SPECIFICATIONS

BLUETTI B300K Expansion Battery, a high-capacity LiFePO₄ module designed to extend runtime and flexibility for compatible BLUETTI power stations:

🔋 Technical Overview

• Battery Capacity: 2,764.8 Wh (51.2 V, 54 Ah) LiFePO₄ battery with over 4,000 life cycles to 80% capacity, translating to a service life of over 10 years.
   

• Outputs:

  • Includes a single USB‑A port (5 V/2.4 A, 12 W max)—handy for charging small devices during emergencies.
     

🔌 Compatibility & Connectivity

• Compatible Power Stations: Works with BLUETTI AC200L, AC200MAX, AC300, and AC500 models.
   

• Expandable Capacity:

  • Pairing two B300K units with an AC200MAX offers around 7,577 Wh total.

  • With an AC500, users can combine up to 6 units and even mix with other expansion packs (e.g. B300, B300S), reaching up to 33 kWh capacity.
     

• Connection Cable: Ships with a P090A expansion cable; for use with AC500, a separate P090D-to-P150D cable may be needed.
   

⏱️ Recharging Behavior

• When linked to compatible units like AC300 or AC500, the B300K charges up to 80% in about 45 minutes using dual-input methods.
   

• All charging is handled by the power station—it can be recharged via AC wall outlet, solar the host supports, or generator input.

⚙️ Physical & Environmental Specs

• Dimensions: 20.67 × 12.87 × 8.23 in (525 × 327 × 209 mm)

• Weight: ~65 lb (29.5 kg)
   

• Operating Conditions:

  • Charging Temp: 0 °C to 40 °C (32 °F to 104 °F)

  • Discharging Temp: –20 °C to 40 °C (–4 °F to 104 °F)

  • Storage:

    • Up to 1 month: –20 °C to 40 °C

    • Up to 6 months: –20 °C to 25 °C
       

• Charge/Discharge Limits: Max charging current ~60 A; discharge current ~70 A via the expansion port.
   

Advantages

• Massive 2.76 kWh capacity for daily or emergency use.

• Very long cycle life with safe, automotive-grade LiFePO₄.

• Scalable: combine multiple units for huge off-grid or backup setups.

• Compact and stack-friendly design with improved mobility.

📊 Summary Table

🔧 Final Thoughts

The BLUETTI B300K is a premium expansion battery offering robust performance, exceptional longevity, and powerful compatibility with BLUETTI's heavy-duty power stations. It's ideal for users seeking scalable off-grid power solutions or extensive home backup systems.