Expand Your Off-Grid Power Capacity

Enjoy greater energy storage for your adventures and backup power needs with this high-capacity expansion battery. Designed to integrate with compatible BLUETTI power stations, it provides additional stored energy for extended use away from mains electricity.

With a substantial 2,764.8Wh capacity and Lithium Iron Phosphate (LiFePO₄) battery technology, it is suited to off-grid living, caravan travel, camping and home backup applications.

High-Capacity Lithium Storage

The battery offers 2,764.8Wh of energy storage, using a 51.2V, 54Ah LiFePO₄ battery configuration.

Key features include:

2,764.8Wh capacity for additional stored energy.
LiFePO₄ battery chemistry for durable, rechargeable energy storage.
Expandable power system when connected to a compatible BLUETTI power station.
Built-in USB-A output for charging compatible small electronic devices.
Designed for versatile use at home, on the road or at your campsite.

Designed for the BLUETTI Apex 300

This model is designed to expand the capacity of the BLUETTI Apex 300 power station, allowing you to store more energy for longer trips and greater backup-power requirements.

The Apex 300 can support up to six B300K expansion batteries, providing a combined maximum battery capacity of 19,353.6Wh when configured with six units. This makes it possible to build a larger energy storage system to suit your requirements.

Use the correct compatible battery connection cable and follow BLUETTI’s connection instructions. Check which cable version is supplied with your selected model, as cable requirements can vary between configurations.

Ideal for Camping, Caravanning and Home Backup

Additional battery capacity can help support your energy needs when access to mains electricity is limited.

Potential applications include:

Caravans and motorhomes
Extended camping and 4WD touring
Off-grid cabins and sheds
Solar-powered energy storage systems
Backup power for compatible household equipment
Longer stays at remote campsites

Actual runtime depends on the equipment being powered, power consumption, conversion losses and the capacity available in your complete system.

Convenient USB-A Charging

The built-in USB-A port provides an additional option for charging compatible smaller devices, with an output rated at up to 12W (5V/2.4A). This offers added convenience when charging suitable electronics.

Battery Specifications

Battery capacity: 2,764.8Wh
Battery configuration: 51.2V, 54Ah
Battery chemistry: LiFePO₄ (Lithium Iron Phosphate)
USB-A output: Up to 12W
Weight: Approximately 29.5kg
Dimensions: 52.5 × 32.7 × 20.9cm
Compatibility: BLUETTI Apex 300 and other specifically supported BLUETTI power stations

Build a More Capable Power System

Whether you’re preparing for longer off-grid trips or increasing your backup energy storage at home, this expansion battery provides a practical way to increase the capacity of a compatible BLUETTI setup.

For safe and reliable operation, use compatible equipment and cables, follow the manufacturer’s connection instructions, and check the power station’s requirements before expanding your system.

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BLUETTI B300K Expansion Battery for Apex 300 – 2,764.8Wh

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