BLUETTI B500K Expansion Battery | 5,120Wh

5.12 kWh, Lasts Up to 10 Years: Supplies reliable energy for years with over 4,000 cycles.
Scalable to 100 kWh: Easily expands your setup for partial, whole-home, or even small business backup.
Universal BLUETTI Compatibility: Works seamlessly with Apex 300, AC300, AC500, AC200L, AC200MAX, and upcoming models.
Part of a Smarter Power System: Pairs with SolarX 4K, Hub D1, and more for clean, connected energy.
More Durable & Safe: Wireless internal frame makes it resilient to real-world knocks and shocks.
Wall or Trolley Setup: Mount to save space or move with ease for flexible, convenient use.

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.

*Note: Achieved with 3*Apex 300 +18*B500K units

Why Choose BLUETTI B500K?

Extend Your Backup Time

From outage protection to camping trip 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.

A P090D to P150D cable is required for connecting with AC500 and sold separately.

The B500K works with old, existing, or future BLUETTI power stations and expansion batteries.

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.

Specifications

BATTERY INFO

Model

B500K
Battery Capacity

5,120Wh
Battery Type

LiFePO₄ (Lithium Iron Phosphate)
Cycle Life

4,000+ cycle 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

IN THE BOX

B500K Battery Pack
x 1
CA90* Battery Expansion Cable
x 1
Documents
x 1

Warranty Policy

Warranty Period

Build The Power warrants that the product will be free from defect in workmanship and material to the original consumer purchaser.

The warranty period starts on the date of purchase by the original consumer purchaser,

For the product of portable power station, the warranty period varies from 24 months to 72 months.
For the product of home backup system, the warranty period varies from 48 months to 60 months.
For the product of solar panel and accessories as cable, charger etc, 12 months is provided for the warranty service.

No warranty for gifts product and Warranty period may vary by country subject to local laws and regulations.

Warranty Statement

Any defects in material, workmanship of your product will be covered after you provide any valid proof of purchase and information including but not limited to:

A purchased order number made through Build The Power official stores.
Sales invoice or order confirmation email that clearly shows the description of the product, its price, and sales channel.

Note: The limited warranty is restricted to the country of purchase. The warranty will be invalid on the items once they are taken or shipped to other countries.

Exclusions of Warranty

Misused, abused, damaged by accident or damaged due to force majeure (e.g. lightning strikes, tornadoes, hurricanes, etc.);
Unauthorized modification, repair, dis-assembly or operation not in accordance with the official instructions or manuals;
Purchased from unauthorized resellers;
Use for special application other than normal consumer use;
Lost, stolen or full refunded product;
Any defect or damage caused by exposure to excessive heat, cold, liquids or other external causes;
Invalid proof of purchase;
Warranty period expired
The battery model on the warranty certificate does not match the actual item;
Unauthorized alteration on the warranty certificate;
Product wear and tear through the usage of time.

Return and Refund

Order Cancellation:

Order Cancellation can be requested by customer within 48 hours after placing an order by email or phone with the Build The Power official store.

If the product has been shipped, an intercept fee will be charged.

30 days money-back guarantee will be automatically credited to your order.

Claim Process

Please contact us via Email: sales@buildthepower.com, Monday through Sunday, for any assistance with the product.
For any warranty claims, service performed by Build The Power or local authorized service partner, subject to the options below:

Repaired by Build The Power service center, or
Swap for a replacement product with equivalent specifications according to model and service life

In case of replacement, a refurbished model of equal value may be provided and the delivery of the replacement will be arranged within 7 business days (subject to changes caused by force majeure) after confirming the defective item has been received at Build The Power warehouse.
A swap product assumes the remaining warranty of the original product or thirty (30) days from the date of replacement, whichever is greater.
For any out of warranty claims, please priorly contact BLUETTI Service for more details.

Warranty Extension

The warranty extension is now only applicable for the model of AC200MAX, AC200P or B230 purchased from Build The Power official website with protection against damage without service fee.
Any purchases of the four models from other platforms are required to submit the application for extended warranty.

Disclaimer of Implied Warranties

This limited warranty is in lieu of all other expressed or implied warranties, including any warranty of fitness for a particular purpose or use and any implied warranty of merchantability otherwise applicable to Build The Power portable solar generators. Build The Power and its affiliated companies shall not be liable for any special, incidental or consequential damages, including lost profits. There are no warranties extended other than as provided herein.

This limited warranty may be modified only by Build The Power. Any implied warranties allowed by law shall be limited in duration to the terms of the express warranty provided herein. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

This warranty gives you specific legal rights. You also have other rights from state to state. Build The Power’s only liability shall be the repair or replacement as stated above.

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BLUETTI B500K Expansion Battery | 5,120Wh