BLUETTI B500K Expansion Battery – 5,120Wh LiFePO4 Home Backup Battery
Product Overview
Take your backup power system to the next level with the BLUETTI B500K Expansion Battery. Featuring an impressive 5,120Wh (5.12kWh) capacity, advanced LiFePO4 battery technology, and a durable modular design, this powerful expansion battery provides additional energy storage for home backup, RV travel, off-grid living, and emergency preparedness.
Designed to integrate with compatible BLUETTI power stations, including the Apex 300, AC300, AC500, AC200L, and AC200MAX, the B500K allows you to expand your energy system as your power requirements grow.
With more than 4,000 charging cycles to 80% original capacity, advanced internal battery protection, and flexible installation options, the B500K is built for years of dependable energy storage.
Key Features & Benefits
- Massive 5,120Wh Battery Capacity: Add 5.12kWh of stored energy to your compatible BLUETTI power system.
- Long-Lasting LiFePO4 Technology: Durable lithium iron phosphate battery chemistry offers excellent cycle life and thermal stability.
- 4,000+ Battery Cycles: Designed to retain approximately 80% of original capacity after more than 4,000 cycles.
- Expandable Energy Storage: Build larger backup systems with compatible BLUETTI power stations and expansion batteries.
- Up to 100kWh System Capacity: Supported multi-unit configurations can provide more than 100kWh of total energy storage.
- Wide BLUETTI Compatibility: Supports Apex 300, AC300, AC500, AC200L, AC200MAX, and compatible B300K systems.
- Up to 700W DC Output: Supports compatible DC power accessories and ecosystem configurations.
- Advanced Internal Construction: Third-generation wireless internal design helps improve durability and reliability.
- Efficient Cooling System: Integrated cooling technology helps maintain stable operating temperatures.
- Flexible Installation: Designed for compatible wall-mounted, rack-mounted, or trolley-supported arrangements.
- Smart Energy Ecosystem: Integrates with compatible BLUETTI accessories, including SolarX 4K and Hub D1.
- 4-Year Manufacturer Warranty: Backed by BLUETTI's stated limited warranty coverage.
Expandable Energy Storage Up to 100kWh
The BLUETTI B500K offers a scalable approach to energy storage, allowing users to expand their backup systems without replacing existing compatible equipment.
From a single 5.12kWh battery to a large multi-unit backup system, the B500K is designed for applications ranging from essential appliance backup to more extensive household energy storage.
According to the supplied manufacturer configuration, a system consisting of three Apex 300 power stations and eighteen B500K batteries can exceed 100kWh of combined battery capacity.
Important: Maximum capacity requires multiple compatible power stations, expansion batteries, cables, and additional accessories. All equipment beyond the selected B500K battery is sold separately unless specifically included in a bundle.
Compatible BLUETTI Power Stations
- BLUETTI Apex 300: Expand energy storage for advanced home backup and off-grid applications.
- BLUETTI AC500: Add battery capacity to compatible modular home energy systems.
- BLUETTI AC300: Extend backup runtime for household appliances and electronics.
- BLUETTI AC200L: Increase available stored energy for portable and emergency power.
- BLUETTI AC200MAX: Expand battery capacity for RV travel and backup applications.
- BLUETTI B300K: Supports specified compatible battery configurations.
Connection Note: A P090D-to-P150D cable is required for connecting the B500K with the AC500 and is sold separately.
Other configurations may require specific connection cables, compatible firmware, or additional BLUETTI accessories. Confirm compatibility before installation.
Advanced LiFePO4 Battery Technology
The B500K features high-capacity lithium iron phosphate battery cells designed for dependable long-term operation.
With more than 4,000 charging cycles to 80% original capacity, this battery is engineered for years of regular use. Its advanced internal construction and integrated cooling system help support stable performance across a variety of operating environments.
Flexible Wall, Rack & Trolley Installation
Designed for versatile energy storage, the B500K offers flexible placement options for compatible installations.
- Wall Installation: Secure the battery using manufacturer-approved mounting hardware and installation methods.
- Rack Installation: Suitable for compatible energy storage arrangements.
- Mobile Configuration: Can be used with the compatible BLUETTI Foldable Trolley 2, sold separately.
At approximately 99.21 pounds, the B500K requires appropriate lifting assistance and mounting support. Follow all manufacturer installation instructions.
