BLUETTI B500K Expansion Battery - 5,120Wh

BLUETTI B500K Expansion Battery – 5,120 Wh

P090A supplied, works will all natively expandable units apart from AC500.

Take your BLUETTI energy system to the next level with the BLUETTI B500K Expansion Battery — a high-capacity lithium battery module built for long-lasting backup power, extended runtime and scalable performance. Whether you’re preparing for extended power outages, living off-grid, powering an RV or building a robust home energy setup, this expansion battery gives you the freedom to store and use more energy without compromise.

Massive Capacity for Serious Energy Needs

Designed to complement compatible BLUETTI power stations, the B500K delivers an impressive 5,120 Wh of stored energy — enough to power lights, appliances, communication gear, laptops, tools and more for extended periods. This means fewer compromises on what you can run, and more confidence knowing you’re backed by substantial reserves when it matters most.

Reliable, Long-Life Performance

Built with advanced LiFePO₄ (lithium iron phosphate) battery cells, the B500K is engineered for durability and safety. Its robust chemistry and construction deliver 4,000+ charge cycles to 80 % capacity, giving you long-lasting performance that can span years of regular use.

Seamless Compatibility and Scalability

This expansion battery works seamlessly with a range of BLUETTI power stations — including models like the AC200L, AC200MAX, AC300, AC500 and Apex 300 — letting you scale your system as your energy needs grow. Want more capacity? You can expand even further toward 100 kWh+ by adding multiple B500K modules in larger setups.

Easy Installation and Flexible Setup

The B500K is designed with versatility in mind. Mount it to a wall or structural rack to save space, or pair it with a trolley setup for mobility around the home, workshop or campsite. Its standardized expansion ports and connection cables make installation straightforward.

Built for Real-World Conditions

Constructed with a durable internal frame and reliable cooling, the B500K is robust enough to handle everyday use in demanding environments — whether it’s stored in a garage, basement or powered setup.

Maximise your backup power, expand your off-grid plans and enjoy peace of mind knowing you’ve got energy when you need it. The BLUETTI B500K Expansion Battery is a smart addition for any serious power station system.

• Capacity: 5,120Wh
• Type: LiFePO₄ (Lithium Iron Phosphate)
• Life Cycles: 4,000+ cycle to 80% original capacity

GENERAL

• Compatibility: AC200L, AC200MAX, AC300, AC500, Apex300, B300K
• Weight: 45 kg / 99.21 lbs
• Dimensions (L x W x D): 520 × 327 × 308.5 mm / 20.47 × 12.87 × 12.15 in
• Charging Temperature: 0°C to 40°C / 32°F to 104°F
• Discharging Temperature: -20°C to 40°C (-4°F to 104°F)
• Storage Temperature: Up to 1 month: -20°C to 40°C (-4°F to 104°F)
  Up to 6 months: -20°C to 25°C (-4°F to 77°F)
• Working Humidity: 5% to 95%RH
• Charging Current: 65A Max.
• Discharging Current: 70A Max.
• 2 × Expansion Port: 58.4VDC Max., 90A Max.
• Warranty: 4 Years