SOETECK SY-LI Series 51.2V Lithium Iron Phosphate Battery (LiFePO4) for Lead-Acid Battery Replacement

The SOETECK SY-LI Series 51.2 V LiFePO4 Battery pairs rugged lithium-iron-phosphate chemistry with an intelligent BMS to replace legacy lead-acid packs. The result is a lighter, longer-lasting energy module that supports quick CC/CV charging and reliable performance across wide temperature ranges, helping operators cut maintenance time and overall ownership costs.

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Product Overview

SOETECK SY-LI Series 51.2 V Lithium Iron Phosphate Battery (LiFePO4) for Lead-Acid Battery Replacement is designed as a plug-and-play upgrade for motive-power and stationary systems that currently rely on lead-acid blocks. Delivering 5.12 kWh at a nominal 51.2 V / 100 Ah, the module weighs just 40 kg, roughly one-third of an equivalent lead-acid pack, while offering a service life of ≥ 3000 cycles under 0.5 C, 80 % DOD conditions.

A highly integrated, low-consumption BMS monitors cell balance and controls charge or discharge currents up to 100 A continuous. Self-discharge is capped at ≤ 3 % per month, supporting long standby intervals. The battery operates safely from –20 °C to 55 °C and carries an IP6X enclosure rating, making it suitable for dusty warehouses, outdoor cabinets, and mobile platforms.

Direct CC/CV charging between 57 V – 57.6 V accelerates turnaround time, while an end-off voltage of 45 V preserves cell integrity. Series connection is permitted for up to two units; parallel operation requires a voltage delta ≤ 2 V. These characteristics allow the this series battery to lower total cost of ownership through reduced maintenance, lighter logistics, and longer lifespan in AGVs, RV house banks, solar hybrid storage, and emergency reserve systems.

Product Features

High Energy in a Lightweight Package

  • 5.12 kWh usable energy in a 522 × 240 × 218 mm shell
  • 40 kg net weight—around one-third of comparable lead-acid
  • Compact footprint eases installation in confined racks and vehicles

Extended Cycle Life

  • ≥ 3000 cycles at 0.5 C and 80 % DOD, 25 °C
  • Expected operational life span of 5 – 10 years
  • Fewer replacements slash long-term capital and service expenses

Integrated Smart BMS

  • Low-consumption controller with active cell balancing
  • 100 A continuous / 100 A pulse current capability
  • Real-time protection against over-voltage, over-current, and temperature faults

Wide Environmental Tolerance

  • Discharge: –20 °C – 55 °C; Charge: –10 °C – 55 °C
  • IP6X dust-tight enclosure
  • ≤ 3 % / month self-discharge supports seasonal use

Flexible System Integration

  • CC/CV charging at 57 – 57.6 V; end-off voltage 45 V
  • Series connection up to 2 units; parallel when ΔV ≤ 2 V
  • Drop-in replacement for lead-acid without major redesign

Typical Applications

  • Data Centers
  • Telecommunication Base Stations
  • Automated Guided Vehicles
  • Recreational Vehicles
  • Outdoor Surveillance Power
  • Emergency Backup Systems
  • Solar Energy Storage

Model Overview

The SOETECK SY-LI Series 51.2 V Lithium Iron Phosphate Battery (LiFePO4) for Lead-Acid Battery Replacement currently features model LUB51100PA, rated at 51.2 V / 100 Ah with a continuous current ceiling of 100 A. Housed in a 522 × 240 × 218 mm IP6X enclosure and weighing 40 kg, it offers superior energy density and ≥ 3000-cycle durability. Future capacity variants will share the same BMS architecture and connection guidelines (series ≤ 2; parallel ΔV ≤ 2 V), ensuring straightforward scaling within mixed battery banks.

ModelsNominal VoltageRated CapacityLengthWidthHeightTotal HeightAppox.Weight
SY-LUB51100PA51.2V100Ah522mm240mm214mm218mm40.0kg

Product Specifications

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