JKBMS Smart BMS 8S-24S 24V-72V 200A 0.6A アクティブバランス Bluetooth内蔵 RS485 PCB バッテリー保護ボード リチウムイオンLiFePO4 LTOバッテリーパック(JK-BD6A24S20P)用

Fantastic product. Took me a while to build a battery and set up the BMS but worked like a charm and with the help of some great YouTube videos was able to complete the setting properly.

***MUST READ REVIEW**: First time using the JKBMS. I have used many other BMS from various other companies. I Was very excited to use this one because it is rated highly by people in the field. Anecdotally, there's good feedback. My experience with it otherwise was extremely awful. Here's the story: I had just got done designing and building a 35ah, 72v battery out of 18650 cells. 210 cells, 21s/10p. I am no stranger to building batteries, I have a battery business building custom batteries for people, and tons of experience in this field. Once the battery was completed. It was time to put the BMS on. I made sure everything was perfect. Every balance lead went to the correct cell group, and the B- and p- we're connected appropriately. I then connected the app. And input the correct parameters, and everything was perfect. I turned charging on, and connected my charger, and charged it up to its maximum. After the charge I enabled the active balance feature. And I monitored it while it balanced. Everything was going fine for a few minutes... Then literally all of the sudden out of nowhere I got a notification for cell grouping 10 and 11 saying there was an error. Then literally the two balance wires started turning red hot, melted through the heat shrink and continued to heat up and within seconds the whole battery was on fire! It almost burned down my whole house. My dining room table is burnt, my hardwood floors are burnt. I had to act fast so I had no choice but to pick up the flaming battery and run outside with it, and I extinguish the fire outside in the grass. Fast forward to the next morning, I go to check out the battery, I took what was left of the heat shrink off and all the other electrical insulation and tape I had had on for safety (thank God). I fully inspected the battery very thoroughly. And could not find any human error on my part that was evident or could be linked to why this fire broke out. It would seem, or I would guess -that the balance leads in theory would have had to have been arcing with something which would have made the glowing red hot wires that resulted in the fire - (my educated guess?) There was no human error. In conclusion this was a faulty BMS, and it almost burnt down my house. Now, I'm not one to leave bad reviews. But this is all just the facts and the truth of the matter and I feel it was necessary to share this. As an experienced professional in battery manufacturing, I can't say that I would recommend this product just based off my experience. I would like for the company to make it right. I would suggest for the creators of the JK BMS to establish better QC within their company. As this was clearly a faulty BMS with something wrong with it. I am out $1,000 for the battery cells alone. Not to mention all the time and work I put into this battery. I've tried reaching out to them with no answer. So I have explained it to Amazon customer service, and I have initiated a refund. I've sent it back, even in it's damaged State, as per Amazon's instructions and I hope at the very least I get my refund for this experience. I would be willing to try jkbms again based off of all the success lots of others have had with it. But I am hesitant. I'd be scared to get another faulty BMS from them. So I don't know what I'll do from here. Most likely get another BMS from a different company. I don't know. Anyways I just wanted everybody to hear this story and be cautious when using this BMS. I'm sure there are other faulty ones out there that are going to go out to customers and them have the same experience. I wish this on one! Be safe make sure to electrically insulate everything always.

I've now used a number of these to set up 24v LFP batteries. The work well and the Bluetooth function is very helpful. The equalization works well. I don't imagine I've tried to run them at 200A discharge. It would be helpful to have a slightly longer pigtail for the leads though. Since that length is so short, I run the pigtails into Anderson SB120 connectors that can run up to 240A static with the proper inserts. That gives me much more flexibility in mounting. Another feature I like are the readily available displays - from small summary displays to large 4+ inch displays that will also indicate individual cell voltages. Overall, great units.

The installation was straightforward and hassle-free. As my first experience with a Battery Management System (BMS) like this, I found it surprisingly simple to set up despite my AC/DC electrical background, tweaking the parameters was intuitive. My engine ECM expertise helped me grasp it faster than most, aligning perfectly with my off-grid goals. This JK BMS (8S-24S 100A with 0.6A active balancing) excels in lithium setups, supporting 8-24 series cells (24V-72V) and 100A charge/discharge in a common-port design. It offers robust protections against overcharge, over-discharge, overcurrent, short circuits, and temperature issues (via NTC). The 0.6A active balancer efficiently equalizes cells for ~95% utilization. Bluetooth app monitoring tracks voltage, current, temp, SOC, SOH, and capacity in real-time, with RS485 for inverter integration. Compatible with LiFePO4, Li-ion, and LTO for solar, RV, or EV use.

This is the best BMS I think. So many options and settings to get things just the way you want. There is a steep learning curve for newbies but there is lots of info on the web to help you through. I like the off grid garage guy in Australia. I can’t think of anything I would change on this BMS. Looks like great quality too!