SERIES / PARALLEL CONNECTION

THE PREMISE OF CONNECTION

To connect in series or /and parallel, batteries should meet the below conditions:

1. identical batteries with the same battery capacity (Ah) and BMS (A);
2. from the same brand (as lithium battery from different brands has their special BMS);
3. purchased in near time (within one month).

LIMITATION FOR SERIES/PARALLEL CONNECTION

Support connecting up to 16 identical batteries for up to:

4 in series as 48V (51.2V) battery system / 4 in parallel as 400Ah battery system.

HOW TO CONNECT BATTERIES

Step 1 Wear insulating Gloves

Wear insulating gloves for protection before connecting. Please pay attention to operation safety in the process of connection.

Step 2 Voltage Balancing Before Connection

Below steps are necessary to reduce the voltage difference

between batteries and let the battery system perform the best of it in series or / and in parallel.

1. Pull out insulating plugs. 2. TEST The Battery Voltage with a Multimeter >12V To Next Step. <12V Contact us at service to help solve the problem. 3. FULLY CHARGE The Battery

(voltage at rest: >13.33V)

4. Connect all of the batteries in parallel, and leave them together for 12~24hrs. 5. They' re now ready for the connection.

#5.1 Connect Batteries in Series

#5.2 Total input & Output Connection

Use two copper bars (instead of battery terminals) to connect all the positive and negative output/input cables, ensuring that the input &output currents of each battery are balanced. (Not required when connecting batteries only in series.) lt is not recommended to use one terminal as the total positive or negative output/in.put of the battery system as the connected terminals may heat up or even melt if the total output input current of the battery system is too high.

Precautions:

① All wire diameters and lengths are consistent, Recommended wire diameter 6AWG .

② All wire diameters and lengths are consistent,Recommended wire diameter 6AWG

③ All wire diameters and lengths are consistent,Recommended wire diameter 6AWG

④ Select the recommended wire diameter based on the actual load in the following text.Recommended wire diameter 0AWG .

6. Rebalancing Every 6 Months

It is recommended to rebalance the battery voltage every six months following Step 2 . If you' re connecting multiple batteries as a battery system, as there might be voltage differences after six months of the battery system running.

Appendix

System parameters after series and parallel

Battery System: x P y S
Nominal Voltage	12.8 * y V
Discharge Current	100 * x  A  Max
Continuous Load Power	(12.8 * y) ( * 100 * x ) W Max

RECOMMENDED CABLE SIZING

Battery cables should be properly sized to handle the expected load. Refer to the table below for amperage ratings for different sizes of copper cables.

PVC COPPER CABLE SIZE (AWG / mm )	AMPACITY (A)
8AWG  8.3mm²	58
6AWG  16mm²	128
4AWG  25mm²	175
3AWG  35mm²	245
2AWG  50mm²	300
1AWG  70mm²	360
0AWG  100mm²	450