Expand your energy storage effortlessly with the Bluetti B300K Expansion Battery, designed to integrate seamlessly with Bluetti’s advanced solar power stations, including the EP600 and other modular Bluetti systems. Built with durable LiFePO₄ (Lithium Iron Phosphate) chemistry and engineered for long-term use, the B300K delivers high-capacity, high-efficiency performance for residential, off-grid, or backup energy needs.
Whether you're powering a cabin, home, or mobile setup, the B300K gives you reliable, expandable storage for total energy independence.
Each Bluetti B300K battery offers 3,072Wh (3.072kWh) of energy capacity, using premium LiFePO₄ cells known for their long cycle life, safety, and thermal stability. With over 3,500+ cycles to 80% capacity, this battery is designed to last for years, even under daily cycling conditions.
Capacity: 3,072Wh per unit
Battery Chemistry: Lithium Iron Phosphate (LiFePO₄)
Cycle Life: 3,500+ cycles at 80% depth of discharge
Modular Design: Stackable or expandable with additional B300K units
Intelligent BMS: Built-in Battery Management System for real-time protection and monitoring
Connectivity: CAN and RS485 communication protocols for seamless Bluetti integration
The B300K is built for modular solar systems, allowing you to increase your energy storage based on your growing power demands. Whether you start with one or several, the battery is designed to be connected in parallel with multiple units.
Whole-home battery backup systems
Off-grid solar installations
Grid-tied hybrid systems with energy storage
RV, cabin, or mobile energy setups
Adding runtime to existing Bluetti EP600 systems
When paired with the right inverter and solar array, the B300K becomes a core component of a fully scalable and autonomous solar power solution.
The Bluetti B300K is specifically designed to integrate with Bluetti’s modular systems such as the EP600, allowing users to scale energy storage capacity with zero guesswork. Simply plug into the main power station via dedicated expansion ports and benefit from intelligent communication between the battery and inverter system.
Thanks to built-in CAN/RS485 communication, the B300K ensures safe voltage and current regulation, real-time data sharing, and coordinated charge/discharge cycles, maximizing overall system performance and longevity.
Built for flexibility, the B300K’s rugged enclosure is compact and designed to be installed indoors or in protected utility environments. The heavy-duty exterior protects internal components while maintaining a clean, low-profile form factor ideal for wall-mount or floor-stack installation.
With advanced BMS protections, including over-voltage, over-current, temperature, and short-circuit protection, the B300K operates safely under a wide range of environmental conditions. It requires zero maintenance and no active cooling, making it a quiet, passive, and worry-free energy storage solution.
Expandable energy storage tailored to your needs
Ideal for full or partial off-grid homes
Perfect match for Bluetti EP600 and modular systems
High-performance LiFePO₄ chemistry
Safe, silent, and smart operation
Long lifespan and industry-grade reliability
Whether you're prepping for emergencies, powering off-grid adventures, or optimizing your solar energy usage, the Bluetti B300K Expansion Battery gives you the flexibility, safety, and scalability you need. Add one or several to your Bluetti system and unlock next-level energy control, backed by proven lithium technology and Bluetti’s trusted engineering.
Need help choosing the right battery setup or pairing it with your power station? Contact our team today for expert advice and recommendations tailored to your specific application.
