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BLUETTI B300K Expansion Battery product image
Batteries & storage

B300K Expansion Battery

BLUETTI

BLUETTI B300K is a 2,764.8Wh automotive-grade LiFePO4 expansion battery designed for several current BLUETTI power-station platforms.

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Model details

Key information for this model.

Use the verified specifications below as a research starting point, then confirm the exact regional version on the manufacturer page before buying.

Capacity2,764.8Wh
Nominal battery51.2V / 54Ah
ChemistryLiFePO4
Life cycles6,000+
Standalone outputUSB-A 12W
Weight29.5 kg
Dimensions52.5 × 32.7 × 20.9 cm
Best for

Where it fits.

BLUETTI users who need a modular 2.76kWh expansion battery across supported AC and Apex platforms.

Watch for

Limits to check.

Some systems require an additional connection cable; confirm the exact host power station and cable before purchase.

Compatibility

System fit.

BLUETTI AC200L; AC200MAX; AC300; Apex 300; AC500 (P090D-to-P150D cable required)

Warranty

Coverage note.

3-year standard plus 1-year registration extension on the current U.S. listing.

Next checks

Useful next steps for this model.

Move from model research into comparison, load planning and local installation help without starting again.

01

Official product information

Confirm the current regional model, specifications, included accessories and availability with the manufacturer.

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02

Compare alternatives

Put this model beside nearby options and compare capacity, power, charging, compatibility and other relevant differences.

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03

Estimate the storage you need.

Use the most relevant Melnti calculator to connect the product specification to the load or system requirement.

Estimate battery runtime →
04

Local help

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Related BLUETTI equipment

More models in this equipment family.

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Source & buying note

Confirm the exact regional model before buying.

Manufacturer pages, regional SKUs and specifications can change. Use the source links below to confirm the exact model and local version before placing an order.

Information checked: 2026-09-01

Market note: United States product page

Official product: Open manufacturer page ↗