Power Expansion, Smarter & Stronger The Bluetti B300K2 gives you dependable backup power when you need it most—whether you're upgrading your home energy storage or planning for total off-grid independence. With flexible compatibility and rugged build quality, it’s a future-proof solution for growing power demands. Key Features & Benefits: 2,764.8Wh LiFePO4 Battery: Reliable energy storage with over 4,000 life cycles to 80%—built to last. Modular Power Expansion: Works with AC200L, AC200MAX, Apex300, AC300*, and AC500* systems. Cable Compatibility Notes: Works with Apex300 using CA90 cable (included). To connect with AC300, use P090A Cable (SKU: A-CBC-D6D24-UN-L80-0396) – sold separately. To connect with AC500, use P090D to P150D Cable (SKU: A-PTC-NO-UN-P090D-P150D) – sold separately. Expandable Capacity: Chain multiple B300K2 units or mix with B230, B300, B300S models for up to 33,168Wh with AC500. USB-A Output Port: Use as a standalone power source to keep essentials like phones and fans running during any situation. Automotive-Grade Build: Square LiFePO₄ cells, advanced AI-BMS, aluminum housing, and cooling fan ensure performance and protection. Fast Charging: Recharge to 80% in just 45 minutes when paired with AC300/AC500 (with required cables). DIY-Friendly Setup: Modular design with clear cable options makes expansion easy and affordable.