2V 314Ah A-Grade LiFePO4 Battery Cell – MB31 is a high-capacity prismatic Lithium Iron Phosphate cell designed for professional battery-pack assembly, solar energy storage, inverter systems, EV applications, UPS systems and commercial energy storage
With a 314Ah nominal capacity, 3
2V nominal voltage, 0
19mΩ internal resistance and an 8000-cycle life specification, this cell is designed for applications requiring high energy capacity and long-term repeated cycling
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Product Description
Short Description
The 3.2V 314Ah A-Grade LiFePO4 Battery Cell – MB31 is a high-capacity prismatic Lithium Iron Phosphate cell designed for professional battery-pack assembly, solar energy storage, inverter systems, EV applications, UPS systems and commercial energy storage.
With a 314Ah nominal capacity, 3.2V nominal voltage, 0.19mΩ internal resistance and an 8000-cycle life specification, this cell is designed for applications requiring high energy capacity and long-term repeated cycling.
Its large-format design and high capacity make it an excellent choice for building 24V, 48V/51.2V and other custom LiFePO4 battery systems.
Product Overview
The MB31 314Ah LiFePO4 Cell is an A-Grade prismatic battery cell designed for high-capacity lithium battery construction.
Each cell provides approximately 1004.8Wh of nominal energy, allowing battery manufacturers to build large energy-storage systems with a relatively low number of cells.
With its 0.19mΩ internal resistance and 8000-cycle specification, the cell is suitable for long-term applications including solar storage, inverter backup, EV battery systems and commercial energy storage.
Key Features
MB31 314Ah LiFePO4 Cell
A-Grade Cell
3.2V Nominal Voltage
314Ah High Capacity
Approx. 1004.8Wh Nominal Energy
8000 Cycle Life
0.19mΩ Internal Resistance
Large-Format Prismatic Cell
Stable LiFePO4 Chemistry
High Energy Storage Capacity
Suitable for Solar Energy Storage
Suitable for Inverter Batteries
Suitable for UPS Systems
Suitable for EV Battery Packs
Suitable for Home Backup
Suitable for Commercial Energy Storage
Suitable for Off-Grid Systems
Suitable for Custom Lithium Battery Packs
Technical Specifications
Specification Details
Model MB31
Cell Grade A Grade
Chemistry LiFePO4
Cell Type Prismatic
Nominal Voltage 3.2V
Nominal Capacity 314Ah
Nominal Energy Approx. 1004.8Wh / 1.005kWh
Internal Resistance 0.19mΩ
Cycle Life 8000 Cycles*
Cell Weight Approx. 5.6kg
Dimensions (L×W×H) 174 × 208 × 72mm
Charge Cut-Off Voltage 3.65V
Discharge Cut-Off Voltage 2.5V
Discharge Temperature -20°C to 55°C
*Actual cycle life depends on charging/discharging conditions, depth of discharge, temperature, current, BMS settings, cell balancing and operating conditions.
A-Grade 314Ah LiFePO4 Cell
The MB31 cell is specified as an A-Grade LiFePO4 cell, making it suitable for professional battery-pack assembly.
For building a multi-cell battery, proper cell matching is recommended. Cells should preferably have similar:
Voltage
Capacity
Internal resistance
State of charge
Overall condition
Proper matching helps improve cell consistency and the performance of the completed battery pack.
0.19mΩ Internal Resistance
The updated internal resistance specification for this cell is:
0.19mΩ
Low internal resistance can help reduce voltage drop and internal heat generation during battery operation.
This is particularly useful for high-capacity battery systems where the cells may be required to deliver substantial current.
Actual resistance readings can vary depending on:
Cell temperature
State of charge
Measurement equipment
Measurement method
Cell condition
8000 Cycle Life
The MB31 314Ah cell is specified with:
8000 Cycles
This makes it suitable for applications requiring frequent charging and discharging over a long operating period.
Suitable applications include:
Solar energy storage
Home backup
Inverter systems
UPS systems
Commercial energy storage
Industrial energy storage
EV battery systems
Off-grid energy storage
Actual cycle life depends on depth of discharge, charging/discharging current, temperature, charging voltage, BMS settings and overall operating conditions.
