BLUETTI B500K Expansion Battery 5,120Wh
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The Owner's Insights on the BLUETTI B500K
The B500K is what you add when your power station is right but your run time isn't. It's 5,120Wh of LiFePO4 in a box that does nothing on its own: no sockets, no screen, no inverter. It plugs into your station and doubles or triples what you can store.
Get the pairing right before you order. It fits the Apex 300, AC200L, AC200MAX, AC300 and AC500, and it daisy-chains off a B300K. If your station isn't on that list, this isn't your battery, and a phone call will save you a return.
Pick your variant carefully too. The Apex 300 version ships with the cable that suits the Apex, and the other version ships with the P090A cable for the AC-series units. Same battery, different lead. And at 45kg it goes where you put it and stays there, so decide on its home before it arrives.
Why You'll Love the BLUETTI B500K
- 5,120Wh of extra storage. Enough on its own to hold your 60L camp fridge for about four days.
- 4,000+ cycles to 80%. Charge it flat and full every week and you're still well inside the decade.
- Two expansion ports. Chain another battery off it, up to 58.4V and 90A, as your setup grows.
- 65A charge, 70A discharge. It takes and gives power fast enough to keep up with a big station.
- No electronics to fail. It's cells and a management board, so there's no inverter or screen to go wrong.
- Cable in the box. The right expansion lead for your chosen variant ships with the battery.
Why You Should Consider a BLUETTI Expansion Battery
BLUETTI is one of the biggest names in portable power worldwide, and the B500K is the battery that keeps their bigger stations useful for years rather than seasons. It carries a 4-year warranty with stock and support here in Australia, so a claim is a phone call rather than an overseas ticket queue. See the rest of the BLUETTI range.
BLUETTI B500K Specifications
| Capacity | 5,120Wh |
| Battery chemistry | LiFePO4 |
| Cycle life | 4,000+ cycles to 80% |
| Compatibility | Apex 300, AC200L, AC200MAX, AC300, AC500, B300K |
| Charging current | 65A max |
| Discharging current | 70A max |
| Expansion ports | 2 x 58.4V DC max, 90A max |
| Charge temperature | 0 to 40°C |
| Discharge temperature | -20 to 40°C |
| Working humidity | 5% to 95% RH |
| Weight | 45kg |
| Dimensions | 520 x 327 x 308.5mm |
| Warranty | 4 years |
| Model | B500K |
Which power stations does the BLUETTI B500K fit?
BLUETTI lists the B500K as compatible with the Apex 300, AC200L, AC200MAX, AC300 and AC500, and it also chains off a B300K. We stock the Apex 300, which is the pairing most of our customers buy. If your station came from somewhere else or it's an older model, check the list above before you order, and call us if you're not certain. A battery that doesn't fit your unit is an expensive paperweight.
Which B500K variant do you need?
The battery is identical either way. What changes is the expansion lead in the box: the Apex 300 variant ships with the cable for the Apex, and the other variant ships with the P090A long cable for the AC-series stations. Pick the one that matches your station on this page and the right lead comes with it. If you already own spare BLUETTI expansion leads, either variant will do.
How much longer will the B500K run your gear?
5,120Wh on its own holds a 60L camp fridge drawing about 45W for roughly four days. Add it to an Apex 300 and you're carrying close to 7,900Wh all up, which covers the fridge, the freezer, your modem and a few lights through a long outage rather than an overnight one. Fitting it to a station is a plug-and-go job with the supplied lead, and your station manages the charging from there.
BLUETTI B500K price in Australia
The price on this page includes delivery to your door anywhere in Australia. Expansion batteries carry the same 100 Day Free Returns as our power stations, so if you get the pairing wrong, send it back.
What's Included
- BLUETTI B500K Expansion Battery
- Battery expansion cable for your chosen variant
- User manual
What's Not Included
- A power station (this is a battery only, with no sockets or inverter)
- Solar panels or a solar cable
- Trolley for moving it about
The in-the-box list above is the manufacturer's own packing list. The B500K has no outputs of its own, so it needs a compatible station such as the Apex 300 to be any use, and folding panels if you want to refill it off-grid.
Not Sure Which Expansion Battery Suits You?
The B500K suits you if you already own a compatible BLUETTI station and you keep running out before the trip or the outage ends. It's the wrong pick if you don't own one of the listed stations, or if you need something you can shift on your own, because 45kg stays where you put it. Every power station from True Gear comes with 100 Day Free Returns, and the B500K carries a 4-year BLUETTI warranty. Not sure your station takes it? Call the store on 03 7056 6732 and you'll get a straight answer before you spend the money.