Polarium Battery SLB48-250-146-2S




  • 12.9 kWh / 250 Ah Rated Capacity @25ºC
  • NMC Lithium Chemistry
  • 48V Rated Voltage
  • 19″ 4U Enclosure Size
  • 10 Year Warranty & Local Support
  • 66kg Approximate Weight
  • Industry leading high energy density
  • Polarium Patented Current Limiting Device (CLD*)
  • Safe – all Polarium batteries are designed with safety in mind
  • Smart Battery Management System (BMS) built by Polarium
  • Inverter / Charger Agnostic
  • Maintenance Free
  • AC coupled and DC coupled compatibility


Polarium Battery SLB48-250-146-2S
Product Description

Polarium Battery SLB48-250-146-2S

Introducing the Polarium SLB48-250-146-2S lithium-ion battery module, a cutting-edge energy storage solution renowned for its exceptional efficiency and high power density. Engineered in Sweden as a dependable backup power system, the Polarium lithium-ion 48V / 250Ah  battery module is equipped with a range of innovative features that prioritise safety, simplicity, durability, intelligence, security, and sustainability. Trusted by critical infrastructure organisations throughout Australia, Polarium batteries ensure unwavering power support that you can count on.

Safety First
Your safety is top priority. All Polarium products undergo rigorous testing and certification to guarantee secure and worry-free operation. In addition, the Polarium Current Limiting Device (CLD) protects the battery module under a range of conditions. The battery will never overheat and give way to thermal runaway. You can be rest assured, you have the safest battery on the market.

Effortless Operation
Harnessing advanced technology has never been easier. Polarium batteries are designed for straightforward installation, effortless use, and require minimal maintenance for optimal performance and charge control.

Rugged Reliability
Capable of thriving in diverse conditions and environments, Polarium batteries offer added protection against dust and moisture, extending their operational lifespan.

Intelligent Functionality
Experience the convenience of active balancing, blackstart, and the flexibility of local monitoring via Bluetooth, among other intelligent features.

Unparalleled Security
With Polarium's exclusive Anti-Theft Device, you are assured of the utmost security. In the event of removal from the site, this patented feature disables battery functionality, and for added peace of mind, an optional GPS tracker can be incorporated.

Eco-Conscious Sustainability
Benefit from an exceptionally long battery life while minimising your environmental footprint. Polarium batteries are compact, lightweight, maintenance-free, and can be effortlessly managed remotely, aligning perfectly with sustainable practices.

Energy Resilience
Just like Australians, when conditions get tough, Polarium batteries don't give up when many others do. With the Patented Current Limiting Device (CLD), the current is reduced to keep the power on while not damaging the battery at the same time.

Local Support
Having been around since 1996, SEA don’t just supply a product, we work with our partners to ensure that all aspects of the installation and post sales support are catered. We back our products and customers (Installers 100%).

Solar Energy Australia have a partner network all over Australia. Our strategic partners give us the edge in the market, offering vertical support making sure that the customer is both happy with their batteries and proud they are supporting Australian business.


Product Specifications


Electrical Characteristics

Enclosure Size19” 4U
Lithium ChemistryNickel based
Rated Voltage48 V
Rated Capacity (0.2 C, 25 °C to LVBD)250 Ah
Rated Energy (0.2 C, 25 °C to LVBD)12954 Wh
Calendar Life @ 80 % SOC20 years
Peak Discharge Power6 kW for 60 seconds
Discharge Cutoff Current100 A
End-of-Discharge Voltage (LVBD)*35 V
Charge Current Limitation (CLD)**100 A
Charge Voltage for 100 % SOC58.8 V
Charge Voltage for 80 % SOC56 V

Environmental Characteristics

Operating Temperature Charging0 to +55 °C (32 to 131 °F)
Operating Temperature Discharging-20 to +60 °C (-4 to 140 °F)
Operating Relative HumidityAccording to ETSI 300 019-1-3 class 3.2 (0-95 %)
Storage Temperature-20 to +60 °C (-4 to 140 °F)

Physical Characteristics

WeightApprox 66 kg (145.5 lbs)
DimensionsW 440 D 557 H 173 mm
(W 17.3” D 21.9” H 6.9”)

Safety & Compliance

Circuit Breaker100 A, BMS Controlled, single pole
IP ClassIP20
Communication ProtocolsRS485, RJ45 (2) ports, Modbus
Safety StandardsIEC62619, IEC62368, UN38.3
Management & Monitoring Softwarefor PC (Studio) included for full local monitoring and management.
Remote connection via Modbus
*Cut off when one cell reaches 2.5 V, 14 cells in series. 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.
Contact Us

Contact us to find out more about Polarium Battery SLB48-250-146-2S