The BLUETTI B500K2 Expansion Battery is the space-optimized version of the high-capacity B500K module. Designed for users with limited installation depth, the "K2" model features a specialized 90-degree stackable connection cable. This allows the unit to be placed flush against walls or inside narrow cabinets without the expansion cables protruding from the side, making it the perfect choice for tidy home backup systems and space-conscious RV or van conversions. With a massive 5,120Wh capacity, the B500K2 uses ultra-reliable LiFePO4 cells and the latest wireless internal architecture. This modular powerhouse can be combined with others to reach up to 100kWh of storage, providing a scalable solution that grows with your energy needs. Key Features Low-Profile 90° Connection: The right-angle connector and side-mounting orientation minimize the footprint, allowing you to stack batteries in tight spaces where standard cables wouldn't fit. Massive 5.12kWh Capacity: A single module provides enough power to support critical home circuits or high-wattage appliances for extended durations during an outage. Extreme Scalability: Part of the modular ecosystem, this unit can be daisy-chained with other B500 series batteries to create massive energy reservoirs for full off-grid independence. Rugged Wireless Architecture: The internal components are connected without messy wiring, which reduces heat, improves safety, and makes the unit more durable against the vibrations of mobile life. Cold-Weather Performance: Engineered to handle the elements, this battery can reliably discharge in temperatures as low as -20°C, ensuring your power stays on even in harsh winter conditions. Smart AI-BMS Management: The intelligent Battery Management System constantly monitors individual cell health, balancing voltage and current to ensure a 10+ year lifespan. Technical Specifications Specification Details Battery Capacity 5,120Wh (5.12kWh) Battery Type LiFePO4 (Lithium Iron Phosphate) Life Cycles 4,000+ Cycles to 80% Capacity Max Charging Current 65A Max Discharge Current 70A Connection Type 90-Degree Stackable Plug Compatibility Apex 300, AC300, AC200L, AC200MAX (AC500 via adapter) Operating Temp (Discharge) -20°C to 40°C Weight 45 kg (99.2 lbs) Dimensions (L×W×H) 520 × 327 × 308.5 mm What’s in the Box? BLUETTI B500K2 Expansion Battery 90-Degree Battery Expansion Cable User Manual & Warranty Card
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