Expand Your Energy Storage. Extend Your Backup Power.
The BLUETTI B300K Expansion Battery adds 2,764.8Wh of energy storage to compatible BLUETTI power systems, giving you a straightforward way to increase available runtime without replacing your existing system.
Built with durable LiFePO₄ (LFP) battery chemistry, the B300K is designed for long-term energy storage applications ranging from emergency home backup to RV and off-grid power.
Its modular design allows compatible BLUETTI systems to grow alongside your energy needs. Pair the B300K with the BLUETTI Apex 300 or other supported BLUETTI power systems to increase total battery capacity and keep essential equipment operating longer when grid power isn't available.
At approximately 65.3 lb, the B300K packages substantial additional storage into a compact expansion module designed to integrate directly with compatible BLUETTI equipment.
Key Features: 2,764.8Wh capacity • LiFePO₄ battery chemistry • modular expansion design • compatible with BLUETTI Apex 300 and select BLUETTI systems • suitable for home backup and off-grid applications • approximately 65.3 lb • compact stackable design.