B500K Expansion Battery for AC200L/AC300

B500K Expansion Battery for AC200L / AC300 | 5,120Wh LiFePO₄

Your power station is already good. This is what makes it unstoppable.

The BLUETTI B500K bolts 5,120Wh of clean LiFePO₄ energy onto your AC200L or AC300 the difference between a unit that gets you through the evening and a system that gets you through the week. Blackout, off-grid weekend, or a full RV season: the B500K is still going long after everything else has flatlined.

5kWh Is a Number. Here’s What It Actually Buys You.

Extra capacity only matters if it turns into real runtime and this does. Enough to hold your fridge and freezer cold through an all-night outage. Enough to run fans, lights, routers, laptops and the TV deep into the small hours. Enough to keep the tools swinging on a job site with no mains in sight, and to carry a whole-home backup well past the point a standalone unit throws in the towel.

For scale: BLUETTI’s own figures put a single 100W bulb at roughly 43.8 hours on one B500K — near enough two full days from one battery (source).

One Cable. Instant Upgrade.

No wiring diagrams, no guesswork, no sparky on call. Purpose-built for the AC200L and AC300, the B500K connects via the included P090A cable and multiplies your storage the moment it’s plugged in.

And it doesn’t stop at one. The system scales all the way to 100kWh partial-home backup, whole-home backup, or a small business that simply can’t afford to go dark (BLUETTI).

Built to Outlast the Decade

• 4,000+ charge cycles and a working life of up to 10 years
• Stable thermal management with a third-generation wireless internal frame
• Efficient cooling fan that keeps temperatures honest under sustained load
• Overvoltage and overload protection watching every watt

Charge it hard, run it long, do it again tomorrow. LiFePO₄ chemistry is built for exactly this kind of abuse (BLUETTI).

Let the Sun Fill It

Paired with your AC200L or AC300, the B500K unlocks high-efficiency solar charging a natural fit for off-grid cabins, van and RV builds, solar home backup, and outdoor events or mobile work. Anywhere you’d rather generate power than pay for it.

It Works Beyond the Box

The B500K isn’t chained to one setup. Charge it through the SolarX 4K or Charger 2, and run your DC gear straight off it via the Hub D1 no main station required. One battery, several ways to power your world.

Tough on Site. Tidy at Home.

Rugged enough for the trades, clean enough for the living room. Wall-mount or rack-mount it to reclaim floor space, or lock it onto a Foldable Trolley when the power needs to travel with you.

At home in: whole-home backup · RV and van life · long camping trips · remote and field work · full solar systems

5,120Wh. One cable. Zero excuses.