Product Details
Product Overview
The EVE MB31 314Ah is a high-capacity 3.2V LiFePO4 prismatic cell designed for energy storage and high-capacity battery systems. With 1004.8Wh nominal energy per cell, 16 cells can form a 51.2V 314Ah battery with approximately 16.08kWh of nominal energy.
AmpBird supplies brand-new Grade A EVE MB31 cells for DIY battery builders, solar storage projects, installers and battery integrators, with batch-matching support and compatible BMS, enclosures and battery components available.
Core Advantages
Superior Cycle Life: Its LiFePO₄ chemistry provides an exceptionally long service life, ensuring a low total cost of ownership.
Enhanced Safety: Excellent thermal and chemical stability minimizes risks associated with thermal runaway.
High Consistency: Premium Grade A manufacturing ensures tight tolerances in voltage, capacity, and internal resistance, which is critical for stable performance in series/parallel configurations.
High Energy Density: The large form-factor capacity reduces the number of parallel connections required in a battery pack, simplifying system design and improving reliability.
Primary Applications: Stationary Energy Storage (ESS), Commercial & Residential Backup Power, Electric Vehicles (e.g., buses, trucks, marine), and Heavy-Duty Motive Power.
Note: For design and integration, always refer to the official EVE data sheet for the most current and detailed specifications, including precise dimensions, maximum ratings, and temperature limits. A compatible Battery Management System (BMS) is mandatory for safe operation.
Technical Specifications
| Parameter | Specification |
| Manufacturer & Model | EVE MB31 |
| Chemistry | Next-Gen Lithium Iron Phosphate (LiFePO4) |
| Nominal Capacity | 314Ah |
| Nominal Voltage | 3.2V |
| Energy Capacity | 1004.8 Wh (Per Cell) |
| Cycle Life | ≥ 8000 Cycles @ 80% DoD, 0.5C/0.5C |
| Standard Charge/Discharge | 0.5C (157A) |
| Max. Continuous Discharge | 1C (314A) |
| Charge Temperature | 0°C ~ 60°C (Upgraded thermal performance) |
| Discharge Temperature | -30°C ~ 60°C |
| Terminal Design | Heavy-Duty M6 Welded Terminal Studs (Bolts Included) |
| Dimensions (L x W x H) | 173.9 x 71.7 x 207.2 mm (Standard 280Ah matching footprint) |
| Weight | ~5.55 kg (12.23 lbs) |
Checked Before Shipment
Every batch is inspected before dispatch to ensure consistency and safe delivery.
Voltage
OCV checked for cell consistency.
Internal Resistance
IR checked to identify abnormal variation.
Capacity
Capacity testing available for matched sets and project orders.
Appearance
Cell casing, terminals and QR codes inspected for damage or abnormalities.
Packaging
Terminal protection and packaging checked before dispatch.
Free Accessory Pack Included
Every single cell includes a complimentary installation kit designed for immediate, safe connection:
1 x EVE MB31 314Ah Premium Battery Cell
1 x Extended Heavy-Duty Copper Busbar (Optimized for 314A current handling)
2 x Stainless Steel Anti-Slip Flanged Nuts
1 x Custom FR4 Epoxy Insulation Board
Typical Applications
- 48V / 51.2V DIY LiFePO4 battery packs
- Residential solar energy storage
- Off-grid battery systems
- Backup power systems
- Commercial energy storage
- RV and marine battery banks
- Battery integration projects
Shipping and Delivery
DDP Door-to-Door
EU · US · AU · CA · UK · Ukraine · Thailand, Customs Clearance & Taxes Included
Remote/island addresses and other destinations: please contact us to confirm service availability.
Have your own freight forwarder? We’re happy to work with them and provide the required shipping documents.
Warranty & Technical Support
5-Year Limited Warranty
Covered by AmpBird’s 5-year limited warranty with responsive after-sales support.
After-Sales Support
If you receive damaged or abnormal cells, contact us with photos and test results. Our team will review the issue and provide an appropriate solution.
Free Technical Support
Support for BMS compatibility, battery configuration and basic troubleshooting.
Solution Advice
Tell us your application and requirements, and we’ll help recommend a suitable battery solution.
Why Choose AmpBird Cells
The foundation of every great battery build.
LiFePO4 Chemistry
Thermal stable, non-flammable, 3,000-8,000 cycle lifespan. The only safe choice for home energy storage.
Grade A Cells Only
Every cell batch-tested for capacity, internal resistance, and voltage before shipping. No B-grade, no surprises.
Deep Cycle Ready
Designed for 80% DoD daily discharge. Solar cycling, off-grid loads, and backup power -- built for real use.
-20℃ to 60℃ Operating
Wide temperature tolerance. Reliable in unheated garages, outdoor cabinets, and marine environments.
Compact Prismatic Form
Prismatic cells stack efficiently with minimal wasted space. Higher energy density than cylindrical cells.
Low Self-Discharge
< 3% monthly self-discharge rate. Store seasonally and come back to a full charge.
QUESTIONS & ANSWERS
