Description
BLUETTI's B300K is an expansion battery, not a power station: it has no inverter or AC sockets, and it is not listed by BLUETTI for the AC180P, AC70P or AC200PL. Battery level, status and firmware updates appear in the BLUETTI app through the connected station.
Connected to an AC300 or AC500 it charges from 5% to 80% in about 45 minutes.
What stands out
2,764.8Wh LiFePO4
Automotive-grade square cells with AI-BMS, 4,000+ cycles to 80% capacity.
For Apex 300, AC300, AC500, AC200L and AC200MAX
Up to six per Apex 300 or AC500, four per AC300, two per AC200L or AC200MAX.
Stacks under the Apex 300
Short CA90 connection cable included; same 525 x 327mm footprint.
Daisy-chain expansion
Two battery expansion ports, 58.4V DC, 90A max.
Charges through the station
AC, solar or car input of the host unit; 60A max charging current.
USB-A port
12W output for small devices.
Five-LED charge indicator
Each LED shows 20% state of charge; app monitoring via the station.
Key features
- Capacity: 2,764.8Wh LiFePO4, 4,000+ cycles
- Compatible with: Apex 300 (up to 6), AC500 (up to 6), AC300 (up to 4), AC200L and AC200MAX (up to 2)
- Expansion ports: 2 x 58.4V DC, 90A max
- Charging: Through the connected power station, 60A max
- Output: 1 x USB-A 12W
- Display: 5 LED charge indicators
- Weight: Approx. 29.5kg
- In the box: B300K battery, short battery connection cable CA90, user manual