314Ah High Capacity
Each cell provides:
3.2V × 314Ah = 1004.8Wh
Therefore, one cell provides approximately:
1.005kWh Nominal Energy
The high capacity allows battery manufacturers to build large-capacity battery systems using fewer cells compared with lower-capacity LiFePO4 cells.
Battery Configuration Examples
4S – 12.8V 314Ah
Using 4 cells in series:
4 × 3.2V = 12.8V
Nominal energy:
12.8V × 314Ah = 4.02kWh
Suitable for compatible 12V-class LiFePO4 battery systems.
8S – 25.6V 314Ah
Using 8 cells in series:
8 × 3.2V = 25.6V
Nominal energy:
25.6V × 314Ah = 8.04kWh
Suitable for high-capacity 24V-class solar and inverter battery systems.
16S – 51.2V 314Ah
Using 16 cells in series:
16 × 3.2V = 51.2V
Nominal energy:
51.2V × 314Ah = 16.08kWh
Suitable for large 48V/51.2V-class energy-storage systems.
Parallel Configuration
Parallel connections can increase total battery capacity while maintaining the same nominal voltage.
Configuration Approx. Capacity
1P 314Ah
2P 628Ah
3P 942Ah
4P 1256Ah
For example:
16S2P = 51.2V 628Ah
Nominal energy:
Approx. 32.15kWh
The final configuration should be selected according to the inverter, BMS, charger, load requirements and intended application.
Suitable for 24V 314Ah Battery
Using 8 MB31 cells in series creates a:
25.6V 314Ah LiFePO4 Battery
Nominal energy:
Approx. 8.04kWh
This configuration is suitable for:
Solar systems
Hybrid inverters
Home backup
UPS systems
Off-grid systems
Commercial backup applications
Suitable for 51.2V 314Ah Battery
Using 16 cells in series creates:
51.2V 314Ah
with approximately:
16.08kWh Nominal Energy
This configuration is suitable for large solar, inverter and energy-storage applications.
Dimensions & Installation
The cell dimensions are approximately:
174 × 208 × 72mm
The large-format construction should be considered when designing a battery enclosure.
Adequate space should be provided for:
Cell terminals
Busbars
Insulation
BMS wiring
Cell supports
Battery cables
Mechanical compression/support
Always verify the physical dimensions before manufacturing a custom battery box.
Cell Weight
Each cell weighs approximately:
5.6kg
A complete battery will weigh more depending on the number of cells and additional components such as:
BMS
Busbars
Cables
Terminals
Fuse/breaker
Enclosure
Cell supports
Charging & Discharge Voltage
Maximum Charge / Cut-Off Voltage
3.65V per cell
Discharge Cut-Off Voltage
2.5V per cell
The battery charger and BMS should be correctly configured for LiFePO4 chemistry.
Operating Temperature
The provided specification indicates a discharge temperature range of:
-20°C to 55°C
For best performance and service life, the battery should be operated within suitable temperature conditions.
High-current applications should also have appropriate thermal management and installation conditions.
Suitable Applications
☀️ Solar Energy Storage
Ideal for building high-capacity LiFePO4 batteries for storing solar energy and using it during nighttime or periods of low solar generation.
⚡ Inverter Batteries
Suitable for compatible 24V and 48V/51.2V inverter battery systems.
🏠 Home Backup
The 314Ah capacity provides substantial energy storage for residential backup applications.
🏢 Commercial Energy Storage
Suitable for commercial and industrial applications requiring high capacity and long cycle life.
🚗 EV Applications
Can be used for compatible electric vehicles and high-capacity EV battery packs when the complete system is properly designed.
🔋 UPS Systems
Suitable for compatible high-capacity LiFePO4 UPS and backup-power systems.
🌐 Off-Grid Systems
Suitable for off-grid solar and renewable-energy storage applications.
Why Choose MB31 314Ah A-Grade Cell?
The MB31 314Ah cell offers:
314Ah High Capacity
3.2V Nominal Voltage
A-Grade Cell Quality
0.19mΩ Internal Resistance
8000 Cycle Specification
Approx. 1.005kWh Energy per Cell
Large-Format Prismatic Construction
-20°C to 55°C Discharge Temperature Range
It is a strong option for building high-capacity, long-life LiFePO4 battery systems for solar, inverter, EV, UPS, home backup and commercial energy storage.
Recommended Battery Assembly
For professional battery-pack construction:
Use cells of the same model and capacity.
Preferably use cells from the same batch.
