BLUETTI
BLUETTI B300K Expansion Battery for Apex 300 - 2,764.8Wh
BLUETTI B300K Expansion Battery for Apex 300 - 2,764.8Wh
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Product Overview
The BLUETTI B300K is a 2,764.8Wh LiFePO4 expansion battery designed to increase the storage capacity of a compatible BLUETTI power system.
Important Compatibility Notice: This listing is the B300K package for the BLUETTI Apex 300 and includes the CA90 battery connection cable. Other compatible BLUETTI power stations may require a different connection cable sold separately.
The B300K is not a standalone AC portable power station. It does not include household AC outlets, although its built-in USB-A port can provide limited 12W USB power.
Key Features
- 2,764.8Wh battery capacity
- 51.2V, 54Ah battery configuration
- LiFePO4 lithium iron phosphate battery chemistry
- 6,000+ charge cycles to 80% remaining capacity
- 12W USB-A port for compatible USB-powered devices
- Two battery expansion ports
- CA90 connection cable included for use with the BLUETTI Apex 300
Best For / Intended Use
- Expanding the capacity of a BLUETTI Apex 300 system
- Home backup configurations using a compatible BLUETTI power station
- RV and off-grid power systems using compatible equipment
- Customers who need additional stored energy for an existing BLUETTI system
What Is Included
- BLUETTI B300K expansion battery × 1
- CA90 battery connection cable × 1
- User manual × 1
Technical Specifications
| Model | B300K |
|---|---|
| Battery Capacity | 2,764.8Wh |
| Voltage and Capacity | 51.2V, 54Ah |
| Battery Chemistry | LiFePO4 lithium iron phosphate |
| Cycle Life | 6,000+ cycles to 80% remaining capacity |
| Maximum Charging Current | 60A |
| Maximum Discharging Current | 70A |
| Expansion Ports | 2 × battery expansion ports, 58.4V DC maximum, 90A maximum |
| USB-A Output | 12W maximum, 5V/2.4A |
| Dimensions | 20.67 × 12.87 × 8.23 inches (525 × 327 × 209mm) |
| Weight | Approximately 65.04 lb (29.5kg) |
| Charging Temperature | 32°F to 104°F (0°C to 40°C) |
| Discharging Temperature | -4°F to 104°F (-20°C to 40°C) |
| Storage Temperature — Up to 1 Month | -4°F to 104°F (-20°C to 40°C) |
| Storage Temperature — Up to 6 Months | -4°F to 77°F (-20°C to 25°C) |
| Working Humidity | 5% to 95% RH |
Setup and Compatibility
This package includes the CA90 cable for connecting the B300K to a BLUETTI Apex 300 or another appropriately configured B300K battery.
The B300K battery is also compatible with selected BLUETTI AC200L, AC200MAX, AC300, and AC500 systems. Those configurations may require a different battery connection cable. Confirm the required cable and system configuration before ordering.
Follow the BLUETTI user manuals for battery placement, cable connection, expansion limits, charging, firmware updates, storage, and operation.
Shipping and Delivery
This item ships directly from our fulfillment partner or manufacturer.
Freight charges are calculated at checkout.
Estimated Delivery:
- Processing: 1–2 business days
- Delivery: 5–10 business days depending on location
Oversized or high-value items may require additional handling or scheduled delivery.
Tracking information will be provided once your order ships.
See our Shipping Policy for full details.
Warranty and Returns
Warranty service and returns are subject to the applicable manufacturer terms and RoboSmartDepot’s current Warranty and Refund policies. Review those policies before ordering.
Safety, Compliance, and Important Notes
- This product contains a lithium battery.
- This is an expansion battery and does not provide household AC output by itself.
- Use only with compatible BLUETTI equipment and the correct battery connection cable.
- Do not connect, charge, operate, or store the battery contrary to the manufacturer’s instructions.
- Do not use the battery if it or its connection cable appears damaged.
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