AkuBox LiFePO4 345Ah 51.2V CAN 2.0/RS485 Stackable (PREO-VII26)

AkuBox LiFePO4 345 Ah 51.2 V CAN 2.0/RS485 Stackable

The high-capacity AkuBox 345 Ah / 51.2 V battery combines a set of high-performance prismatic LiFePO4 cells with advanced Jikong (JK) BMS technology. This combination ensures precise active balancing and comprehensive cell protection, making the AkuBox the optimal solution for modern photovoltaic systems (PV).

Thanks to its high reliability and modular design, the storage capacity can be scaled as needed—up to 15 units can be connected in parallel, meeting the needs of both single-family homes and larger commercial buildings.

Key Features: 

• Integrated Smart BMS with active balancing: Unlike conventional passive systems, it actively balances the voltage between cells, thereby maximizing usable energy and significantly extending the battery’s service life.
• Wide system compatibility: The AkuBox features CAN 2.0 and RS485 communication ports, ensuring seamless integration with leading solar inverters (Must, Victron Energy, Growatt, GoodWe, DEYE, and others).
• Maximum safety and durability: The certified cells are protected by a robust cold-rolled steel (SPPC) chassis with an IP40 rating. An integrated DC circuit breaker is mounted on the front panel for overcurrent protection.
• Battery Monitoring and Management: The front panel features an LCD display for instant diagnostics and configuration of communication protocols for interfacing with inverters.
  
  

Technical Specifications:

• Nominal voltage: 51.2V
• Nominal capacity: 345 Ah
• Energy: 14336 Wh
• Communication: CAN2.0 / RS232 / RS485
• Connectivity: Bluetooth
• Active balancing: YES
• Internal resistance: ≤ 45 mΩ @ 50% SOC
• Efficiency: > 96%
• Number of cycles / lifespan: > 8,000 @ 70% DoD 25 °C
• Number of parallel-connected modules: up to 15
• Charging current: 85 A
• Maximum charging current: 90 A
• Charging voltage: 28.00 V
• BMS charge cut-off voltage: < 28.80 V (3.60 V / cell)
• Recharge cut-off voltage: > 27.2 V (3.4 V / cell)
• Balancing voltage: < 27.60 V (3.45 V / cell)
• Maximum continuous discharge current: 100 A
• Maximum discharge current (3 seconds): 120 A
• BMS discharge current: 300 A / (300 ms)
• Switching voltage for balancing: 27.60 V (3.45 V / cell)
• Cut-off voltage for discharging: 22.40 V (2.8 V / cell)
• BMS cut-off voltage: > 21.60 V (2 s) (2.7 V / cell)
• Recharge cut-off voltage: > 24.80 V (3.1 V / cell)
• Short-circuit protection response time: 250 μs ~ 500 μs
• Certifications: CE (battery), UN38.3 (battery), UL1642 & IEC62133 (cells)
• Transport classification: UN 3480, Class 9
• Dimensions (W x H x D): 440×250×750 mm
• Weight: 135 kg (153 kg with packaging)
• Terminal tightening torque: 9 Nm ~ 11 Nm
• Housing material: SPPC
• Protection rating: IP 40
• Operating temperature / discharge: -20 °C ~ 55 °C
• Operating temperature / charging: 0 °C ~ 45 °C
• Storage temperature: -5 °C ~ 35 °C
• BMS disconnection temperature limit: 55 °C
• BMS reconnection temperature: 45 °C
• Assembled from Grade A+ cells

ℹ️ Multiple batteries cannot be connected in series.

❗ The BMS is factory-set to specific parameters. Any unauthorized tampering or modification of the set parameters will result in permanent damage to the product and voiding of the warranty.

Mobile App for Jikong BMS

1. Monitor the voltage of individual battery cells, current, temperature, and other parameters in real time. This Smart BMS features built-in Bluetooth technology, allowing you to control and monitor your battery directly from your smartphone or tablet. To download the app, use the QR code below or the links provided in the article“How to Use the Jikong BMS App.”

❓Will this battery work with your inverter?Check out thiscompatibility chart.