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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.
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
Common Customer Questions
Get answers to the most frequently-asked questions customers ask before placing an order.
Is Outbound Power an Authorized Dealer?
Yes! Outbound Power is an Authorized Dealer for every single brand and product on our store.
How long will it take for my order to arrive?
Shipping times vary depending on your location and the product or products ordered.
Order Processing Time Most products are processed within 1-3 business days. If there is a delay in processing your order, we will alert you with as much information as possible about what to expect.
After order processing is complete, you will receive tracking information to monitor your order while it is in transit.
Order Shipping Time Following processing, it may take between 3 and 8 days to arrive, depending on your location.
Please refer to the product page for your item and reference the estimated delivery time frame for more details.
Additionally, you can see the estimated delivery time frame during checkout and receive a tracking number once your order ships.
What are your shipping rates? Do you offer free shipping?
Everything on our store ships for free. Really!
What is Outbound Power's return policy?
Most items may be returned within 30 days of delivery. Please refer to our Returns & Exchanges policy to determine what items are eligible. Returns are not accepted beyond 30 days following delivery.
Are Outbound Power products used/old/refurbished?
Everything sold on our website is brand-new.
Do you price match?
No — we price BEAT! Please refer to our Price Beat Promise for full details.
Exactly as advertised. Bought batteries from numerous other vendors and they were not a replacement for the Onan generator as advertised. Nice to find a company that is honest and real! Definitely be buying from them in the future.
Hi Cliff, thank you for your kind words and trust in our products. We’re delighted to hear that our battery met your expectations. We look forward to serving you again in the future!
Thank you for insurance coverage for my jackery plus 5000 solar generator goddess
Thank you for your kind review! We’re glad we could help with coverage for your Jackery 5000 Plus and appreciate you choosing Outbound Power. We hope it gives you plenty of confidence and peace of mind for years to come!
Very good service. Recommend this vendor and product
Thank you so much for your kind words! We're delighted to hear you're happy with the service and your new Pecron. We appreciate your recommendation and hope to be of service again!
So far so good haven't permanently mounted them yet let you know in 1 month
Hi William, thanks for your update! We're glad to hear you're satisfied so far. Looking forward to hearing how your panels perform after a month. Feel free to reach out anytime!
Hi Greg, thank you for your positive feedback! We're glad the EcoFlow Solar Extension Cable meets your needs and that you experienced reliable service. We appreciate your support.
Works perfectly. Charged from initial 57% to 100% in 20 minutes. It powered our TV and router for 24 hours with 30% battery left. Solar charged to 100% with no problems.
Thank you for your positive feedback! We're glad to hear the power station met your expectations and performed well during your use. If you need any assistance in the future, feel free to reach out.
Thank you for your positive feedback! We're glad the Pecron F3000LFP is meeting your expectations. If you have any questions or need assistance, feel free to reach out.
Thank you for your review! We understand it is an investment, and we are glad to know it brought you peace of mind. We truly appreciate you and your business!
Honest trustworthy site. I would buy from them again.
Thank you for the kind words! We truly appreciate your trust and are grateful for the opportunity to serve you. We would be happy to help again anytime!
