to100Ah] with a BMS and a High output normally...

It seems that there are several choices in apps for use with the JBD BMS's. I have looked at a couple, but they don't seem as nice as some that I have seen on some of the review videos. Which ones have you found that you like using?

Any tutorials on how to test internal resistance? What tools and / or meters are required?