B500K Expansion Battery for AC200L/AC300

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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B500K Expansion Battery for AC200L/AC300

in Bluetti

$5,084.75 NZD (Including GST)

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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.

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

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 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.

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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