When building battery pack, consider the target voltage/capacity/use purpose, and the connection method of the battery is the way to achieve these differences.
Generally speaking, 12V, 24V and 48V battery packs are more popular with battery DIY enthusiasts. These three types of battery packs can satisfy most devices. Since the voltage of a single LiFePO4 battery is 3.2V, series and parallel connections are required to complete a suitable battery pack. In general, high-voltage systems are more recommended, which means smaller currents and lower wiring costs. It is also safer for DIY enthusiasts.
| # of Cells in Series | 4 | 8 | 15 | 16 |
|---|---|---|---|---|
| Battery Nominal Voltage | 12.8V | 25.6V | 48V | 51.2V |
| Operational Voltage Range | 12 - 14.4V | 24 - 28.8V | 45 - 54V | 48 - 57.6V |
In addition, it should be noted that the length of the busbars required by different battery packs may be different depending on the battery connection and placement methods. The details need to be judged based on the actual situation and the battery brand. The Straight placement method is the most recommended. This placement method will make the positive and negative poles of the entire battery pack farther away, thereby making it safer.
The Most Commonly LiFePO4 Battery Capacities for Build Battery Pack
The Hot Sale LiFePO4 Prismatic Cells Dimension and Weight
12V(12.8V) LiFePO4 Cell Configurations
12V 4-Cell Configurations
12V 8-Cell Configurations
24V(25.6V) LiFePO4 cell Configurations
24V 8-Cell Configurations
24V 16-Cell Configurations
48V(51.2V) LiFePO4 cell Configurations
Among the different LiFePO4 pack configurations, both a 15-cell 48V pack and a 16-cell 51.2V pack are commonly used. A 16-cell LiFeP04 51.2V pack offers superior performance compared to that of a 15-cell 48V pack with the same grade cells as the 16-cell pack. Therefore, we recommend using 16 cells to assemble a 51.2V battery pack.
51.2V (16 x 3.2V) 200Ah | 10.24 kWh
48V (15 x 3.2V) 200Ah | 9.6kWh
48V 16-Cell Configurations
48V 32-Cell Configurations
There are many types of LiFePO4 cell combinations for building battery packs, the above only lists the most common configurations. Feel free to share your configuration scheme.
I have 16 304 cells, 2 Daly 8 s 24 volt bms. Growatt 12k inverter. I want to do 2 8 cell parallel 24volt, then connect 2 24 volt banks in series for 48 volt. Will this work?