Polarium SLB48-100-135-5H | 48V | 100Ah | Lithium-ion Battery
The Polarium SLB48-100-135-5H is a 48 V, 100 Ah lithium-ion backup battery designed to deliver dependable energy storage for telecommunications, hybrid power systems, industrial networks, and remote infrastructure. Built on Polarium’s fifth-generation LFP architecture, this smart 19-inch 3U module offers stable long-term performance, extended cy...
Read MoreThe Polarium SLB48-100-135-5H is a 48 V, 100 Ah lithium-ion backup battery designed to deliver dependable energy storage for telecommunications, hybrid power systems, industrial networks, and remote infrastructure. Built on Polarium’s fifth-generation LFP architecture, this smart 19-inch 3U module offers stable long-term performance, extended cycle life, and efficient operation across demanding environments.
Its iron-based lithium chemistry supports high reliability with a 15-year calendar life and up to 8000 cycles at full depth of discharge, making it a strong long-term replacement or upgrade path from VRLA banks. The built-in battery management system provides continuous cell supervision, charge control, protection functions, and communication via RS485/Modbus, enabling seamless integration with modern DC power systems and network monitoring platforms.
The SLB48-100-135-5H is engineered for consistent performance in variable climates, supporting wide operating temperature ranges for both charging and discharging. Its compact 3U design allows efficient rack utilisation while maintaining a lightweight footprint at approximately 38 kg. The unit also includes a BMS-controlled 100 A circuit breaker, ensuring safe operation during installation and maintenance.
For added site protection, the battery incorporates Polarium’s patented Anti Theft Device, which disables the unit if it is removed from its installation location. The feature can be activated by serial number under a licence fee, providing an additional layer of security for unattended or remote sites.
With long service life, stable LFP performance, and integrated monitoring capability, this model is well suited for operators needing reliable backup power in telecom shelters, utility control sites, industrial automation environments, and remote installations.
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Features
- Long Service Life with Stable LFP Chemistry - The SLB48-100-135-5H uses iron-based lithium technology designed for extended operational life. It delivers up to 8000 cycles at full depth of discharge and maintains a 15-year calendar life, offering a reliable long-term alternative to traditional VRLA systems.
- Wide Operating Temperature Range - Engineered for varied Australian environments, the battery supports charging from -5 to +55 °C and discharging from -20 to +55 °C. This ensures consistent performance in both controlled indoor installations and remote, climate-exposed locations.
- Integrated Battery Management System - A built-in BMS provides cell balancing, charge and discharge protection, automated current limiting, and system-level alarms. Continuous supervision safeguards the battery against abnormal conditions, improving uptime and reducing maintenance requirements.
- Advanced Communication & Monitoring Capability - With dual RS485/RJ45 ports and Modbus support, the unit offers flexible integration with external controllers, DC power systems, and network monitoring software. Local management software (Studio) allows full visibility of battery status and performance parameters.
- Compact, Rack-Optimised 19” 3U Design - The lightweight 38.3 kg module fits standard 19-inch racks and occupies only 3U of height, enabling efficient use of space in telecom shelters, control rooms, and industrial cabinets. Its robust enclosure is rated to IP20 and built for reliable long-term operation.
- Embedded Safety and Protection Features - Safety functions include a BMS-controlled 100 A circuit breaker, compliance with IEC62619 and IEC62368 standards, and UN38.3 transport certification. The system is designed to support safe installation, handling, and operation throughout its lifecycle.
Specifications
| TECHNICAL SPECIFICATIONS | |
|---|---|
| Enclosure Size | 19" 3U |
| Lithium chemistry | LFP |
| Rated Voltage | 48 V |
| Rated Capacity Ah (0.2C, 25°C to LVBD) | 100 Ah |
| Rated Energy Wh (0.2C, 25°C to LVBD) | 4800 Wh |
| Calendar Life @ 80% SOC | 15 years |
| Cycle Life | 8000 cycles, 0.2C, 25 °C,DoD 100%, SOH 80% |
| Peak Discharge Power | 6kW for 60 seconds |
| Discharge Cutoff Current | 100 A |
| End-of-Discharge Voltage (LVBD)* | 40 V |
| Charge Current Limitation (CLD)** | 100 A |
| Charge Voltage for 100% SOC | 54.75 V |
| Operating Temperature Charging | -5 to +55 °C (23 to 131 °F) |
| Operating Temperature Discharging | -20 to +55 °C (-4 to 131 °F) |
| Operating Relative Humidity | According to ETSI 300 019-1-3 class 3.2 (0-95%) |
| Storage Temperature | -20 to +60°C (-4 to 140°F) |
| Weight | Approx. 38.3 Kg (84 lbs) |
| Dimensions mm (in") | W 440 D 461 H 132 mm(W 17.3” D 18.1” H 5.2”) |
| Circuit breaker | 100 A, BMS Controlled, single pole |
| IP class | IP20 |
| Communication Protocols | RS485, RJ45 (2) ports, Modbus |
| Safety Standards | IEC62619, IEC62368, UN38.3 |
| Management & Monitoring | Software for PC (Studio) included for full local monitoring and management. Remote connection via Modbus |
| *Cut off when one cell reaches 2.5 V, 15 cells in series.Data subject to change without notice. **If the charge current is 100 A or higher, the battery will automatically reduce the chargecurrent to 6-12 A temporarily.Data subject to change without notice. |
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Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.