Smart BMS protection
Built-in battery management supports voltage, current, temperature, communication, and fault protection for expandable low-voltage storage systems.
Rack-mounted low voltage LFP battery module
FNS Power 48V 100Ah 3U Low Voltage LiFePO4 Battery Module
FNS Power 48V 100Ah 3U Low Voltage LiFePO4 battery module features a built-in smart BMS, 98% round-trip efficiency, and a 6000-cycle lifespan. Utilizing safe, cobalt-free chemistry to prevent thermal runaway, it supports up to 32 units in parallel and is compatible with most standard inverters. UL1973, UL9540A, and IEC62133 certified. Ideal for on/off-grid solar, emergency backup, and residential energy storage. Includes a 10-year warranty.
Built for scalable solar backup and residential ESS projects
The FNS Power 48V 100Ah 3U low voltage LiFePO4 battery module gives installers a compact, cobalt-free storage platform for modular battery banks. The rack form factor helps standardize cabinet layouts, while the smart BMS supports monitoring and protection for safer long-term operation.
High efficiency operation
Designed around a 98% round-trip efficiency target to help solar and backup projects reduce conversion losses across repeated daily cycles.
Safe cobalt-free chemistry
LiFePO4 chemistry helps improve thermal stability and supports safer deployment in residential and distributed energy storage environments.
- On-grid solar storage
- Off-grid homes
- Emergency backup
- Residential ESS
- Light commercial backup
- Telecom cabinets
Technical specification summary
Use this section as a project-screening reference before confirming final inverter protocol, cabinet depth, installation environment, and local certification requirements with the FNS Power team.
Certification references include UL1973, UL9540A, and IEC62133 as provided in the product documentation. Final project compliance should be checked against the installation country and system configuration.
| Product type | 48V 100Ah 3U low voltage LiFePO4 battery module |
|---|---|
| Battery chemistry | Cobalt-free lithium iron phosphate for stable thermal behavior |
| BMS | Built-in smart BMS for monitoring, communication, and protection |
| Cycle life | 6000-cycle lifespan design |
| Efficiency | 98% round-trip efficiency |
| Scalability | Supports up to 32 units in parallel for larger storage capacity |
| Compatibility | Compatible with most standard inverters, subject to project protocol confirmation |
| Warranty | 10-year warranty |
How the module fits into a battery storage system
A strong low-voltage ESS design is not only a battery choice. It also depends on inverter communication, cabinet layout, protection design, commissioning, and long-term service planning.
Define load profile
Confirm backup time, peak load, cycling frequency, and the role of solar or grid charging.
Match inverter protocol
Review inverter brand, communication protocol, and BMS compatibility before final system design.
Scale capacity
Use parallel expansion to build the battery bank around required usable energy and cabinet space.
Plan service access
Leave practical space for inspection, cable management, module replacement, and ongoing maintenance.
Recommended internal resources for project buyers
Continue through the closest FNS Power solution pages to compare system types, technology options, and support paths.
Residential and C&I ESSCompare rack-mounted battery modules and complete low-voltage energy storage solutions.
Battery Products & TechnologyReview LFP battery architecture, BMS functions, and modular storage platforms.
Integrated Smart SolutionsExplore integrated energy storage systems for monitoring, management, and deployment.
Energy Storage SolutionsReturn to the complete FNS Power storage portfolio for telecom, data center, residential, and C&I use cases.
FAQ for buyers and installers
Can this battery be used for off-grid solar?
Yes. It is suitable for off-grid and hybrid solar energy storage when paired with a compatible inverter and properly sized system design.
Is it suitable for emergency backup?
Yes. The 48V 100Ah 3U module can support emergency backup systems where compact rack installation and expandable capacity are required.
What should be confirmed before ordering?
Confirm inverter compatibility, parallel quantity, cabinet depth, cable layout, environmental conditions, certifications, and warranty/service requirements.
Build a scalable 48V battery bank for your next project
Share your inverter model, backup time target, daily cycling profile, and installation region. FNS Power can help confirm battery configuration and project-fit details.
Document-checked product data
48V 100Ah 3U Low Voltage LFP Battery Module: verified parameters and buyer-ready positioning
Updated from Sacred Sun product inventory
| Core configuration | 3U rack-mounted 48V 100Ah LFP module for 19-inch racks or FNS cabinets. |
|---|---|
| Chemistry / technology | LiFePO4 prismatic cells with built-in BMS |
| Nominal voltage | 48V class |
| Capacity / energy | 100Ah; about 4.8kWh nominal at 48V |
| Power rating | Battery module; power/current rating not stated in DOCX |
| Scalability | Up to 32 units in parallel; no series wiring |
| Cycle life / efficiency / warranty | 6,000 cycles at 80% DOD, 0.5C; 98% RTE; 10-year limited warranty |
| Certifications / standards | UL1642, UL1973, UL9540A, IEC62133, UN38.3 |
| Communications / monitoring | RS485, CANbus, Modbus/SNMP/TACP; remote wireless DTU monitoring |
| Protection / enclosure | BMS protection against over/under-voltage, high current, short circuit and temperature extremes |
| Primary applications | Off-grid solar, grid backup, self-consumption, TOU, zero export, demand charge management, UPS, telecom, RV, marine |