Bluetti B500K1 Expansion Battery 5120Wh for AC500

The Bluetti B500K1 Expansion Battery (MPN P-B500K1-EU-GY-10) is the ideal solution for flexibly expanding the capacity of your AC500 Power Station. With a capacity of 5,120Wh, the B500K1 provides sufficient energy for a wide range of applications and easily adapts to your energy needs. Thanks to its durable LiFePO4 technology and prismatic cells, the B500K1 delivers reliable performance in any situation. The integrated AI BMS technology ensures optimal protection and high efficiency. In addition, pass-through charging support allows simultaneous charging and discharging, so you can access a stable power source at any time.

Highlights - B500K1 expansion battery

• Enormous capacity of 5,120Wh
• Modular and expandable
• Extended service life with automotive-grade LiFePO4 battery
• Wall mounting possible

Integrated USB-A port

Thanks to the integrated USB-A port, the B500K1 allows DC devices to be charged directly via USB. For AC charging, a combination with a power station is required.

Compatibility

The B500K1 expansion battery is compatible with the AC500, AC300, AC200L, and Apex 300 power stations. Together, they ensure fast charging times and simultaneous power supply to multiple devices, ideal for everyday use and outdoor activities. A separately available P090D to P150D cable is required for connection to the AC500.

Difference between K1 and K2 variants

The K1 variant comes with a long connection cable and is specially designed for flexible mounting and connection to various power stations (e.g., AC500, AC300, AC200L, Apex 300). In contrast, the K2 variant is equipped with a short connection cable and is particularly suitable for space-saving surface mounting and direct connection of several batteries to each other or to the Apex300. The K1 version is recommended for maximum compatibility with various power stations.

Expandability and modularity

Up to 8 B500K1 expansion batteries can be combined in a modular fashion to increase the total capacity to up to 40,960Wh (maximum expansion level, see manufacturer's specifications) as needed. Expansion is simple and flexible, allowing you to customize your power supply.

Total capacity

• AC200L 1-2 days: 7,168Wh max.
• AC300 2-phase system: 20,480Wh max.
• AC500 2-phase system: 40,960Wh max.
• Apex 300 with B500K1: 7,884.8Wh max.

Fast charging time

When used with the AC300 or AC500, the B500K1 charges to a high charge level in a short time. This fast charging time is particularly advantageous when you need to complete important work, activities, or emergencies without major interruptions.

Installation

The battery is easy to install, both for use at home and in a motorhome, and its efficient thermal management ensures smooth operation even during intensive use thanks to heat dissipation.

Efficient heat management

Efficient heat management protects the battery from overheating and contributes to its longevity. Even with intensive use, operation remains safe and reliable.

Discharge

The B500K1 has an energy reserve that prevents over-discharging. This extends the battery's service life and ensures long-term performance.

What is AI-BMS?

The integrated AI-BMS (battery management system) monitors the battery in real time and reliably protects it from overcharging, overheating, and other risks—for maximum safety and a particularly long service life.

Advantages of prismatic cells

Prismatic cells offer particularly high safety and stability in operation, which makes the battery more resistant to external influences and further increases its service life.

Technical data

• Battery capacity: 5,120 Wh
• Battery type: LiFePO4
• Prismatic cells for increased safety
• Life cycles: 4,000+ cycles
• Max. charging current: 60A
• Max. discharge current: 70A
• 2x expansion port: 51.2VDC max., 90A max.
• USB-A: 12W max., 5V / 2.4A
• Charging temperature: 0°C - +40°C
• Discharge temperature: -20°C to +40°C
• Relative humidity: 5% to 95%
• Dimensions: 525 x 327 x 276 mm
• Weight: 45 kg

Scope of delivery

1x Bluetti B500K1 expansion battery
1x P090A battery extension cable