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

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

Massive capacity, one connection

Running out of power mid-outage defeats the purpose of having a backup. The BLUETTI B500K is a high-capacity expansion battery that adds a full 5,120Wh to your AC200L or AC300 power station enough to turn an overnight backup into a multi-day one. Plug it in, and your system’s total storage jumps dramatically without replacing a thing.

For Jamaica, where outages stretch and the grid isn’t always there when you need it, that extra capacity is the difference between riding it out comfortably and watching the battery drain to zero.

5,120Wh of additional storage

Each B500K packs 5,120Wh one of the largest single expansion batteries in the BLUETTI lineup. Connected to an AC200L or AC300, it extends runtime for everything the station powers: fridges, freezers, fans, lights, routers, TVs, laptops, and small appliances. Where your base unit might cover a night, adding the B500K stretches that to days.

Practical runtime depends on what you’re running and how much of it, but the maths is simple: more stored energy means more hours before you need to recharge.

Built specifically for the AC200L and AC300

The B500K is designed for two models: the BLUETTI AC200L and the AC300. It connects directly and the added capacity is recognised instantly no complex wiring, no configuration, no adapters. Plug the cable in and your total system storage grows on the spot.

This is not a universal expansion battery. It’s purpose-built for these two stations, which means the connection, power management, and charging integration are matched and optimised rather than generic.

LiFePO₄ cells built for the long haul

Inside are advanced LiFePO₄ battery cells rated for 3,500+ charge cycles the safe, thermally stable chemistry that handles Jamaica’s heat and heavy daily cycling without degrading quickly. Built-in protection covers overvoltage, overload, and overheating, so the battery manages itself safely even under sustained demand.

That cycle count translates to roughly a decade of daily use before noticeable capacity loss serious longevity for a battery that’s going to work hard.

Solar-ready when connected

Paired with the AC200L or AC300, the B500K supports solar charging your panels feed the system and the expansion battery fills alongside the main unit. For off-grid setups, solar-powered homes, and anyone wanting to recharge from the Jamaican sun rather than the grid, this keeps the whole system topped up without a wall socket.

Where the B500K earns its place

• Home backup during extended outages — keep the fridge, fans, lights, and router running for days, not hours
• Off-grid cabins and rural properties — serious stored energy with solar recharging
• RV and van setups — extended trips without worrying about power
• Remote work sites — tools and equipment far from the grid
• Solar energy storage — capture more of the day’s sun and use it after dark

Specifications

FAQs

How much runtime does the B500K add?

It adds 5,120Wh of storage to your system enough to run essentials like a fridge, lights, fans, and a router for multiple days depending on load. The exact hours depend on what you’re powering and how much at once.

Which power stations does the B500K work with?

The AC200L and AC300 only. It’s specifically designed for these two models and connects directly without adapters or extra setup.

Can I use the B500K on its own without a power station?

It’s primarily an expansion battery and needs a compatible power station for full functionality. Limited output may be available through the main unit’s ports when connected, but standalone use isn’t its intended purpose.

Does the B500K charge from solar?

Yes when connected to an AC200L or AC300 with solar panels attached, the B500K charges from solar alongside the main unit. This makes it ideal for solar-powered setups and off-grid use.

How safe is the B500K for daily use?

Very safe. LiFePO₄ cells are the most thermally stable lithium chemistry, and the B500K includes built-in overvoltage, overload, and overheating protection. It’s rated for 3,500+ cycles, handling heavy daily use for years.

Is the B500K good for off-grid living in Jamaica?

It’s a strong fit. The high capacity, solar compatibility, and long cycle life suit Jamaica’s conditions frequent outages, abundant sun, and the need for dependable stored energy over extended periods.

Can I add more than one B500K to my system?

Check the AC200L or AC300’s expansion limits the number of batteries each station supports varies. Confirm with the product specs or get in touch before ordering multiple units.

Downloads

📄 BLUETTI B500 Expansion Battery User Manual (US, PDF)

Extend your power, not your worries

The B500K turns your AC200L or AC300 from a good backup into a serious one 5,120Wh of extra capacity that keeps the house running through the longest outages and stores a full day’s solar for use after dark. Add it to your cart, and if you’d like help confirming compatibility or sizing a system, get in touch we’ll make sure it all fits.