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SunWell Energy

10.5kWh 51.2V Portable Mobile LiFePO4 Battery

10.5kWh 51.2V Portable Mobile LiFePO4 Battery

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Built as a wheeled portable LiFePO4 battery, the 10.5kWh 51.2V Portable Mobile LiFePO4 Battery brings dependable storage to sites, events and off-grid loads. Built-in protection guards every cell against over-charge, over-discharge, over-current and short circuits. It runs on a 51.2Vdc system and expands from one unit into a larger storage bank.

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10.5kWh 51.2V Portable Mobile LiFePO4 Battery — Technical Specifications
MODELSW-51205-M
Rated Voltage51.2Vdc
Cell Combination16
Rated Capacity205Ah
Energy Storage10.5kWh
Cycle Life25±2℃,0.5C/0.5C, EOL70%≥6000
Max. Charge Current200A
Max. Discharge Current200A
Discharge Cut-Off Voltage43.2Vdc
Charge Cut-Off Voltage57.6Vdc
Charge Temperature0°C to 50°C@60±25% Relative Humidity
Discharge Temperature-20°C to 50°C@60±25% Relative Humidity
Storage Temperature-20°C to 50°C@60±25% Relative Humidity
IP ClassIP20
Material SystemLiFePO4
Case MaterialMetal
Case TypeMobile Power
Product Dimension(L×W×H)622×520×227mm
Package Dimension(L×W×H)722×695×328mm
Net Weight92kg
Gross Weight112kg
ProtocolCAN/RS485/RS232
MonitoringBluetooth/WLAN Optional
CertificatesUN38.3, MSDS

Features

  • LiFePO4 chemistry delivers safe, long-lasting power. The cobalt-free cells resist thermal runaway and hold capacity through deep daily cycling, rated for 6000+ cycles at high state of health.
  • Wheeled portable build moves power anywhere. Integrated wheels and a handle roll the 10.5kWh between rooms, sites and events without fixed installation.
  • A multi-protocol BMS guards every cell. It tracks per-cell voltage, current and temperature, balances cells and blocks over-charge, over-discharge, over-current and short circuit, talking to inverters over CAN/RS485/RS232.
  • Long service life cuts ownership cost. Rated for 6000+ cycles, it supports years of daily charge and discharge without premature replacement.
  • Wide operating range suits tough sites. It discharges from -20°C to 50°C and handles up to 200A continuous current, staying stable in unconditioned indoor and sheltered spaces.
  • Parallel-ready design grows with you. Add more units on the same bus to expand capacity while keeping the existing inverter and cabling.

Applications

  • Residential Backup: Runs fridges, lighting, and internet through extended outages as part of a home essential-load system.
  • Outdoor & Remote Sites: The mobile form factor and −20°C discharge range suit camps, field work, and temporary installations.
  • Small Commercial Use: Powers larger tools, small machinery, and equipment at markets, exhibitions, and job sites off-grid.
  • Solar Energy Storage: Pairs with PV through hybrid inverters to store daytime solar for evening and overnight use.
  • Off-Grid Power: Supplies independent power for cabins, kiosks, and telecom sites away from the grid.
  • Events & Exhibitions: Delivers clean, silent backup power for lighting, AV, and vendor equipment at indoor and outdoor events.

Battery Safety & Protection

The SW-51205-M is built around Lithium Iron Phosphate (LiFePO4) cells, a chemistry valued for thermal stability and a low risk of thermal runaway relative to other lithium types. The cells sit inside a metal enclosure rated IP20, which guards against solid-object contact and limits dust ingress in indoor and sheltered installations.

An integrated battery management system, accessed through the unit's CAN, RS485, and RS232 ports, handles cell monitoring and balancing across the 16-series stack. Optional Bluetooth and WLAN modules let installers check status remotely, while the wide operating envelope—0°C to 50°C charging and −20°C to 50°C discharging—keeps the pack online through seasonal swings. UN38.3 and MSDS certifications confirm international transport-safety compliance.

Performance & Lifecycle Advantage

Rated at 10.5kWh (205Ah) with a 51.2V nominal output, the SW-51205-M delivers stable energy for sustained and high-current loads through its 200A continuous charge and discharge capability. A discharge cut-off of 43.2Vdc and charge cut-off of 57.6Vdc define a safe operating window that protects cell health over time.

The LiFePO4 chemistry provides a long design life of 6000 cycles at 70% capacity retention under 25±2°C, 0.5C conditions, supporting years of daily cycling. Weighing 92kg net with a 622×520×227mm form factor, the pack balances added capacity and portability, and against lead-acid it offers lighter weight, lower maintenance, and better tolerance for frequent deep cycling—lower lifetime cost for off-grid and backup use.

Warranty

LiFePO4 batteries are backed by a 5-year warranty. If you experience any quality issues within the warranty period, please contact us and we will arrange a replacement or repair promptly.

Frequently Asked Questions

Will this battery work with my existing 51.2V inverter?

Yes, the SW-51205-M runs at a 51.2V nominal rating with CAN, RS485, and RS232 communication, so it communicates with most standard 51.2V off-grid and hybrid inverters. Verify your inverter's protocol during setup.

How much longer can it run than a smaller pack?

With 10.5kWh (205Ah) stored, an 800W load runs roughly 12–13 hours, far longer than a 5kWh unit. The 200A discharge rating also drives heavier tools and small machinery without throttling.

Can I add more batteries later?

Yes. Multiple units can be paralleled using the RS485/CAN bus to expand both capacity and current as your site grows, scaling from one pack to a larger bank.

Is it safe to use in hot or cold weather?

The LiFePO4 cells and metal IP20 enclosure keep operation stable, with a charge range of 0–50°C and discharge down to −20°C. Avoid charging below freezing to protect cell health.

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