BLUETTI B500K2 5120Wh Expansion Battery, 5.12kWh LiFePO4 Module with 90-Degree Space-Saving Cable for Home Backup
BLUETTI B500K2 5120Wh Expansion Battery, 5.12kWh LiFePO4 Module with 90-Degree Space-Saving Cable for Home Backup
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
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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.
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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.
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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.
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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.
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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.
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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?
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BLUETTI B500K2 Expansion Battery
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90-Degree Battery Expansion Cable
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User Manual & Warranty Card