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BLUETTI B500K1 5120Wh Expansion Battery, 5.12kWh LiFePO4 Module for Apex 300, AC300, and AC500 Home Backup Systems

BLUETTI B500K1 5120Wh Expansion Battery, 5.12kWh LiFePO4 Module for Apex 300, AC300, and AC500 Home Backup Systems

£1,750.00 GBP
£1,750.00 GBP
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The BLUETTI B500K1 Expansion Battery (B500K) is a heavy-duty energy storage module designed for large-scale home backup and off-grid solar systems. Boasting a massive 5,120Wh capacity, it is the highest-density expansion module in the BLUETTI lineup, offering nearly double the storage of the standard B300 series in a single unit.

Equipped with premium LiFePO4 cells, the B500K1 is built for longevity with a lifespan of over 4,000 cycles. Its advanced "Next-Gen Design Architecture 2.0" features a wireless internal layout that minimizes cabling, improving both reliability and thermal efficiency. This model is specifically designed for semi-permanent or mobile setups, featuring mounting holes for wall/rack installation and compatibility with BLUETTI’s heavy-duty trolleys.

Key Features

  • Massive 5.12kWh Capacity: A single unit provides enough energy to run critical home appliances (like a large refrigerator or well pump) for extended periods during an outage.

  • High Scalability: Designed for ambitious setups. When paired with the Apex 300 or AC500 systems, you can chain multiple units together to reach a staggering 100kWh of total storage.

  • Next-Gen Internal Architecture: The cable-free internal layout reduces failure points and makes the unit more compact and resilient to the vibrations of van life or travel.

  • Superior Cold Resistance: Engineered to perform in harsh conditions, maintaining a stable discharge even in temperatures as low as -20°C.

  • Universal Ecosystem Compatibility: Works seamlessly with the Apex 300, AC300, AC200L, and AC200MAX. It can also connect to the AC500 using a separate adapter cable.

  • Direct DC Charging Hub: When used with the optional Hub D1 accessory, the B500K1 can serve as a high-capacity 700W DC power hub for RVs or off-grid cabins.

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
Expansion Ports 2 × 58.4VDC (90A Max)
Operating Temp (Discharge) -20°C to 40°C
Operating Temp (Charge) 0°C to 40°C
Weight 45 kg
Dimensions (L×W×H) 520 × 327 × 308.5 mm

What’s in the Box?

  1. BLUETTI B500K1 Expansion Battery

  2. Battery Expansion Cable (P090A)

  3. User Manual & Warranty Card