BLUETTI B500K Expansion Battery | Compatible With Apex 300/AC300/200L | 5120Wh

The BLUETTI B500K Battery Delivers 5.12kWh of Expandable Power For Decades Of Reliable Home And Off-Grid Energy

When the grid goes down or you're miles from the nearest outlet, you need backup power you can count on not just for the next few hours, but for years to come. The BLUETTI B500K Battery is engineered to provide exactly that: a massive 5,120Wh expansion battery that scales with your energy needs, integrates seamlessly with your existing BLUETTI ecosystem, and delivers over a decade of dependable performance through all of life's adventures and emergencies.

The B500K connects seamlessly with Apex 300, AC300, and AC200L. You're not locked into one setup, giving you freedom to upgrade or change your system without replacing expensive batteries you've already purchased.

BLUETTI B500K Expansion Battery Features

This battery stores enough power to last over ten years

The B500K uses advanced LiFePO₄ battery cells rated for more than 4,000 charge cycles. That means you can rely on consistent, safe performance for roughly a decade before capacity begins to fade, making this a smart long-term investment in energy independence.

Expand your power storage from small backup to whole-home coverage

Start with 5.12kWh and grow up to 100kWh by adding more batteries and power stations. This flexibility lets you build the exact system you need today and expand it later as your energy needs or budget grows over time.

Built tough to handle bumps, drops, and real-world rough use

The third-generation wireless internal frame design resists damage from vibration, impacts, and movement better than traditional batteries. Whether you're traveling rough roads in an RV or moving it between locations, the B500K handles the stress without breaking down.

Mount it on the wall or roll it wherever power is needed

Install the B500K permanently using built-in mounting holes, or attach it to a foldable trolley for easy mobility. This dual-purpose design gives you both space-saving fixed installation and portable power delivery depending on what your situation requires.

Smart cooling keeps it safe even during heavy power demands

An efficient built-in cooling fan maintains safe operating temperatures when you're pulling lots of power in hot conditions. This thermal management protects the battery and ensures reliable performance whether you're running air conditioning during summer outages or powering tools on jobsites.

Silent, clean power without the noise and fumes of generators

Unlike gas generators that create noise pollution and toxic exhaust, the B500K operates completely silently with zero emissions. You can safely use it indoors, run it overnight without disturbing anyone, and power your home or RV without breathing harmful fumes.

BLUETTI B500K Expansion Battery Warranty

BLUETTI provides a 4-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.

What's Included

• 1 x BLUETTI B500K Expansion Battery
  
• 1 x CA90* Battery Expansion Cable
• 1 x User Manual

Frequently-Asked Questions

Why doesn't the B500K drain all its power?

The B500K retains a portion of its energy to prevent over discharging, which helps protect the battery's lifespan and ensures long-term performance.

Can I leave the B500K 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 use them.

How many B500K batteries can l connect with 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.

BLUETTI B500K Expansion Battery Manual