EVE MB31 314Ah LiFePO4 Cell|EP Energy(Poland Stock)
- $79.00
$103.00- $79.00
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$79.00
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Description
xUltimate 8000-Cycle High-Density Energy Storage for Solar, Off-Grid, RV & Marine DIY Battery Packs
Engineered for performance-driven DIY enthusiasts and off-grid power installers, the EVE MB31 314Ah Cell represents the gold standard in Prismatic Lithium Iron Phosphate (LiFePO4) technology. Featuring factory-fresh Grade A quality, an incredible 8,000 deep-cycle lifespan, and an innovative dual-terminal design, the MB31 delivers reliable, heavy-duty energy storage for home solar arrays, RV power setups, marine vessels, and custom DIY battery packs.
Choose the correct number of battery cells
Building a custom battery bank requires matching cell configurations in series (S) and parallel (P) to hit your system's target nominal voltage and total usable energy capacity. Use the comprehensive guide below to select the exact number of EVE MB31 3.2V 314Ah cells for your application:
| System Voltage | Configuration | Cells Required | Nominal Energy | Typical Application |
|---|---|---|---|---|
| 12V System | 4S1P | 4 Cells | 4.019 kWh | Camper Vans, Small Boats, Portable Power Stations |
| 24V System | 8S1P | 8 Cells | 8.038 kWh | Off-Grid Cabins, Large RVs, Overland Trucks |
| 48V System | 16S1P | 16 Cells | 16.076 kWh | Home Solar Energy Storage (ESS), Industrial Backups |
| 48V High Capacity | 16S2P | 32 Cells | 32.153 kWh | Whole-House Off-Grid Solar, Commercial Energy Banks |
Features
1. Grade A Brand New Quality & Factory Fresh Performance
Every EVE MB31 cell is 100% brand new direct from production with factory-fresh QR codes intact. Delivering full 314Ah nominal capacity and 1004.8Wh nominal energy, each cell undergoes rigorous factory testing to maintain ultra-low initial internal resistance (ACR: 0.18 ± 0.05 mΩ). This ensures minimal thermal generation and uniform voltage matching across your entire pack.
2. Exceptional 8000 Cycles & 15-Year Service Life
Invest once for decades of clean, reliable power. The MB31 offers an extraordinary 8,000 deep cycle life down to 70% SOH under standard 0.5P/0.5P charge and discharge conditions at 25°C. With a design lifespan exceeding 15 years, it dramatically lowers your cost per kilowatt-hour compared to traditional lead-acid or standard lithium-ion batteries.
3. High Efficiency & Power Delivery
Boasting an energy efficiency of ≥93.5% at 0.5P rate, the MB31 converts solar energy into usable power with minimal loss. It supports continuous charging and discharging power up to 0.5P (502.4W per cell), maintaining a low temperature rise (≤10°C) during heavy usage to protect long-term cell health.
4. Uncompromising Safety & Certified Stability
Safety is paramount for any custom energy system. The EVE MB31 chemistry features inherently stable Lithium Iron Phosphate (LFP) matrix that resists thermal runaway. Furthermore, the cell has successfully passed stringent safety performance standards (GB/T 36276)—including over-charge, over-discharge, short-circuit, crush, drop, thermal runaway, and heating tests—with Zero Fire and Zero Explosion.
Why Choose Double Holes Cell?
The EVE MB31 incorporates an upgraded dual-hole aluminum terminal design on both positive and negative poles. For DIY builders and professional pack assemblers, this provides distinct engineering advantages:
- Ultra-Low Resistance & Lower Heat: Securing busbars with two screws per terminal doubles the contact surface area. This halves contact resistance, preventing hotspots and power loss during high-current discharges.
- Superior Structural Stability: Twin-screw fastening completely prevents busbars from rotating or loosening under high mechanical vibration—essential for mobile applications like RVs, overland trucks, and marine vessels.
- Seamless Flexible Wiring: The double-hole setup makes it effortless to connect main power cables, active balancer wires, and BMS sense leads concurrently on separate fastening points without stacking lugs awkwardly.
- Reduced Torque Stress: Spreading tightening torque across two M6/M8 mounting points prevents terminal thread stripping or internal pole damage.
Packing List
Each 4-cell kit is shipped in heavy-duty UN38.3 certified protective foam packaging to guarantee complete safety during transit.
One Box
- ✓ EVE Cell x 4 (Grade A EVE MB31 3.2V 314Ah Prismatic Cell with Factory QR Code)
- ✓ Epoxy Plate x 4 (High-grade FR4 insulating plates for inter-cell compression & electrical isolation)
- ✓ Rigid Busbar x 4 (Heavy-duty nickel-plated copper busbars designed for double-hole terminals)
- ✓ Screw x 16 (Stainless steel terminal screws matching all dual-hole busbars)
Applications
Thanks to its high energy density (1004.8Wh per single cell), high safety standards, and robust deep-cycling abilities, the EVE MB31 cell is the ideal building block for a wide range of mobile and stationary battery applications:
- Off-Grid Solar Energy Storage Systems (ESS): Build custom 12V, 24V, or 48V home battery banks (16S 15kWh to 30kWh+) for continuous solar self-consumption, peak-shaving, and emergency backup power.
- RVs, Motorhomes & Camper Vans: Upgrade from heavy lead-acid or small lithium batteries to a high-capacity LiFePO4 bank that powers air conditioners, induction cooktops, and off-grid electronics effortlessly.
- Marine & Boat Power Supplies: Reliable deep-cycle power for electric trolling motors, house power banks, and sailboat navigation gear with zero maintenance and excellent resistance to sea-motion vibrations.
- DIY Solar & Power Station Projects: Perfect for geeks, solar installers, and off-grid tinkerers creating custom high-output power stations, off-grid cabins, and mobile work trucks.
- Commercial & Telecom Backups: Ideal for uninterruptible power supply (UPS) setups, remote telecommunication towers, and agricultural solar pumps.
Technical Specifications at a Glance
| Nominal Capacity / Energy | 314 Ah / 1004.8 Wh |
| Nominal Voltage | 3.2 V |
| Operating Voltage Window | 2.5 V – 3.65 V (2.0V cut-off below 0°C) |
| Initial Internal Resistance (ACR) | 0.18 ± 0.05 mΩ |
| Cycle Life (25°C, 0.5P/0.5P) | ≥ 8000 Cycles (to 70% SOH) |
| Cell Dimensions (L × W × H) | 173.7 mm × 71.7 mm × 207.2 mm |
| Weight | 5600g ± 300g |
| Charge / Discharge Temperature | Charge: 0°C ~ 60°C | Discharge: -30°C ~ 60°C |
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