BSL B-LFP48-100E 3U 5.12kWh 51.2V LiFePO₄ Rack-Mount Battery
The BSL B-LFP48-100E 3U is a low-voltage lithium energy storage battery engineered for structured solar and backup power installations where scalability, cycle life, and system integration are critical. Designed in a compact 3U rack-mount format, this battery is intended for installation in standard 19-inch battery cabinets and technical enclosures.
Unlike wall-mount batteries aimed at single-unit residential use, this battery is purpose-built for modular system expansion and organised battery stacking, making it suitable for both residential energy storage rooms and commercial installations.
System Role and Typical Applications
The B-LFP48-100E 3U stores energy generated by solar PV systems and supplies power during grid outages, load shedding, or off-grid operation. It is commonly used in hybrid solar systems, off-grid installations, and commercial energy storage projects where multiple batteries are combined into a single energy storage bank.
This is a low-voltage battery designed for 48V-class hybrid and inverter-charger platforms.
51.2V Low-Voltage Battery Architecture
Operating at a nominal voltage of 51.2V, the battery falls within the standard low-voltage lithium category widely supported by residential and commercial inverters. The internal configuration uses sixteen 3.2V LiFePO₄ prismatic cells connected in series, providing stable voltage behaviour and predictable inverter operation under load.
LiFePO₄ Cell Technology and Long Cycle Life
The battery is composed of UL-listed prismatic lithium iron phosphate cells, selected for their thermal stability, chemical safety, and extended service life. It has been tested to deliver approximately 6000 deep discharge cycles at 80% depth of discharge, enabling daily charge and discharge operation for well over a decade under normal operating conditions.
This chemistry is non-toxic, cobalt-free, and well suited for continuous energy storage applications.
Smart BMS and Electrical Protection
An internal Battery Management System continuously monitors voltage, current, and temperature at cell and pack level. Protection functions include over-charge, over-discharge, over-current, short-circuit protection, and temperature monitoring.
CAN bus communication enables coordinated operation with compatible hybrid and inverter-charger systems.
Parallel Expansion and System Scalability
The B-LFP48-100E 3U supports parallel connection from a single 5.12kWh battery up to a maximum system capacity of 322.56kWh. This makes it suitable for installations that require future expansion without replacing existing batteries.
Rack-Mount Installation and Physical Design
The battery is designed for installation in a standard 19-inch rack cabinet. Its 3U height allows efficient vertical stacking while maintaining proper airflow and cable management. The enclosure is constructed from metal and rated to IP54, offering improved protection against dust and limited moisture ingress.
Technical Specifications – BSL B-LFP48-100E 3U Battery
Battery Identity
- Brand: BSL
- Model: B-LFP48-100E 3U
- Cell chemistry: LiFePO₄
Electrical Ratings
- Nominal energy: 5.12 kWh
- Nominal capacity: 100 Ah
- Nominal voltage: 51.2 V
- Charge voltage: 58.4 V
- Discharge cut-off voltage: 40 V
Charge and Discharge Performance
- Standard charge current: 0.5C
- Maximum charge current: 50 A
- Maximum discharge current: 100 A
- Maximum pulse current: 150 A (300 ms)
Environmental and Physical
- Installation type: 19-inch rack-mounted
- Dimensions: 538 × 483 × 136 mm (W × H × D)
- Weight: Approximately 46 kg
- Enclosure material: Metal
- Protection rating: IP54
- Charge temperature range: 0°C to 45°C
- Discharge temperature range: -20°C to 55°C
- Storage temperature range: -10°C to 45°C
Certification and Lifecycle
- Cycle life: Approximately 6000 cycles at 80% DoD
- Certifications: IEC62619, UL1973, CE, UN38.3
- Hazard classification: Class 9
- Manufacturer warranty: 10-year warranty with extended 12-year service support
FAQ
Frequently Asked Questions About the BSL B-LFP48-100E 3U Battery
What type of battery system is the BSL B-LFP48-100E 3U?
The B-LFP48-100E 3U is a low-voltage 51.2V lithium iron phosphate rack-mount battery designed for structured solar energy storage systems. It is intended for installation inside a 19-inch battery cabinet or rack and is not a wall-mounted residential battery.
How is this battery different from wall-mount lithium batteries?
Unlike wall-mounted batteries that are typically designed for one to three units, this battery is engineered for scalable systems with multiple batteries connected in parallel. Rack-mounted batteries offer better cable management, airflow, service access, and long-term expandability, especially in technical rooms or commercial installations.
Is this battery compatible with hybrid inverters?
Yes. The battery is compatible with many 48V-class hybrid and inverter-charger platforms that support lithium batteries via CAN bus communication. Compatibility depends on the inverter supporting the BSL CAN protocol.
Is CAN bus communication required for this battery?
While the battery can operate without CAN communication in voltage-controlled systems, CAN bus communication is strongly recommended. CAN communication allows the inverter to correctly manage charging, discharging, current limits, and battery protection, which improves performance and battery lifespan.
How many BSL 3U batteries can be connected together?
The battery supports parallel connection from a single unit up to a large multi-battery system with a maximum combined energy capacity of approximately 322.56kWh, provided that correct cabling, busbars, and inverter capacity are used.
Does this battery support daily cycling?
Yes. The battery is rated for approximately 6000 cycles at 80% depth of discharge and is designed for daily charge and discharge operation in residential and commercial solar systems.
Can this battery be used in off-grid systems?
Yes. The B-LFP48-100E 3U is suitable for off-grid, hybrid, and backup power systems, provided the inverter supports lithium batteries and correct current limits are configured.
What type of installation environment is required?
The battery is designed for indoor installation in a dry, ventilated environment. It should be installed inside a battery rack or cabinet, away from direct sunlight, moisture, and excessive heat sources.
Does the battery include internal protection?
Yes. The integrated Battery Management System provides protection against over-charge, over-discharge, over-current, short-circuit, and temperature-related faults. These protections operate automatically to safeguard both the battery and the connected inverter.
Is this battery suitable for residential homes?
Yes, but it is best suited to homes with a dedicated inverter or battery room. For standard residential garages or living spaces, wall-mount batteries may be more visually appropriate, while this battery excels in technical or utility environments.
Can different battery brands be mixed in the same system?
No. This battery should only be paralleled with identical BSL B-LFP48-100E 3U batteries. Mixing different battery brands, capacities, or chemistries in the same battery bank is not recommended and can cause imbalance or system faults.
Who should install the BSL B-LFP48-100E 3U battery?
Installation must be carried out by a qualified solar or electrical professional experienced with lithium battery systems, rack-mounted installations, and inverter CAN communication setup.
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