BLUETTI B500K Expansion Battery | 5120Wh LiFePO4

High-capacity 5.12kWh LiFePO₄ expansion battery for BLUETTI home backup, off-grid and modular power systems BLUETTI B500K Expansion Battery | 5120Wh LiFePO₄ The BLUETTI B500K Expansion Battery adds a substantial 5,120Wh (5.12kWh) of LiFePO₄ battery storage to compatible BLUETTI power systems, giving you considerably longer runtime for home backup, off-grid living, RVs and remote applications. Designed as part of BLUETTI's expandable energy ecosystem, the B500K allows you to start with the battery capacity you need today and add significantly more storage as your energy requirements grow. 5,120Wh Capacity LiFePO₄ Battery Modular Expansion Up to 100kWh+ Systems Solar Ready Home & Off-Grid Important: The B500K is primarily an expansion battery and does not provide conventional 230V AC power by itself. For normal household AC appliances it must be connected to a compatible BLUETTI power station/system. Some applications and BLUETTI products may require additional cables or accessories. Massive 5.12kWh Capacity Add 5,120Wh of battery storage to your compatible BLUETTI system, significantly extending runtime during outages or off-grid operation. Build a Larger System BLUETTI's modular architecture allows multiple B500K batteries to form much larger energy-storage systems as your power requirements grow. LiFePO₄ Technology Advanced lithium iron phosphate battery chemistry provides excellent durability, thermal stability and long service life for regular backup and off-grid use. Flexible Installation Designed for fixed or mobile applications, the B500K can form part of a home, off-grid or RV system and includes mounting points for suitable installations. 🔧 What’s Included 1 × BLUETTI B500K Expansion Battery 1 × Battery Expansion Cable (CA90 Short Cable) 1 × User Manual 🔋 Extend Your Backup Time Battery capacity determines how long your system can continue supplying energy. Adding a B500K provides another 5.12kWh of stored energy, making it particularly useful where overnight runtime, extended outages or periods of poor solar generation need to be covered. Applications include: Home backup systems Off-grid homes & cabins Rural properties RVs & motorhomes Remote worksites Extended camping Solar energy storage 🏠 Expandable Home & Off-Grid Storage One of the B500K's biggest advantages is scalability. Rather than replacing your complete power system when you need more storage, compatible BLUETTI systems allow additional expansion batteries to be added. BLUETTI states that configurations can scale from a single 5.12kWh B500K to systems exceeding 100kWh when multiple Apex 300 power stations and B500K batteries are combined. 1 × B500K 5.12kWh additional storage 2 × B500K 10.24kWh additional storage 3 × B500K 15.36kWh additional storage 4 × B500K 20.48kWh additional storage Maximum supported battery quantities depend on the BLUETTI power station and overall system configuration. ☀️ Solar & Off-Grid Integration When combined with compatible BLUETTI equipment, the B500K can form part of a substantial solar-powered off-grid energy system. Using BLUETTI's SolarX 4K, compatible configurations can harvest up to 4,000W of solar power, while mobile systems can also integrate compatible BLUETTI alternator charging equipment. This flexibility makes the B500K suitable for applications ranging from additional home backup capacity to serious remote and off-grid power systems. ⚡ More Than Just Expansion While primarily designed as an expansion battery, the B500K can also work with compatible BLUETTI ecosystem accessories to provide DC power. When connected to the optional BLUETTI Hub D1, up to 700W of DC output can be made available for suitable devices. 🔋 Built for Long-Term Energy Storage The B500K uses LiFePO₄ (Lithium Iron Phosphate) battery chemistry, well suited to applications requiring regular charging and discharging over a long service life. BLUETTI combines the battery cells with its battery management and thermal-control systems to provide stable operation across demanding home, mobile and off-grid applications. 🏠 Fixed or Mobile Installation The B500K includes mounting points allowing it to be secured in suitable home or RV installations. For applications where the battery needs to be moved, it can also be paired with BLUETTI's optional Foldable Trolley 2. 🔌 Compatibility The B500K is designed to work across a range of compatible BLUETTI power systems and accessories, including newer modular BLUETTI configurations such as the Apex 300. Some older BLUETTI systems may require an additional connection cable. For example, connection to the AC500 requires the appropriate P090D to P150D cable, sold separately. Not sure whether the B500K is compatible with your BLUETTI system? Contact us with your power station model and we'll help confirm the correct battery and connection requirements. Technical Specifications Battery Capacity 5,120Wh / 5.12kWh Battery Chemistry LiFePO₄ Product Type Expansion Battery System BLUETTI Modular Energy Storage DC Output Up to 700W with compatible Hub D1 Solar Integration Up to 4,000W with compatible SolarX 4K configuration Installation Fixed or mobile with compatible accessories Frequently Asked Questions How much capacity does the B500K add? Each B500K provides 5,120Wh or 5.12kWh of additional LiFePO₄ battery storage. Can the B500K power normal 230V appliances by itself? No. The B500K is primarily an expansion battery and does not contain a conventional 230V AC inverter. For household AC appliances it needs to be connected to a compatible BLUETTI power station or system. Does the B500K work with the Apex 300? Yes. The B500K can be used to substantially expand the battery capacity of compatible Apex 300 systems. Can I add more than one B500K? Yes. Compatible BLUETTI systems support multiple expansion batteries. The maximum number depends on the power station and overall system configuration. Can the B500K be charged from solar? Yes, when connected within a compatible BLUETTI system. Solar charging capability and maximum input depend on the power station, charge controller and system configuration being used. Can I use the B500K for off-grid living? Yes. Its 5.12kWh capacity makes it particularly useful for expanding off-grid battery storage and increasing overnight or poor-weather runtime. Can the B500K provide DC power? Yes, when paired with compatible BLUETTI ecosystem components such as the Hub D1, which can provide up to 700W of DC output. Does the battery expansion cable come with it? Yes. A CA90 short battery expansion cable is included with the B500K.