The 3.2V 340Ah LiFePO4 battery offers 10,000+ cycles, tax-free EU/US shipping, and modular design for DIY 12V/24V/48V systems. Its Grade A cells ensure safety and longevity in solar storage, RVs, and golf carts. With high energy density and thermal stability, it outperforms lead-acid batteries, making it cost-effective for long-term renewable energy applications.
Deespaek Battery Energy Density
How Does LiFePO4 Chemistry Enhance Battery Performance?
LiFePO4 (lithium iron phosphate) batteries provide superior thermal stability, minimal voltage sag, and 4x longer cycle life than traditional lithium-ion. The stable phosphate cathode prevents thermal runaway, enabling safe operation in extreme temperatures (-20°C to 60°C). This chemistry maintains 80% capacity after 10,000 cycles, ideal for high-demand applications like solar storage.
The olivine crystal structure of LiFePO4 provides inherent stability against oxygen release during overcharge scenarios. Unlike NMC batteries that use cobalt, this chemistry eliminates the risk of exothermic reactions at high temperatures. Recent studies show LiFePO4 cells maintain 95% round-trip efficiency even at 2C discharge rates, compared to 85% efficiency in lead-acid alternatives. Automotive manufacturers are now adopting this technology for auxiliary power units due to its vibration resistance and 15-year calendar life.
What Are the Key Steps to Build a DIY 48V LiFePO4 Battery Pack?
1. Calculate energy needs: 340Ah x 48V = 16.3kWh.
2. Use 15x 3.2V cells in series for 48V nominal.
3. Integrate a 150A BMS with temperature cutoff.
4. Parallel cells using copper busbars to minimize resistance.
5. Test voltage balance (±0.05V tolerance) before enclosure installation. Always wear insulated gloves during assembly.
Deespaek 12V 200Ah LiFePO4 Battery
| Component | Specification |
|---|---|
| Busbars | 0.5mm thick copper |
| Insulation | 3M 1298 Linerless Tape |
| Compression Fixture | 300kgf clamping force |
What Safety Certifications Should Tax-Free Batteries Have?
For EU/US customs clearance, prioritize batteries with CE, IEC 62619, UL 1973, and RoHS certifications. The UN38.3 test summary is mandatory for air shipping. Tax-free status requires HS code 85076000 (lithium-ion batteries) with 0% VAT in EU countries. US importers need FCC Part 15 Subpart B for EMI compliance.
IEC 62619 certification specifically validates safety requirements for industrial batteries, including crush tests and forced discharge protocols. UL 1973 covers stationary storage applications up to 1000V DC systems. Recent EU battery directive updates mandate carbon footprint declarations (PEFCR) for all LiFePO4 imports exceeding 2kWh capacity. Always request the manufacturer’s Declaration of Conformity showing test dates within the last 18 months.
“Recent UL testing shows premium LiFePO4 cells achieving 18,000 cycles at 25% DoD – double their rated specs. However, consumers must verify IEC 62485-2 certification for series-parallel configurations exceeding 1000V.”
FAQs
- How long does shipping take for EU/US orders?
- Express air freight via DDP (Duty Paid) takes 7-12 business days. Sea shipping requires 35-45 days but reduces costs by 60%. All shipments include GPS-tracked thermal-stable containers.
- Can I mix old and new LiFePO4 cells?
- Never mix cells with >5% capacity difference. Aging cells create imbalance, forcing BMS to limit pack capacity. For expansion, add identical cells within 3 months of initial purchase.
- What warranty comes with Grade A cells?
- Reputable suppliers offer 5-year prorated warranties covering manufacturing defects. Warranty requires proof of proper storage temperatures and ≤80% average DoD. Cycle count verification through BMS data logs is mandatory for claims.