Product Description

Massive backup capacity for your power system — the BLUETTI B500K2 Expansion Battery. This 5,120Wh LiFePO₄ battery block connects to your BLUETTI Apex 300 (and other compatible stations) to deliver serious runtime for partial, whole-home, or small-business backup. Stack multiple units to scale your system all the way up to 100kWh.

Built for the long haul with LiFePOâ‚„ cells rated for 4,000+ cycles and up to a decade of dependable service. For the Apex 300, it ships with the CA90 high-speed connector for fast, seamless expansion.

A rugged internal frame keeps it durable, and it’s wall-mountable or trolley-compatible for flexible placement at home or on the move. Backed by a 4-year warranty.

Key Features

  • 5,120Wh LiFePOâ‚„ capacity (~$0.31/Wh value)
  • 4,000+ cycles to 80% — lasts up to 10 years
  • Scalable to 100kWh across a stacked system
  • CA90 connector included for high-speed Apex 300 expansion
  • Wall-mountable or trolley-compatible for flexible placement

Compatibility

  • BLUETTI Apex 300, AC300, AC500, AC200L, AC200MAX (and upcoming models)

Specifications

Capacity 5,120Wh
Battery Chemistry LiFePO₄ — 4,000+ cycles to 80%
Connector CA90 Battery Expansion Cable (included)
Max Expansion Scalable to 100kWh
Mounting Wall-mountable / trolley-compatible
Dimensions 20.47 × 12.87 × 12.15 in (520 × 327 × 308.5 mm)
Weight 99.21 lbs (45 kg)
Warranty 4 Years

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