BLUETTI B500K 5,120Wh Expansion Battery for Apex 300 Power Station

BLUETTI B500K 5.12kWh Expansion Battery | Apex 300 Compatible | Scalable to 100kWh | LiFePO₄ Backup Power

Expandable Power. Built for Apex 300 Systems.

The BLUETTI B500K is a 5.12kWh lithium iron phosphate (LiFePO₄) expansion battery engineered specifically to expand the capacity of the BLUETTI Apex 300 Power Station. Designed for long service life, system flexibility, and dependable performance, the B500K delivers scalable energy storage for home backup, RVs, off-grid living, and mobile power applications.

With 4,000+ charge cycles, expansion capability up to 100kWh, and seamless integration into the BLUETTI ecosystem, the B500K is a future-ready solution for growing energy needs.

Key Features:

• 5.12kWh Modular Energy Storage: Each B500K provides 5.12kWh of usable energy and can be expanded up to 100kWh when paired with the Apex 300—supporting partial-home, whole-home, or small business backup systems.
• Long-Life LiFePO₄ Battery Technology: Built with premium lithium iron phosphate cells rated for 10+ years of use, offering superior safety, thermal stability, and long cycle life.
• Apex 300 Compatibility: Designed to integrate seamlessly with the BLUETTI Apex 300, ensuring stable communication, efficient charging, and reliable system performance.
• Smarter BLUETTI Ecosystem Integration: Works with BLUETTI ecosystem components such as SolarX 4K, Hub D1, and other modular accessories to create a clean, connected energy system.
• Rugged, Shock-Resistant Construction: BLUETTI’s third-generation wireless internal frame improves durability against vibration and impacts while optimizing airflow for consistent thermal management.
• Flexible Installation Options: Mount the B500K to a wall or rack for a fixed installation, or pair it with the Foldable Trolley 2 (sold separately) for a mobile, high-capacity backup solution.

Applications:

• Home Backup Power with Apex 300
• RV & Van Life Energy Storage
• Camping & Mobile Power Solutions
• Off-Grid Living & Remote Work
• Small Business & Workshop Backup

Why Choose the BLUETTI B500K?

• Extended Runtime for Apex 300: Expand your Apex 300 system to deliver longer backup durations during outages or off-grid use—greater energy independence when it matters most.
• Adaptable & Future-Ready: The B500K scales with your needs, allowing you to start small and expand capacity as requirements grow.
• Safe, Reliable, Long-Lasting: Advanced LiFePO₄ chemistry, efficient cooling, and a reinforced internal design ensure dependable operation in real-world conditions.

What’s Included:

• 1 × BLUETTI B500K 5.12kWh Expansion Battery
• 1 x CA90* Battery Expansion Cable
• User Manual & Warranty Documentation

Specifications

Shopping Guide

Why Shop With Us

Why Shop With 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.

• Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.

• 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.