Bluetti B500K Expansion Battery 5.12 kWh for Apex 300, AC200L, AC300
The Bluetti B500K expansion battery is a powerful companion for your energy storage needs, specifically designed for models like the Apex 300, AC200L, and AC300. With a capacity of 5.12 kWh, this battery provides ample power for various applications, making it ideal for outdoor adventures or home backup systems.

Key Features of the Bluetti B500K
This expansion battery boasts remarkable features that enhance its functionality. The B500K integrates seamlessly with compatible Bluetti devices, ensuring a smooth flow of energy. Its high capacity allows you to run multiple devices simultaneously without compromising performance.
Additionally, the modular design facilitates easy expansion, letting you add more batteries as your energy needs grow.
- Up to 100 kWh Massive Expansion
Increase your energy storage as needed, from 5.12 kWh to over 100 kWh*. The B500K battery is compatible with various BLUETTI power stations for easy, cost-effective upgrades. - Extend Your Backup Time
From outage protection to camping trips and off-grid working, the B500K keeps you powered for longer — more freedom and peace of mind. - Adapt to All Your Needs
The B500K either expands your BLUETTI power stations or serves as a high-capacity power bank with ecosystem components, delivering 700 W DC output for your devices.- Portable Power Station: The B500K works with old, existing, or future BLUETTI power stations and expansion batteries.
- Ecosystem:
- Home & Off-Grid: Harvest up to 4,000 W solar with SolarX 4K.
- Mobile Charging: Charge from your car and solar at 1,000 W with the Alternator Charger.
- DC Power Supply: Connect to Hub D1 for 700 W Max DC power.
- Made It Safe, Reliable, and Long-lasting
The B500K adopts advanced LiFePO₄ batteries for over a decade of safe use. Its third-gen wireless internal design and efficient cooling fan ensure stable performance, even in challenging conditions. - Fixed or Movable Setup
Secure the B500K to the wall or rack of your home or RV using its mounting holes, or attach it to the Foldable Trolley 2* for a mobile power supply.
Bluetti B500K Expansion Specifications

| Battery Info | |
|---|---|
| Model | B500K |
| Battery Type | LiFePO₄ (Lithium Iron Phosphate) |
| Battery Capacity | 5,120Wh |
| Cycle Life | 4,000+ cycles to 80% original capacity |
| General | |
| Weight | 45kg (99.21lbs) |
| Dimensions (L × W × H) | 520 × 327 × 308.5 mm / 20.47 × 12.87 × 12.15 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 | 65A Max. (Current may decrease outside specified temperatures) |
| Discharging Current | 70A Max |
| 2 × Expansion Port | 58.4VDC Max., 90A Max |
| Warranty | 4 Years |
| Compatibility | AC200L, AC200MAX, AC300, AC500, Apex 300, B300K |
Why Choose the Bluetti B500K for Your Setup?
Choosing the Bluetti B500K expansion battery means investing in durability and reliability. Its robust construction can withstand various conditions, and the intelligent battery management system ensures safety and longevity. Furthermore, with the ability to connect to the Apex 300, AC200L, and AC300, you’re guaranteed a versatile energy solution that adapts to your lifestyle.

Whether you’re camping or preparing for unexpected power outages, the B500K is a smart choice to keep your devices charged and operational.
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FAQs About Bluetti B500K Expansion Battery
- How to claim a warranty?
Once you receive your product, please register to claim your warranty on our website. - Why doesn’t the B500K drain all its power?
The B500K retains a portion of its energy to prevent overdischarging, which helps protect the battery’s lifespan and ensures long-term performance. - Can I leave the battery uncharged after fully discharging?
No, better to recharge it in time before its SoC drops to 1% to avoid potential damage. Plus, place it somewhere with a temperature of at least 10°C (50°F) for 12 hours before recharging. - Does the B500K support power bank mode?
No. - How many B500K batteries can l connect with AC300? Can l mix B500K/B300/B300S?
Up to 4 B500K batteries via the P090A cable. Yes, you can mix them. - How many B500K batteries can l connect with the Apex 300? Can l mix B500K/B300K/B300/B300S?
Up to 6 B500K batteries. Use the CA90 cable for B500K stacks and the P090A cable for more than 3 packs stacked separately. Yes, you can mix use 6 packs at most.



















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