Polarium SLB48-150-145-5 | 48V | 150Ah | Lithium-ion Battery

The Polarium SLB48-150-145-5 is a high-capacity 48 V, 150 Ah lithium-ion backup battery engineered for operators requiring dependable energy storage across telecommunications networks, hybrid power systems, industrial infrastructure, and remote environments. Built on Polarium’s fifth-generation LFP platform, this 19-inch 4U module delivers stable long-term performance with a rated energy capacity of 7.2 kWh and a durable iron-based chemistry optimised for demanding backup applications.

The battery is designed to support consistent operation in varied climates, with discharge capability down to –20 °C and charging supported from 0 °C to +55 °C. Its robust mechanical construction and IP20-rated enclosure are suited to controlled indoor installations such as telecom shelters, utility sites, control rooms, and industrial cabinets. At 58.6 kg, the unit balances high energy density with a practical form factor, allowing efficient integration into 19-inch rack systems.

A BMS-controlled 100 A circuit breaker provides protection during operation and maintenance, while integrated system supervision helps ensure safe and predictable performance over the battery’s lifecycle. The module’s electrical characteristics, including a 6 kW peak discharge capability and controlled charge profile, support reliable backup operation during grid outages, generator transitions, and renewable power fluctuations.

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, strong cycle performance, and smart system compatibility, the SLB48-150-145-5 offers a dependable, rack-optimised energy storage solution for operators seeking to upgrade or expand their backup power infrastructure.

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Features

High-Capacity LFP Energy Storage - Delivers 150 Ah of rated capacity and 7.2 kWh of usable energy, providing extended backup time for telecommunications, industrial networks, and remote sites that require longer autonomy during outages.
Durable Cycle Performance - Designed for long-term operation with up to 6000 cycles at 0.5C and 80% SOH, supporting frequent cycling in hybrid power systems and renewable-assisted sites where batteries regularly charge and discharge.
Wide Environmental Operating Range - Supports discharging down to –20 °C and up to +60 °C, with charging available from 0 °C to +55 °C. This range enables dependable operation in Australian climate conditions and thermally variable enclosures.
Integrated Battery Protection & Safety Controls - A built-in, BMS-controlled 100 A circuit breaker supports safe operation, along with protections for cell voltage, current, and temperature. Safety certifications include IEC62619, IEC62368, and UN38.3. The BMS includes automatic reconnect behaviour after safe conditions return.
Smart Monitoring & System Intelligence - Equipped with dual RS485/RJ45 ports and Modbus communication, the battery supports local and remote monitoring through Polarium Studio software. Automatic cell balancing and system supervision maintain stable performance across its lifecycle.
Secure Installation with Anti-Theft Capability - The module includes Polarium’s patented Anti-Theft Device, which disables battery operation if removed from the site, helping prevent unauthorised use.

Specifications

TECHNICAL SPECIFICATIONS
Enclosure Size	19" 4U
Lithium chemistry	LFP
Rated Voltage	48 V
Rated Capacity Ah (0.2C, 25°C to LVBD)	150 Ah
Rated Energy Wh (0.2C, 25°C to LVBD)	7200 Wh
Calendar Life @ 80% SOC	15 years
Cycle Life	6000 cycles, 0.5C, 25 °C, 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
Min Charging Voltage	52.5 V
Operating Temperature Charging	0 to +55 °C (32 to 131 °F)
Operating Temperature Discharging	-20 to +60 °C (-4 to 140 °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. 58.6 Kg (129 lbs)
Dimensions mm (in")	W 440 D 475 H 177.4 mm (W 17.3” D 18.7” H 7.0”)
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 whatever comes first. Data subject to change without notice *If the charge current is 100 A or higher, the battery will automatically reduce the charge current to 6-12 A temporarily. Data subject to change without notice

Technical Illustrations

Drawing_01_Polarium_SLB48-150-145-5_Lithium-ion_Battery

Drawing_02_Polarium_SLB48-150-145-5_Lithium-ion_Battery

Drawing_03_Polarium_SLB48-150-145-5_Lithium-ion_Battery

Downloads

Polarium_SLB48-150-145-5-Rev-5.0_Datasheet.pdf

TECHNICAL SPECIFICATIONS
Enclosure Size	19" 4U
Lithium chemistry	LFP
Rated Voltage	48 V
Rated Capacity Ah (0.2C, 25°C to LVBD)	150 Ah
Rated Energy Wh (0.2C, 25°C to LVBD)	7200 Wh
Calendar Life @ 80% SOC	15 years
Cycle Life	6000 cycles, 0.5C, 25 °C, 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
Min Charging Voltage	52.5 V
Operating Temperature Charging	0 to +55 °C (32 to 131 °F)
Operating Temperature Discharging	-20 to +60 °C (-4 to 140 °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. 58.6 Kg (129 lbs)
Dimensions mm (in")	W 440 D 475 H 177.4 mm (W 17.3” D 18.7” H 7.0”)
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 whatever comes first. Data subject to change without notice *If the charge current is 100 A or higher, the battery will automatically reduce the charge current to 6-12 A temporarily. Data subject to change without notice

Polarium_SLB48-150-145-5-Rev-5.0_Datasheet.pdf

Find the Right Model

	Model Number	Rated Voltage (Vdc)	Rated Capacity (Ah)	Rated Energy (Wh)
	SLB48-150-145-5	48Vdc	150Ah	7200Wh	Powerbox Website Product Enquiry Fill out the form below and one of our Powerbox specialists will be in contact with you shortly. First Name Last Name Phone Email Company Name Country State NSW VIC QLD SA WA NT ACT TAS Not applicable Please indicate the nature of your product enquiry: (You may select more than one) Pricing & Availability Technical Support / Application Guidance Product Documentation Other Industry Product you're enquiring about Product Model Need assistance SLB48-150-145-5 Message (optional) Enquire Now

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