I WAS using Charger BMS' with Passive Balancing AND QNBBM-8S Active Balancers on ALL of my Production packs.
Yes I am also the guy who rewrote the Chargery Manuals and had a small hand in the upgrades & development of the DCC's and more.
1, BMS8T+DCC = $240 USD + S&H&Duties.
1, QNBBM-8S = $145 USD + S&H&Duties.
I have these on ALL of my 6 production packs. I also have Utility Packs with JBD & JK-BMS and two different Active Balancers (Test rigs too).
Now I am replacing the Entire Shlameel with
JK-BMS [24S 2A 150A BT] with BlueTooth Part Number: B2A24S15P $143.29 USD
Product Link:
https://www.aliexpress.com/item/1005003104573871.html
-plus add: CANbus Module + RS485 Module $7.73 USD each
Product Link:
https://www.aliexpress.com/item/1005003451100409.html
These come with 2- 7AWG Silicone wires for the 150A model pre-attached.
2x 7AWG = 4AWG. So I am extebnding the short lines using a Tinned Butt-Splice and running 4AWG Silicone to cell & to terminal.
* This is ultrafine strand Silicone wire designed for such purposes, it is not just crap-assed copper in PVC.
On Cell side a Tinned Lug with 5/16 hole, on Batt Lug side get's a 3/8 Lug (I have passthrough terminals on all packs).
LESSONS LEARNED DEPT.
The QNBBM and other Active Balancers were NOT settable / adjustable, not great when dealing with different grade cells. They are preset andf that's what you get, not always good and not great when cells are LOW.
The JK with built-in active balancing and also fully programmable & tweakable is the best all-around solution.
Relative Tidbits. My Production Bank is: My utility packs are EVE 105AH Cell Based, not in bank.
2x, EVE 24V/280AH packs with BULK Cells.
1x, EVE 24V/280AH packs with Matched & Batched Cells
2x, Aoyoupower 24V/175AH Used EV Grade cells recovered from the ShunBin disaster.
Hope it helps, Good Luck.