BLUETTI B300K expansion battery for AC500

BLUETTI B300K Expansion Battery for AC500 | 2,764.8Wh High-Capacity Power Module

More power. More freedom. More of everything your AC500 was built to do.

Meet the BLUETTI B300K — the expansion battery that takes your AC500 from “impressive” to “unstoppable.” Packing a massive 2,764.8Wh LiFePO₄ battery, this scalable power module is engineered to extend your runtime, multiply your capacity, and keep the lights on long after the grid taps out. Whether you’re backing up your entire home, powering an off-grid cabin, or living the van life, the B300K is the muscle behind the mission.

Scale It Your Way — 5kWh, 10kWh, 15kWh & Beyond

One B300K is powerful. Several? That’s a whole-home energy system. Stack multiple modules onto your AC500 and build a setup that runs:

• Refrigerators & freezers
• AC units & heaters (with AC500)
• Lights, routers & home electronics
• Power tools & workshop gear
• Essential medical devices
• Full off-grid living, day after day

From sudden blackouts to permanent off-grid setups, the B300K adapts to your energy appetite.

Built for the AC500 — Down to the Last Watt

This isn’t a generic add-on. The B300K is purpose-engineered to integrate seamlessly with the AC500, delivering stable, efficient power, longer runtime, and full compatibility with the AC500’s advanced features. Plug in, power up, and expand without limits.

LiFePO₄ Cells That Go the Distance

With 3,500+ life cycles, superior heat resistance, and rock-solid safety, the B300K is built to last for years of daily use. That’s reliability you can count on long after cheaper batteries call it quits.

Solar-Ready & Self-Sufficient

Pair it with the AC500 and unlock high-efficiency solar charging perfect for cabins, RVs, renewable home setups, and slashing your electricity bills. Store more clean energy by day, stay powered all night, and let the sun do the heavy lifting.

Need power on the go? The B300K’s built-in output ports (varies by model) let you charge small devices even without the AC500 connected.

Smart Protection, Built In

An advanced Battery Management System (BMS) stands guard 24/7 with:

• Overcharge & over-discharge protection
• Real-time temperature monitoring
• Overcurrent & short-circuit protection

Wherever you roam, your power stays safe.

Strong. Stackable. Effortless.

Designed to stack, install, and expand with zero hassle, the B300K grows right alongside your needs.

Perfect for: Whole-home backup · RV & van life · Workshops & field ops · Long camping trips · Solar-powered living