Match cell voltage before assembly.
Check internal resistance.
Properly balance cells.
Use a suitable LiFePO4 BMS.
Use correctly rated busbars.
Use appropriately sized DC cables.
Provide proper insulation.
Use suitable fuse/breaker protection.
Provide proper mechanical cell support.
Configure the BMS according to LiFePO4 requirements.
Test the completed battery before commissioning.
Package Includes
1 × MB31 3.2V 314Ah A-Grade LiFePO4 Prismatic Cell
Not Included
BMS
Busbars
Battery Box
Charger
Cables
Cell Supports
Fuse/Breaker
Battery Assembly
Important Note
The specifications above are based on the provided product image and your updated specification, including A-Grade cell quality, 314Ah capacity, 0.19mΩ internal resistance and 8000-cycle specification.
Actual cycle life and performance depend on charging voltage, discharge depth, current, temperature, BMS settings, cell balancing and overall battery-pack design.
For professional battery assembly, use properly matched cells and a correctly rated LiFePO4 BMS, busbars, cables, terminals and protection system.
Frequently Asked Questions
The MB31 is a 3.2V 314Ah A-Grade LiFePO4 prismatic battery cell designed for high-capacity battery-pack and energy-storage applications.
The nominal capacity is 314Ah.
The nominal voltage is 3.2V.
Yes, this product is specified as an A-Grade LiFePO4 cell.
It uses Lithium Iron Phosphate (LiFePO4) chemistry.
The cell is specified with an 8000-cycle life under suitable operating and test conditions.
No. Actual cycle life depends on depth of discharge, charging/discharging current, temperature, charging voltage, BMS settings and operating conditions.
The specified internal resistance is approximately 0.19mΩ.
Low internal resistance can help reduce voltage drop and internal heat generation during current flow.
Approximately 3.2V × 314Ah = 1004.8Wh, or around 1.005kWh.
Yes. It is suitable for building high-capacity LiFePO4 solar energy-storage batteries.
Yes. It can be used to build compatible 24V, 48V and 51.2V inverter battery systems.
Yes. The 314Ah capacity makes them suitable for substantial residential backup systems.
Yes. Its high capacity and long-cycle specification make it suitable for commercial and industrial energy-storage systems.
Yes. They can be used in compatible EV battery packs when the complete battery system is correctly designed for the motor and controller.
Yes. 4 cells in series (4S) produce approximately 12.8V 314Ah.
Approximately 4.02kWh nominal energy.
Yes. 8 cells in series (8S) produce approximately 25.6V 314Ah.
Approximately 8.04kWh nominal energy.
Yes. 16 cells in series (16S) produce approximately 51.2V 314Ah.
Approximately 16.08kWh nominal energy.
Yes. Parallel configurations increase total Ah capacity while maintaining the same nominal voltage.
Two 314Ah cells in parallel provide approximately 628Ah.
Yes. A 16S2P configuration provides approximately 51.2V 628Ah and around 32.15kWh nominal energy.
It is a large-format prismatic LiFePO4 cell.
The specified dimensions are approximately 174 × 208 × 72mm.
The cell weighs approximately 5.6kg.
The specified charge cut-off voltage is 3.65V per cell.
The specified discharge cut-off voltage is 2.5V per cell.
The specified discharge temperature range is approximately -20°C to 55°C.
Yes. A suitable LiFePO4 BMS should be used when multiple cells are assembled into a battery pack.
Yes, provided the selected JK BMS has the correct series configuration, current rating and LiFePO4 parameters for the battery being built.
Yes. Cells should preferably be matched according to voltage, capacity, internal resistance and overall condition.
For best results, it is recommended to use cells of the same model, capacity and similar electrical characteristics rather than mixing different cell types.
Yes. They can be used for compatible high-capacity LiFePO4 UPS and backup-power systems.
Yes. They are suitable for high-capacity off-grid solar and renewable-energy storage systems.
Yes. An 8S 314Ah configuration provides approximately 8.04kWh nominal energy.
Yes. A 16S 314Ah configuration provides approximately 16.08kWh nominal energy.
It offers 314Ah high capacity, 3.2V nominal voltage, A-Grade cell quality, 0.19mΩ internal resistance and an 8000-cycle specification, making it suitable for solar, inverter, EV, UPS, home backup and commercial energy-storage applications.
