BLUETTI B500K 5120 Wh LiFePO₄ high-capacity expansion battery pack for scalable home, RV, off-grid solar and backup power systems

BLUETTI B500K 5120 Wh LiFePO₄ high-capacity expansion battery pack for home, RV, off-grid solar, and backup power systems

BLUETTI B500K 5120 Wh LiFePO₄ high-capacity expansion battery pack for home backup, RV, off-grid solar, and portable power systems

BLUETTI B500K2 modular LiFePO₄ expansion battery pack for high-capacity home, RV, off-grid solar, and backup power systems

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BLUETTI B500K Expansion Battery | 5,120Wh

in Bluetti

$4,915.26 NZD (Including GST)

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BLUETTI B500K Expansion Battery | 5,120Wh

$4,915.26 NZD (Including GST)

Add to Package ($4,915.26 NZD (Including GST))

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Total: $4,915.26

Description

BLUETTI B500K Expansion Battery 5,120Wh

The BLUETTI B500K Expansion Battery is a high capacity energy storage solution designed to extend compatible BLUETTI power stations such as the AC200L and AC300. With a massive 5,120Wh capacity, it provides extended runtime, stronger backup support, and reliable off grid power for demanding energy needs.

This battery is built for users who require long duration power for home backup, RV living, solar systems, and mobile work environments.

5,120WH High Capacity Energy Storage

With 5kWh+ of stored energy, the B500K delivers long-lasting backup for:

Perfect for whole-night power, multi-day camping, or off-grid living.

Seamless Expansion for AC200L & AC300

The B500K connects effortlessly to compatible BLUETTI power stations, instantly multiplying your total energy storage. Create the system you need:

Home backup solution
RV/van power setup
Solar off-grid system
Multi-battery power bank

Scale up your energy as your lifestyle grows.

Long-Life LiFePO₄ Battery

Built with advanced LiFePO₄ cells for:

3,500+ charge cycles
Higher safety
Superior thermal stability
Long service lifespan

A battery designed for years of dependable use.

Solar-Ready Energy Storage

Supports high-efficiency solar charging when paired with your AC200L/AC300—making it ideal for:

Remote locations
Off-grid cabins
Sustainable power setups
Reducing utility dependence

Store more solar energy and stay powered anytime.

Smart, Safe, and User-Friendly

Equipped with advanced BMS protections:

Overvoltage protection
Temperature monitoring
Short-circuit protection
Overcharge/over-discharge control

Your system stays safe, stable, and efficient.

Rugged & Easy to Integrate

Despite its large capacity, the B500K is built for easy handling and seamless stacking with compatible BLUETTI units. Ideal for:

Home emergency backup
RV & van life
Long camping trips
Fieldwork & mobile projects
Solar storage systems

Product Overview

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.

Home Backup

Camping

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.

Portable Power Station

Ecosystem

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.

*Note: Sold separately.

Tech Specs

B500K for Apex 300

FAQs

Q1: How to claim warranty?

Once you receive your product, please register to claim your warranty on our website.

Q2: 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.

Q3: 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.

Q4: Does the B500K support power bank mode?

No.

Q5: 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.

Q6: 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.

Q7: How many B500K batteries can l connect with AC500? Can l mix B500K/B300K/B300/B300S ?

Up to 6 B500K batteries via the P150D to P090A cable. Yes, you can mix use six packs at most.

Q8: How many B500K batteries can l connect with AC200L? Can l mix B500K/B300/B230/B210?

Up to 2 B500K batteries via the P090A cable, for 12,288 Wh capacity. You can only mix with B300, B300K, and B500K.

Q9: How many B500K batteries can l connect with AC200MAX? Can l mix B500K with other BLUETTI expansion batteries?

Up to 2 B500K batteries via the P090A cable.

Yes, you can mix with B300K, B300, B230, and B210, up to 2 packs in total.

Q10: How can I monitor each battery when they’re mix used?

You can connect them to your power stations and check them using the BLUETTI app.

Q11: Can I use B500K alone as a UPS?

No.

Q12: Can I use or charge B500K in sub-zero temperatures?

Technically, it can power devices below zero, but it can’t be recharged.

Temperature ranges for B500K :

Charge: 0 to 40℃ (32 to 104℉);

Discharge: -20 to 40℃ (-4 to 104℉);

Storage: -20 to 40℃ (-4 to 104℉).

Q13: How long can it run my device?

Runtime = Battery capacity × DoD × η ÷ (Device power +Self consumption) For B500K, both DoD (Depth of Discharge) and η (inverter efficiency) are 90%, and the self consumption is 3 W.

If you run a 100 W light bulb with it, the runtime will be: 5,120 Wh × 98% × 90% ÷ (100 W + 3 W) ≈ 43.8 hr

Note: For reference ONLY, actual results vary.

Q14: Is B500K waterproof?

No. Please do NOT place it in a humid environment for a long time.

Q15: Is it possible to replace the built-in battery?

No. If the battery pack is faulty or even dead, please contact BLUETTI Customer Service.

Q16: Any videos on connecting B500K with BLUETTI units (AC300, AC500, AC200MAX, AC200L, Apex 300, B300K)?

Please check out our BLUETTI Support YouTube channel for tutorials.

Q17: How long can it run my device?

Running time = Battery capacity × DoD × η ÷ Device rated power DoD refers to Depth of Discharge and η is local inverter efficiency. For B300K, both DoD and η are 90%. If you run a 100W light bulb with it, the running time will be:

2,764.8Wh × 90% × 90% ÷ 100W ≈ 22.39hrs

Note: The above data is for reference ONLY.

Q18: Can I use the B500K without a power station?

Yes, you can pair the B500K with BLUETTI ecosystem components to use it independently. For instance, you can charge it using the SolarX 4K or the Charger 2, and power your DC devices via the Hub D1.

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