BLUETTI B300K Expansion Battery — 2,764.8Wh LiFePO₄
The BLUETTI B300K expansion battery adds 2,764.8Wh of LiFePO₄ energy storage to compatible BLUETTI power systems. It is designed for customers who want longer backup runtime, more stored energy for off-grid use, or a modular way to expand an existing compatible system without replacing the main power station.
The B300K combines high-capacity energy storage, long-life LiFePO₄ battery chemistry, broad BLUETTI system compatibility and a standalone USB-A output. For Australian homes, mobile power setups and backup applications, it provides a practical way to scale stored energy as requirements grow.
Expandable power for home backup and off-grid use
The BLUETTI B300K expansion battery is built around a modular approach to energy storage. Instead of replacing an entire power system when more runtime is required, a compatible BLUETTI setup can add battery capacity as energy needs increase. This can be useful for home backup, camping, workshops, mobile applications and other situations where dependable stored energy matters.
- 2,764.8Wh battery capacity: substantial additional energy storage for compatible BLUETTI systems.
- LiFePO₄ chemistry: selected for durability, thermal stability and long cycle life.
- 6,000+ life cycles: the current BLUETTI Australia B300K product information specifies more than 6,000 cycles.
- Standalone USB-A output: useful for charging suitable small devices without requiring the main power station for every task.
- CA90 short cable included: this specific product configuration includes the CA90 short battery expansion cable.
Compatibility with BLUETTI power systems
Current BLUETTI Australia information lists the B300K for use with Apex 300 and also identifies compatibility with AC200L, AC200MAX, AC300 and AC500 systems. The BLUETTI B300K expansion battery therefore supports several different BLUETTI system configurations, but the correct connection cable still depends on the power station being used.
Important AC500 note: BLUETTI states that connection to AC500 requires a P090D-to-P150D cable, sold separately. The CA90 short cable included with this B300K SKU should not be assumed to cover every installation. Always confirm the connection requirements for the exact power station before completing the setup.
Built for long-term battery expansion
The B300K uses LiFePO₄ cells and BLUETTI battery-management technology. For an expansion battery that may be charged and discharged repeatedly over many years, cycle life and battery stability are especially important. The current manufacturer information specifies 6,000+ life cycles for the B300K.
The battery weighs approximately 29.5kg and measures approximately 52.5 × 32.7 × 20.9cm. Its installation location should therefore provide adequate space, ventilation and a suitable approach for lifting and positioning the unit.
Fast charging with compatible systems
When paired with compatible AC300 or AC500 systems, BLUETTI states that the B300K can reach up to 80% charge in approximately 45 minutes under supported charging conditions. Actual charging time can vary with the connected power station, charging input, battery state, temperature and system configuration.
For users who rely on stored energy during outages or extended off-grid operation, this charging capability can reduce the amount of time a battery bank remains at a low state of charge. The BLUETTI B300K expansion battery is therefore designed not only to add capacity but also to integrate with the charging capabilities of compatible BLUETTI systems.
Standalone USB-A power
The B300K is primarily an expansion battery, but it also provides a standalone USB-A output. This allows suitable small USB-powered devices to be charged directly from the battery when using the full power station would be unnecessary.
Key specifications
| Product | BLUETTI B300K Expansion Battery |
|---|---|
| Capacity | 2,764.8Wh |
| Battery chemistry | LiFePO₄ |
| Life cycles | 6,000+ (current BLUETTI Australia specification) |
| Approx. weight | 29.5kg |
| Approx. dimensions | 52.5 × 32.7 × 20.9cm |
| Standalone output | USB-A |
| Category | BLUETTI > Expansion Battery |
What’s in the box?
This BLUETTI B300K expansion battery configuration includes:
- 1 × B300K Expansion Battery
- 1 × CA90 Short Battery Expansion Cable
- 1 × User Manual
Frequently asked questions
How much capacity does the B300K add?
Each B300K provides 2,764.8Wh of battery capacity. The total supported expansion capacity depends on the compatible BLUETTI power station and the specific system configuration.
Which BLUETTI systems can use the B300K?
Current manufacturer information identifies Apex 300 as well as AC200L, AC200MAX, AC300 and AC500 compatibility. Connection accessories vary by system, so cable requirements should always be checked before installation.
Does the B300K include the cable required for AC500?
No. This SKU includes a CA90 short battery expansion cable. BLUETTI specifies that AC500 connection requires a P090D-to-P150D cable, sold separately.
Can the B300K be used by itself?
The BLUETTI B300K expansion battery includes a standalone USB-A output for suitable USB-powered devices, although its primary purpose is expansion of compatible BLUETTI power systems.
What battery chemistry does the B300K use?
The B300K uses LiFePO₄ battery chemistry, a technology widely used in modern energy-storage products because of its durability and stable cycling characteristics.
Manufacturer information and PR Solar support
For the manufacturer’s latest compatibility notes and product updates, refer to the
official BLUETTI Australia B300K product page.
For help selecting a suitable battery expansion setup, visit
PR Solar.
Specifications and compatibility information are based on current manufacturer information and should be checked against the final installation configuration before purchase or installation.
