BLUETTI B500K Expansion Battery 5,120Wh — True Gear
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BLUETTI B500K Expansion Battery 5,120Wh

  • Warranty Information 5 Year Manufacture Warranty
Save $2,100.00
Original Price $4,999.00
Current Price $2,899.00 + FREE SHIPPING
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5 Year Warranty
Pickup Available
Free P090A Cable Included
Perfect for most Bluetti Units Turn your setup into a serious off grid / backup setup
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General ETA ~ Jul 19–Jul 23
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Delivery

Your order leaves our warehouse in 1-3 business days.

Estimated arrival: Jul 19 – Jul 23

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Pick up direct from:

  • Villawood NSW, 2163
  • Strathfield South NSW 2136
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Take Control With the BLUETTI B500K

When you’re off-grid and the power dips, nothing kills the mood quicker than gear that can’t keep up.

It’s frustrating, especially when you’ve spent good money on a setup that’s meant to make life easier, not harder.

The BLUETTI B500K gives your power station the extra grunt it needs, keeping everything running without the stress.

Stick around — this one’s solid kit for anyone who hates running short on juice.

Key Features - BLUETTI B500K

  • 5,120Wh LiFePO₄ battery module
  • 4,000+ cycle longevity
  • Works with AC200L/AC200MAX/AC300/AC500
  • 65A max charge input
  • 70A max discharge output
  • Two expansion ports, 58.4V DC

Why you'll love the BLUETTI B500K

Serious long-term reliability

The LiFePO₄ chemistry and 4,000+ life cycles mean the B500K is built for the long haul. You’re buying something that’ll stand up to years of regular use, not a battery that fades after a handful of trips.

Massive usable capacity

With 5,120Wh onboard, you’ve got the headroom to run fridges, lights, comms gear, tools and more without juggling loads. It brings breathing room to your camp setup or backup system, so you’re not constantly checking percentages.

Seamless system expansion

It pairs cleanly with popular BLUETTI units — AC200L, AC200MAX, AC300, AC500, Apex 300 and the B300K. No messing around, no tricky installs. Just plug in and boost your existing system.

Dark grey portable generators compatible with each other lying on the ground.

Dependable in tough conditions

Operating from –20°C to 40°C, it’s ready for Aussie heat, cold mornings and everything in between. Whether it’s living in the back of the 4WD or set up at home, it keeps delivering.

Straightforward, hassle-free power

With simple ports, strong current capability and a solid 45kg chassis, it’s built for people who want dependable gear without the dramas. Set it up once and get on with your day.

Got Questions? Chat to an expert:

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BLUETTI B500K Specifications

BATTERY INFO

  • Capacity - 5,120Wh
  • Type - LiFePO₄ (Lithium Iron Phosphate)
  • Life Cycles - 4,000+ cycle to 80% original capacity

GENERAL

  • Compatibility - AC200L, AC200MAX, AC300, AC500, Apex300, B300K
  • Weight - 45 kg / 99.21 lbs
  • Dimensions (L x W x D) - 520 × 327 × 308.5 mm / 20.47 × 12.87 × 12.15 in
  • 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 - 65A Max.
  • Discharging Current - 70A Max.
  • 2 × Expansion Port - 58.4VDC Max., 90A Max.
  • Warranty - 4 Years

What's Included

Everything you need is included with your product.

  • B500K Expansion Battery
  • Battery Expansion Cable (P090A Long Cable)
  • User Manual

BLUETTI B500K Downloads

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BLUETTI B500K FAQs

What BLUETTI units is the B500K compatible with?

The B500K pairs with the AC200L, AC200MAX, AC300, AC500, Apex 300, and B300K. If you're running an AC500 off-grid setup, this is the expansion battery built for it. Just connect via the included P090A expansion cable and you're away.

How much power does the BLUETTI B500K actually store?

It holds 5,120Wh - that's a serious amount of energy. Depending on your setup, that could run a full-size fridge for several days, keep your power tools charged on a remote job site, or run a caravan for a weekend without touching the solar. Pair it with a compatible BLUETTI unit and you've got a proper off-grid power bank.

How long does the BLUETTI B500K battery last?

The B500K uses LiFePO4 (lithium iron phosphate) chemistry, which is rated for 4,000+ charge cycles to 80% of original capacity. Cycle it daily and you're looking at well over a decade of use. It's the same chemistry used in quality EV batteries - built to last, not to be replaced every few years.

How heavy is the BLUETTI B500K?

It weighs 45kg and measures 520 x 327 x 308.5mm. It's not something you'll be chucking in the ute tray for a weekend trip - this is a fixed or semi-fixed installation unit, ideal for a shed, workshop, caravan setup, or off-grid cabin. Plan for a permanent spot and you won't have any issues.

How does the BLUETTI B500K charge?

The B500K charges through your compatible BLUETTI AC unit - it doesn't charge independently. Your AC unit handles the input (solar, AC mains, generator, etc.) and pushes charge into the B500K via the expansion port. Max charging current is 65A, so with a well-specced solar array through an AC500, you can top this thing up pretty quickly.

What warranty does the BLUETTI B500K come with?

It comes with a 5-year manufacturer warranty through Bluetti Australia. We're an authorised Australian dealer, so if anything goes wrong you're dealing with local support - not chasing an overseas supplier. We ship Australia-wide with full tracking.

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