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Power Expansion for Every Situation
The B300K adapts to your life, whether you're safeguarding your home during outages or powering an off-grid adventure. Stack multiple B300K batteries, or mix and match with other BLUETTI batteries for a customized energy solution that ensures you're never caught without power, no matter where you are.

AC200L+B300K AC200MAX+B300K

AC300+B300K

AC500+B300K

Great Compatibility for More Possibilities
The B300K seamlessly integrates with AC200L, AC200MAX, AC300, and AC500* power stations,
giving you the flexibility to scale your energy setup as your needs grow. Whether you're prepping for more power at home or gearing up for your next adventure, the B300K has you covered.P090D to P150D cable is required for connecting with AC500 and sold separately.

Built to Protect, Designed to Last
The B300K is designed to excel in safety and reliability. Featuring square LiFePO₄ batteries and cutting-edge AI-BMS technology, together with a robust aluminum casing, advanced wireless components, and efficient cooling fan ensure this battery stands the test of time, giving you a power source you can count on in any situation.

A Standalone Power Source, A Standout Performance
The B300K isn't just an add-on; it's also a versatile power hub. With a USB-A port, it's perfect for keeping your essentials like smartphones, tablets, or fans charged, whether you're ready to make an urgent call or message, eager to share beautiful moments with your friends, or try to stay cool while camping in a tent. Power is always within reach, wherever life takes you.

About this item

[Expandable Capacity] - Effortlessly integrates with BLUETTI AC200L, AC200MAX, AC300, and AC500 power stations.
[Best RV Power] - Besides the AC outlets, wireless charging pad, USB-A, USB-C, and car port, it also comes with a 30A RV port to cover your diverse charging needs in RV trip.
[Fast Recharging] - Get up to 80% charge in only 45 min, keeping you prepared for any situation. Ideal for home use, travel, and emergency readiness.
[24/7 UPS Home Backup] - Tie the AC300/AC500 & B300K power system to your home grid to power your home whenever a blackout occurs. Only a licensed electrician can install the UPS power system.
[3+1 Years Warranty] - Long-term reliability guaranteed to ensure your battery is well protected.

Specifications

PREVIEW

BATTERY INFO

Model:

B300K

Battery Capacity:

2,764.8Wh (51.2V, 54Ah)

Battery Type:

LiFePO4 (Lithium Iron Phosphate)

Life Cycles:

4,000+ Cycles to 80% Original Capacity

OUTPUT

USB-A:

12W Max., 5V / 2.4A

GENERAL

Net Weight:

Approx. 29.5kg (65.04lbs)

Dimensions (L × W × H):

525 × 327 × 209mm (20.67 × 12.87 × 8.23in)

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:

60A Max.
(Current may decrease outside specified temperatures)

Discharging Current:

70A Max.

2 × Expansion Port:

58.4VDC Max., 90A Max.

IN THE BOX

FAQS

Q1: Which BLUETTI power stations can work with B300K?
A: B300K is compatible with AC200L, AC200MAX, AC300, and AC500. The P090D to P150D cable is required for connecting with AC500 and sold separately.

Q2: Why doesn't the B300K drain all its power?
A: The B300K 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?
A: No, it's important to recharge the B300K in time before the SoC drops to 1% to avoid potential damage. Additionally, ensure it's placed in an environment of at least 10°C (50°F) for at least 12 hours before recharging.

Q4: Can I use the B300K alone?
A: Yes. B300K is a standalone power source with a 12W USB-A port. Note: The B300K can only be charged by connecting to the AC500/AC300/AC200L/AC200MAX

Q5: How many B300K batteries can l connect with AC300? Can l mix B300K/B300/B300S ?
The AC300 supports connecting with up to 4 B300 / B300K using the P090A cable.
Note: The AC300 can mix and match with B300 and B300K. However, it cannot connect B300, B300K, and B300S batteries simultaneously.

Q6: How many B300K batteries can l connect with AC500? Can l mix B300K/B300/B300S ?
The AC500 supports up to 6 B300K. The P150D to P090A cable is required for connecting the AC500 with B300K or B300K with B300S. The AC500 can mix and match with B300, B300S, and B300K, with up to 6 total battery packs.
Note: For the combo with one AC500 unit, if B300 is included, up to 4 battery packs can be connected; if not, up to 6 packs can be connected.

Q7: How many B300K batteries can l connect with AC200L? Can l mix B300K/B300/B230/B210 ?
A: The AC200L supports up to 2 B300K for up to 7,577.6Wh capacity using the P090D cable.
Note: AC200L can only mix with B300 and B300K.