Ideal Applications
- Emergency home backup during power outages
- Extended backup for refrigerators and essential appliances
- Off-grid cabins and remote properties
- RV and mobile energy systems
- Solar energy storage
- Residential energy management
- Compatible small business backup systems
Product Specifications
| Brand | BLUETTI |
| Model | B500K |
| Product Type | LiFePO4 Expansion Battery Module |
| Battery Capacity | 5,120Wh / 5.12kWh |
| Battery Chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Battery Cycle Life | 4,000+ Cycles to 80% Original Capacity |
| Maximum System Expansion | Over 100kWh in Supported Multi-Unit Configurations |
| Compatible Power Stations | Apex 300, AC300, AC500, AC200L, AC200MAX |
| Additional Compatibility | Compatible B300K Configurations |
| DC Output | Up to 700W with Compatible Accessories |
| Expansion Ports | 2 |
| Expansion Port Rating | 58.4V DC Maximum, 90A Maximum |
| Maximum Charging Current | 65A |
| Maximum Discharging Current | 70A |
| Dimensions | 20.47" L × 12.87" W × 12.15" H |
| Net Weight | Approximately 99.21 lb |
| Charging Temperature | 32°F to 104°F |
| Discharging Temperature | -4°F to 104°F |
| Storage Temperature (Up to 1 Month) | -4°F to 104°F |
| Storage Temperature (Up to 6 Months) | -4°F to 77°F |
| Operating Humidity | 5%–95% RH |
| Installation Options | Compatible Wall, Rack, or Trolley Configurations |
| Manufacturer Warranty | 4-Year Limited Warranty |
What's Included
- 1 × BLUETTI B500K Expansion Battery
- 1 × CA90 Battery Expansion Cable
- 1 × Product Documentation
Important: Package contents may vary depending on the selected configuration. The P090D-to-P150D cable required for AC500 compatibility is sold separately.
Power stations, solar panels, additional expansion batteries, mounting hardware, and optional accessories are not included unless specifically stated.
Product Manual & Installation Guides
📘 BLUETTI B500K User Manual & Setup Information
For official installation instructions, compatible cable requirements, safety guidelines, and operating information, visit:
BLUETTI Official Website & Product Support
A direct downloadable PDF manual for the exact B500K model has not been independently verified. Contact BLUETTI support to request the latest official documentation.
Manufacturer Warranty
🛡️ 4-Year Limited Manufacturer Warranty
The BLUETTI B500K is listed with a 4-year manufacturer warranty, subject to applicable manufacturer terms, eligibility requirements, and exclusions.
Warranty coverage generally addresses qualifying defects in materials or workmanship during the applicable coverage period.
Warranty claims may require valid proof of purchase and product identification. Damage caused by misuse, unauthorized modifications, improper installation, or operation outside manufacturer guidelines may be excluded.
Official Warranty Information: View BLUETTI Warranty Terms
Manufacturer Contact Information
Manufacturer: BLUETTI
Customer Support Email: service@bluettipower.com
Customer Support Phone: +1 (909) 570-0909
Official Website: www.bluettipower.com
Warranty Information: BLUETTI Warranty Support
For technical assistance, compatibility questions, installation guidance, replacement parts, or warranty claims, please contact BLUETTI manufacturer support directly.
Care & Safety Information
- Use only with compatible BLUETTI power stations and approved accessories.
- Keep the battery protected from rain, snow, standing water, and excessive moisture.
- Operate in a dry, properly ventilated environment.
- Do not charge the battery below 32°F (0°C).
- Avoid excessive heat, direct flames, and prolonged exposure to extreme temperatures.
- Do not disassemble, puncture, crush, or modify the battery.
- Use appropriate lifting assistance when moving the 99.21 lb battery.
- For wall or rack installations, use manufacturer-approved hardware and appropriate structural support.
- Follow the manufacturer's recommended battery maintenance and storage procedures.
- Inspect all cables and connectors before use.
Shipping & Delivery
🚚 Flat-Rate Shipping: $25.00
A flat-rate shipping charge of $25.00 applies to this product for eligible delivery addresses within the contiguous United States.
📦 Estimated Delivery: Please allow 4 weeks for delivery.
Shipping Exclusions: We do not ship this product to Alaska, Hawaii, or Puerto Rico.
Delivery times may vary depending on inventory availability, destination, freight handling, and carrier conditions.
Important: Due to its lithium battery and product weight, the BLUETTI B500K may be subject to additional carrier transportation and handling requirements.
Build a More Powerful Backup Energy System
Expand your energy storage with the BLUETTI B500K 5,120Wh Expansion Battery. With high-capacity LiFePO4 technology, broad BLUETTI compatibility, flexible installation options, and scalable energy storage, the B500K offers a dependable solution for home backup, off-grid living, and emergency preparedness.
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