Bluetti B300K Expansion Battery

Bluetti b300k expansion battery – 2.76 kWh lifepo₄ module for home & mobile power systems

Upgrade your power system with the bluetti b300k expansion battery, a high-capacity, long-life energy module engineered for both residential backup and off-grid applications. Featuring an impressive 2,764.8 Wh capacity and built with automotive-grade LiFePO₄ cells, the B300K is designed to integrate seamlessly with compatible BLUETTI power stations—including the AC200L, AC200MAX, AC300, and AC500—to dramatically expand your available energy storage.

Built for both flexibility and reliability, the B300K delivers over 4,000 charge cycles, making it an ideal long-term solution for energy independence. Whether you're powering a cabin, supplementing your RV, or securing a robust home energy backup, the B300K adapts effortlessly to your evolving power needs. Its standalone USB-A port also provides direct charging for small devices on the go.

Key Features:

• 2.76 kWh LiFePO₄ Battery Capacity: Store substantial energy for backup or off-grid use, with 4,000+ charge cycles ensuring dependable, long-term performance.
• Automotive-Grade LiFePO₄ Cells: Enhanced safety, thermal stability, and longevity backed by industry-grade lithium iron phosphate chemistry.
• Modular System Expansion: Pairs with compatible BLUETTI models—AC200L, AC200MAX, AC300, AC500—to create scalable energy solutions up to 33.17 kWh.
• Standalone Power Access: Includes a 12 W USB-A output for direct charging of smartphones, tablets, and other essentials when used independently.
• Ready for Any Application: Ideal for home energy storage, off-grid living, RVs, workshops, or emergency preparedness scenarios.

Ideal For:

• Home Backup Systems
  
• Cabin & Off-Grid Living
  
• Mobile & RV Power Expansion
  
• Emergency Preparedness
  
• Solar Energy Storage Integration
  

What’s Included:

• 1 × Bluetti b300k expansion battery (2,764.8 Wh)
  
• 1 × battery expansion cable (P090A)
  
• 1 × user manual
  

Specifications

Why Buy From Us

Why Buy From Ecogrid Supply?

• Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.

• Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.

• 30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.

• Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just real people who know off-grid power systems.

• Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.

• USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.

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• Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.

Buying Guide