Product Description

Add more runtime to your power system with the BLUETTI B300K2 Expansion Battery. This 2,764.8Wh automotive-grade LiFePO₄ battery block plugs into your BLUETTI Apex 300 (and other compatible stations) to dramatically extend backup time for home, RV, and off-grid setups — stack multiple units to scale capacity all the way up to 100kWh.

Built to last with EV-grade cells rated for 6,000+ charge cycles to 80% capacity, the B300K2 recharges to 80% in as little as 45 minutes when paired with a compatible power station. A built-in USB-A port even lets it top off phones and small devices on its own.

Rugged, stackable, and simple to connect, it’s the easy way to grow your energy reserve as your needs change — backed by a 3+1 year warranty.

Key Features

  • 2,764.8Wh automotive-grade LiFePOâ‚„ battery (51.2V, 54Ah)
  • 6,000+ cycles to 80% capacity
  • Expand up to 100kWh when connected with the Apex 300
  • 0–80% in ~45 minutes with a compatible power station
  • Built-in USB-A port (12W) for standalone device charging
  • Stackable, rugged design for home or mobile use

Compatibility

  • BLUETTI Apex 300, AC300, AC500, AC200L, AC200MAX

Specifications

Capacity 2,764.8Wh (51.2V / 54Ah)
Battery Chemistry Automotive-grade LiFePOâ‚„ (6,000+ cycles)
Output Port 1 × USB-A (12W max, 5V/2.4A)
Max Expansion Up to 100kWh with Apex 300
Recharge 0–80% in ~45 min (with compatible station)
Weight 65.04 lbs (29.5 kg)
Dimensions 20.67 × 12.87 × 8.23 in
Warranty 3 + 1 Years

Customers also bought