Product Details
Upgrade to Next-Gen Energy Storage with EVE MB31 314Ah
Take your energy independence to the next level with the EVE MB31 314Ah LiFePO4 cell—the industry's latest breakthrough in high-density energy storage. Engineered specifically for heavy-duty electric utility, high-capacity home backup, and demanding off-grid power walls, the MB31 delivers massive capacity in a standard footprint. Experience zero compromise on safety, efficiency, or lifespan.
⚙️ [H2] 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) |
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
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.
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.
Why Builders Choose AmpBird Cells
High Consistency
Matched voltage and resistance across every cell for stable series/parallel packs.
Long Cycle Life
Designed for long-term daily cycling — 8000+ cycles at 80% DoD.
Multiple Applications
DIY battery packs, solar storage, RV, marine, and off-grid systems.
Reliable Supply
Stable sourcing from major manufacturers — CATL, EVE, REPT, CALB.
Every cell. Every batch. Zero compromise.
Testing & Quality Control
Before any cell leaves our warehouse, it passes a four-stage inspection protocol.
Capacity Testing
Every cell is individually charged and discharged to verify actual capacity matches rated specifications. Cells that fall below 98% of rated capacity are rejected.
IR Testing
Internal resistance measured at 1kHz AC. Cells are grouped by IR values to ensure consistent pack performance. Matched within ±0.02 mΩ per batch.
Cell Matching
Cells sold as sets are matched by capacity and IR within 1% tolerance. This ensures uniform charge/discharge behavior and maximum pack lifespan.
Visual & Mechanical Inspection
Each cell undergoes visual inspection for dents, scratches, terminal damage, and swelling. QR code traceability links each cell to its factory test report.
One cell. Endless possibilities.
Applications
Home Solar Storage
Build 24V or 48V battery banks for residential solar. Stack cells for 5–30 kWh capacity.
RV & Camper
Replace AGM with 4S LiFePO4. Same footprint, 3× usable capacity, 60% less weight.
Marine
Corrosion-resistant terminals. Build trolling motor banks or house batteries for sailboats and yachts.
Off-Grid Systems
Reliable energy for cabins, remote telecom, and agricultural pumping. No grid, no problem.
DIY Battery Projects
Custom builds for e-bikes, power walls, portable power stations, and experimental energy storage.
Technical Specifications
Detailed datasheet values. Individual test reports available per batch.
| Translation missing: en.products.product.specification | Translation missing: en.products.product.detail |
|---|---|
| Cell Type | Prismatic LiFePO4 |
| Brand | EVE |
| Model | MB31 |
| Nominal Voltage | 3.2V |
| Rated Capacity | 314Ah |
| Energy | 1004.8Wh |
| Cycle Life | 8000 Cycles @70% SOH |
| Cell Grade | Grade A |
| Initial AC Resistance | 0.18±0.05mΩ |
| Dimensions | 207.2 × 173.7 × 71.7 mm |
| Weight | 5.60kg |
| Standard Charge Current | 157A (0.5C) |
| Max Continuous Charge Current | 314A (1C) |
| Standard Discharge Current | 157A (0.5C) |
| Max Continuous Discharge Current | 314A (1C) |
| Charge Voltage | 3.65V |
| Discharge Cut-off Voltage | 2.5V (>0°C) / 2.0V (≤0°C) |
| Operating Temperature | Charge 0–60°C / Discharge -30–60°C |
| Warranty | 5-Year |
QUESTIONS & ANSWERS
