Bluetti B300K Expansion Battery (2 764.8 Wh) The B300K is a modular expansion battery that boosts the capacity of Bluetti power stations such as the AC200L, AC200MAX, AC300 and AC500. Its 2 764.8 Wh LiFePO₄ pack delivers over 4 000 life cycles, providing reliable backup during outages. When paired with the AC500, it allows systems to reach 16 588 Wh for off‑grid or home backup needs. Automotive‑grade LiFePO₄ cells offer enhanced safety, and the battery features a USB‑A port for standalone device charging. A 3+1‑year warranty underscores long‑term reliability. Key specifications Spec Value Model B300K Battery capacity 2 764.8 Wh (51.2 V, 54 Ah), expandable to 16 588 Wh with AC500 Battery type LiFePO₄ (Lithium Iron Phosphate) Life cycles 4 000+ cycles to 80 % original capacity Compatibility AC200L, AC200MAX, AC300, AC500 and future modules USB‑A output 12 W max (5 V / 2.4 A) Built‑in port USB‑A for charging small devices Net weight Approx. 29.5 kg (65.04 lbs) Dimensions (L × W × H) 525 × 327 × 209 mm (20.67 × 12.87 × 8.23 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 60 A max (may decrease outside specified temperatures) Discharging current 70 A max Expansion ports 2 × expansion port (58.4 V DC, 90 A max) Warranty 3 + 1 years In The Box: Maximise your Bluetti setup. Add the B300K expansion battery to your Energian basket and unlock bigger capacity with a robust 3+1‑year warranty.
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