Question 1

is there a specific order that wires need to be soldered to the board? Mains first then balanced leads for example?

Accepted Answer

Assuming the wires are not connected to anything on the other end (aka your battery holder is empty and you have no load or charger connected ) you should be fine with any order.   I would recommend moving from one side of the board to the other so you don't concentrate too much heat in one place. Try not to unsolder the pads from the board by applying to much heat. Don't solder live wires!

Question 2

Where does the charging lead connect?

Accepted Answer

Not answering the question, but my BMS had the same issue!  No voltage/current at P+/P- when everything else is wired up!

Question 3

can anyone tell me how to connect to the load? do I use p+ and p-?

Accepted Answer

Initially it was not  clear to me where the charge and where the load connected. Other reviews clarified that the both the charger and the load connect to the P+ and P-. The BMS auto switches between input and output depending on the voltage on P+P-.  I tested it on my Power wheels car and the full 20 plus volts were on the (P+P=) output terminals. With the charger connected for couple hours it raised the voltage from 3.6 to 3.8. One cell was at 4.0v . I will leave it on the charger overnight and see if it balances better. 
If you connect your load to B+B= , it will work but you will not have any load overcurrent or under voltage protection for your battery pack.  You would be able to run your device till the battery is totally dead, which damages l-ion cells.

Question 4

Can I wire two of these in series to make a 12s?

Accepted Answer

Yes, you probably could, but just be aware of the fact that if the BMS is unhappy with the 18650's that you have attached, it will shut down, so you're adding more points of failure by wiring two in series. I actually struggled with this 6S BMS for a while, and nearly gave up on it, because it kept shutting down, until I realized that the resistance of some of my cells was too high. After re-grading all my cells and culling the highest resistance cells, the BMS was able to stay up.

ASIN	B07QQT99P8
Amperage	40 A
Antenna Location	Bicycle
Battery Capacity	24 volts
Battery Cell Type	Lithium Ion
Best Sellers Rank	#505,343 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #478 in Cycling Electronics
Brand	daier
Customer Reviews	4.0 4.0 out of 5 stars (71)
Item Weight	0.02 kg
Manufacturer	daier
Model Name	24V 6S 40A
Model Number	E1107
Reusability	Single Use
Unit Count	1 Count
Voltage	24 volts

daier 24V 6S 40A 18650 Li-ion Lipolymer Battery BMS PCB Balance for ebike ebicycle

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