Bluetti B300K Expansion Battery | 2,764.8Wh

It weighs 29.5kg, so it's a solid unit - you'll want a mate to help lift it. It's not designed to be carried around like a portable battery; it's meant to sit alongside your AC200L, AC300, AC500, or APEX 300 power station and stay put while it does its job.

The B300K uses LiFePO4 (lithium iron phosphate) chemistry, rated for over 4,000 charge cycles to 80% of original capacity. That's well over a decade of regular use for most people - far longer than typical lithium-ion batteries.

With 2,764.8Wh of capacity, you can run a full-size fridge for 2-3 days, keep a CPAP machine going for weeks, power lights and fans around camp, charge phones and laptops dozens of times, or run power tools on a job site. Pair it with an AC500 and you've got enough to run most of a house during an outage.

The B300K doesn't charge on its own - it's an expansion battery that charges through the compatible power station it's connected to (AC200L, AC300, AC500, or APEX 300). When paired with an AC500, it can charge to 80% in around 45 minutes. You can charge via mains power, solar panels, or both at once depending on your setup.

It comes with a 4-year manufacturer's warranty through Bluetti Australia. We ship Australia-wide, and there's a 100-day free returns policy if something's not right. Bluetti's customer support team is available 7 days a week.

Absolutely. It's one of the better options for a serious off-grid or caravan power setup. Stack multiple B300K units together to reach up to 16,588Wh total capacity. It handles temperatures down to -20°C for discharging, so it'll cope with cold nights outback without issue.