The BLUETTI B300K2 Expansion Battery Enhance Your Home Energy Solutions
Modular LiFePO₄ capacity to extend AC300, AC500, and APEX 300 power systems
Add dependable runtime to your home backup or mobile setup with the BLUETTI B300K2 Expansion Battery. Engineered around a 51.2V, 54Ah LiFePO₄ pack, the B300K2 delivers 2,764.8Wh of usable capacity per module with a long service life (rated 4,000+ cycles to 80 percent). Pair it with a BLUETTI AC300, AC500, or APEX 300 to scale storage for outages, time-of-use shifting, or off-grid work—while its integrated USB-A (12W) lets you top up small devices directly in a pinch. With a durable aluminum enclosure, advanced battery management, and stack-friendly design, the BLUETTI B300K2 Expansion Battery brings flexible, future-ready storage to cabins, RVs, and home systems alike.
IMPORTANT NOTES:
- To connect to AC500, you need P090D to P150D cable and CA90 short cable.
- To connect to AC300, you need P090A Long cable and CA90 short cable.
- The above-mentioned cables are no longer available for purchase and no longer manufactured by Bluetti.
How the BLUETTI B300K2 Expansion Battery Makes a Difference
The BLUETTI B300K2 stands apart from typical expansion batteries by functioning as an independent power source. Featuring a built-in USB-A port, it lets you charge important devices such as smartphones, tablets, or fans directly. Perfect for blackouts or outdoor adventures, it ensures reliable power whenever and wherever you need it.
With its compact, stackable form and plug-and-play ease, the BLUETTI B300K2 offers extensive energy scalability, reaching up to 33,177.6Wh when paired with the AC500. This flexibility lets you customize your power system precisely to your needs, whether safeguarding your home or powering equipment off-grid.
Features
Massive Energy Capacity for Every Need
Boasting a robust 2,764.8Wh capacity, the BLUETTI B300K2 provides dependable energy backup for daily needs and emergencies alike, allowing you to keep essential devices running and stay comfortable without disruption.
Unmatched Battery Longevity with LiFePO₄ Technology
Equipped with a top-quality LiFePO₄ battery, the BLUETTI B300K2 offers more than 4,000 life cycles. This advanced technology ensures enhanced durability and safety, delivering dependable power and lasting peace of mind.
Effortless Integration for Seamless Compatibility
The B300K2 seamlessly integrates with AC300, AC500, and APEX 300 portable power stations, enabling you to boost your system’s capacity up to an impressive 33,177.6Wh. Effortlessly scale your power solution as your energy demands increase.
Versatile Adaptability for Tailored Energy Solutions
Compatible with B300, B300K, and B300S models, the B300K2 offers stackable flexibility to suit your specific energy requirements, whether at home or on the go. Tailor your power system and stay confident knowing you’ll always have the energy you need.
Built Tough with Superior Safety and Reliability
Built with a sturdy aluminum shell and cutting-edge AI-BMS technology, the B300K2 is designed to endure demanding environments. Its state-of-the-art wireless systems and cooling mechanisms ensure reliable and safe performance in every situation.
Convenient USB Port for Essential Device Charging:
Stay powered wherever you are with the B300K2's built-in USB-A port. Ideal for charging phones, tablets, and small devices, it guarantees you won’t run out of essential power when it matters most.
What's Included
- 1 x BLUETTI B300K2 Expansion Battery
- 1 x Battery Expansion Cable (CA90)
- 1 x CA90 Short Cable
- 1 x User Manual
Warranty
BLUETTI provides a 3-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
Specifications
Battery Specifications
|
| Model |
B300K2 |
| Battery Capacity |
2,764.8Wh (51.2V, 54Ah) |
| Battery Type |
LiFePO₄ (Lithium Iron Phosphate) |
| Cycle Life |
4,000+ cycles (to 80% capacity) |
Output Specifications
|
| USB-A Output |
12W Max., 5V / 2.4A |
| Total Capacity |
2,764.8Wh |
General Specifications
|
| Weight |
29.5kg (65.04lbs) |
| Dimensions (L×W×H) |
52.5 × 32.7 × 20.9 cm (20.67 × 12.87 × 8.23 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 |
60A Max (may reduce outside optimal temperatures) |
| Discharging Current |
70A Max |
| Expansion Ports |
2 × Ports, 58.4VDC Max., 90A Max |
| Compatibility |
AC300, AC500, APEX 300 |
Manual
