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B500K Expansion Battery connected to BLUETTI power station
BLUETTI B500K 5120 Wh LiFePOâ‚„ high-capacity expansion battery pack for scalable home, RV, off-grid solar and backup power systems
BLUETTI B500K 5120 Wh LiFePOâ‚„ high-capacity expansion battery pack for scalable home, RV, off-grid solar and backup power systems
BLUETTI B500K 5120 Wh LiFePOâ‚„ high-capacity expansion battery pack for home, RV, off-grid solar, and backup power systems
BLUETTI B500K 5120 Wh LiFePOâ‚„ high-capacity expansion battery pack for home backup, RV, off-grid solar, and portable power systems
BLUETTI B500K2 modular LiFePOâ‚„ expansion battery pack for high-capacity home, RV, off-grid solar, and backup power systems
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B500K Expansion Battery for AC200L/AC300

in BLUETTI Expansion Batteries

Price range: US$3,000.00 through US$3,049.00

Available in stock

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Description

B500K Expansion Battery for AC200L / AC300 | High-Capacity Power Boost

The BLUETTI B500K is a high capacity expansion battery designed specifically to extend the runtime and performance of the AC200L and AC300 power stations. Whether you’re building a stronger home backup system or powering long outdoor adventures, the B500K delivers reliable, long lasting energy with advanced safety and durability.

🔋B500K Expansion Battery Huge Energy Storage for Long Runtime

With its powerful internal capacity (5000-series range), the B500K gives your AC200L or AC300 dramatically more runtime for:

Refrigerators & freezers

Fans, lights, routers

Laptops, TVs & electronics

Power tools & small appliances

Emergency home backup

Perfect for long outages, off-grid stays, and RV living.

âš¡ Seamless Compatibility

Built specifically for AC200L and AC300, it connects smoothly and increases your total storage instantly no complex setup required.

🧪 Advanced LiFePO₄ Battery Cells

Enjoy safety and long life with:

3,500+ charge cycles

Stable temperature control

Overvoltage & overload protection

High durability under heavy use

🌞 Solar-Friendly Expansion

Supports solar charging when connected to AC200L or AC300, making it ideal for:

Off-grid cabins

RV/van setups

Solar-powered home backup

Outdoor events or mobile work

🔌 Independent Output Options

Depending on configuration, the B500K may allow powering smaller devices even without attaching it directly to the main unit (USB/DC via power station ports).

💼 Strong, Reliable & Easy to Handle

Designed with portability and durability in mind, suitable for:

Home backup systems

RV and van life

Long camping trips

Remote job sites

Solar energy setups

FAQs

What is the purpose of the BLUETTI B500K Expansion Battery and who is it best for?

The BLUETTI B500K is designed to expand the battery capacity of compatible power stations like the AC200L and AC300. It’s ideal for users who need longer runtime for home backup, RV living, or off-grid setups. This makes it a great choice for both emergency use and outdoor adventures.

How much additional runtime does the BLUETTI B500K provide?

The B500K significantly increases your total energy storage, allowing devices like refrigerators, TVs, and laptops to run for much longer. The exact runtime depends on your connected load and usage. It’s especially useful during long power outages or extended off-grid stays.

Is the BLUETTI B500K compatible with all BLUETTI power stations?

No, the B500K is specifically designed for the AC200L and AC300 models. It integrates seamlessly with these units to expand capacity without complicated setup. Always check compatibility before purchasing to avoid connection issues.

Can the BLUETTI B500K be used without a power station?

The B500K is primarily an expansion battery and works best when connected to a compatible power station. However, depending on configuration, you may access limited output via the main unit’s ports. For full functionality, pairing with AC200L or AC300 is required.

Does the BLUETTI B500K support solar charging?

Yes, when connected to a compatible power station, the B500K supports solar charging. This makes it perfect for solar-powered homes, RV setups, and off-grid living. It allows you to generate and store clean energy efficiently.

How safe and durable is the BLUETTI B500K battery?

The B500K uses LiFePO4 battery cells, offering over 3,500 charge cycles and strong thermal stability. It includes built-in protection against overvoltage, overload, and overheating. This ensures long-term reliability and safe operation even under heavy use.

What devices can the BLUETTI B500K power?

When paired with a compatible power station, the B500K can power appliances like refrigerators, fans, lights, laptops, TVs, and even small power tools. It’s versatile enough for both home backup and outdoor applications. The actual capacity depends on the total system setup.

Is the BLUETTI B500K suitable for off-grid living and RV use?

Yes, the B500K is an excellent option for RV life, van setups, and off-grid cabins. Its high capacity and solar compatibility make it reliable for extended use without grid power. It’s designed to handle demanding outdoor energy needs.

Additional information
Your Power Station

B500K for Apex 300, B500K for AC200L/AC300, B500K for AC500
Product Overview

Product Overview

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

Apex 300 + B500K
AC300 + B500K
AC500 + B500K
AC200L + B500K

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 LiFePOâ‚„ 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

Tech Specs

Tech Specs

B500K for Apex 300

FAQs

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.

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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