Bluetti B500K Expansion Battery

BLUETTI B500K EXPANSION BATTERY (5120Wh)

The Titan of Modular Storage

The BLUETTI B500K is a heavy-duty, high-capacity expansion battery designed to push the limits of your modular power system. Boasting a massive 5,120Wh capacity in a single unit, it is the highest-density expansion module in the BLUETTI lineup. Built for those who require serious, long-term energy independence—such as whole-home backup, off-grid cabins, or large-scale mobile workshops—the B500K is a “plug-and-play” solution that allows your system to grow as your energy needs evolve.

Key Features

• Ultra-High Energy Density: With 5.12kWh per pack, one B500K offers nearly double the energy of the B300K. This allows you to achieve massive storage totals with fewer units, saving both floor space and cable clutter.

• Massive Scalability: The B500K is the foundation of BLUETTI’s most ambitious setups. When paired with the Apex 300 or AC300/AC500 systems, you can chain multiple units together to reach a staggering 100kWh of total storage—enough to power a home for days or even weeks.

• Superior LiFePO4 Longevity: Equipped with advanced Lithium Iron Phosphate cells, the B500K is rated for 4,000+ life cycles (to 80% capacity). This translates to over a decade of reliable service even with heavy daily use.

• Universal Ecosystem Compatibility: The B500K is designed for seamless integration across the BLUETTI range. It works natively with the Apex 300, AC300, AC200L, and AC200MAX. Note: Connection to the AC500 requires a separate P150D adapter cable.

• Next-Gen Internal Architecture: Featuring a “wireless” internal structure, the B500K is built for durability. The reduction in internal cabling minimizes failure points and improves thermal efficiency, ensuring stable performance in temperatures ranging from -20°C to 40°C.

• Direct DC Power Hub: Beyond being a simple “slave” battery, the B500K can function as a high-capacity power bank for DC devices when used with ecosystem accessories like the Hub D1, delivering up to 700W of DC output.

Technical Specifications