POWER SOLUTIONS FOR HOME, WORK & OFF-GRID
All Solar
Best Sellers
New Arrivals
On Sale Now
Staff Picks
Top Rated
Monocrystalline
Bifacial
Flexible
Rigid Panels
High-Wattage Panels
Home Solar Kits
Off Grid Solar Kits
RV Solar Kits
Marine Solar Kits
Starter Kits
Roof Mounts
Ground Mounts
Pole Mounts
Adjustable Mounts
Mounting Hardware
Home Solar
Off Grid Solar
RV Solar
Marine Solar
Cabin Solar
PV Wire
MC4 Connectors
Combiner Boxes
Disconnects
Monitoring
All Batteries
LiFePO4
Lithium Ion
AGM
Lead Acid
Battery Cells
Rack Batteries
Wall Batteries
Cabinet Systems
Stackable Batteries
Whole Home Storage
Under 100Ah
100Ah
200Ah
300Ah
400Ah+
12V Batteries
24V Batteries
48V Batteries
High Voltage
Low Voltage
BMS Systems
Battery Monitors
Battery Boxes
Battery Cables
Busbars
All Inverters
Pure Sine
Modified Sine
Off Grid
Grid Tie
Hybrid
Under 1000W
1000-3000W
3000-6000W
6000W+
10kW+
12V
24V
48V
Split Phase
Charge Controllers
Battery Chargers
MPPT Controllers
Smart Meters
EV Chargers
Inverter Cables
Remote Panels
Mounting Kits
Cooling Fans
All Backup
Portable Generators
Inverter Generators
Standby Generators
Solar Generators
Whole Home Generators
Manual Transfer Switches
Automatic Transfer Switches
Interlock Kits
Power Inlets
Transfer Panels
Gas Generators
Propane Generators
Dual Fuel Generators
Diesel Generators
Battery Backup
Whole Home Backup
Essential Loads
Commercial Backup
Emergency Power
Generator Ready Systems
Under 2000W
2000-5000W
5000-10000W
20kW+
All Electrical
Battery Cable
Welding Cable
Solar Cable
SOOW Cable
SJOOW Cable
Cable Lugs
Ring Terminals
Anderson Plugs
Butt Connectors
Fuses
Fuse Blocks
Circuit Breakers
DC Disconnects
Surge Protectors
Junction Boxes
Power Panels
Breaker Panels
Heat Shrink
Cable Clamps
Conduit Fittings
Grounding Kits
Weather Boxes
All Portable
Small Power Stations
Mid-Size Power Stations
Large Power Stations
Expandable Power Stations
Home Backup Stations
Car Jump Starters
Truck Jump Starters
Lithium Jump Starters
Power Pack Jump Starters
Jump Starter Accessories
Folding Panels
Suitcase Panels
Solar Chargers
Backpack Panels
Portable Panel Kits
RV Power
Van Power
Marine Power
Overland Power
Vehicle Inverters
Small Power Banks
Laptop Power Banks
High Capacity Power Banks
Solar Power Banks
USB-C Power Banks
About us
Contact us
Price Match
Privacy Policy
Shipping/Returns
Terms of Service
Warranties
Search
Blog
Chat
Newsletter
Reviews
Affiliate Program
Financing
One Tree Planted
Smile Rewards Center
Sponsorship
Wholesale
Shipping options calculated at checkout
Total: $0.00
BLUETTI B500K Expansion Battery | 5,120Wh
Notify me when this product is available:
Couldn't load pickup availability
Estimated Arrival: Between Jul 31 and Aug 11.
Increase your energy storage as needed, from 5.12 kWh to over 100 kWh*. The B500K battery is compatible with various BLUETTI power stations for easy, cost-effective upgrades.
*Note: Achieved with 3*Apex 300 +18*B500K units
From outage protection to camping trip and off-grid working, the B500K keeps you powered for longer — more freedom and peace of mind.
The B500K either expands your BLUETTI power stations, or serves as a high-capacity power bank with ecosystem components, delivering 700 W DC output for your devices.
The B500K works with old, existing, or future BLUETTI power stations and expansion batteries.
The B500K adopts advanced LiFePO₄ batteries for over a decade of safe use. Its third-gen wireless internal design and efficient cooling fan ensure stable performance, even in challenging conditions.
Secure the B500K to the wall or rack of your home or RV using its mounting holes, or attach it to the Foldable Trolley 2* for a mobile power supply.
BATTERY INFO
Model
B500K
Battery Capacity
5,120Wh
Battery Type
LiFePO₄ (Lithium Iron Phosphate)
Cycle Life
4,000+ cycle to 80% original capacity
Weight
45kg (99.21lbs)
Dimensions (L × W × H)
520 × 327 × 308.5 mm / 20.47 × 12.87 × 12.15 in
Charging Temperature
0°C to 40°C / 32°F to 104°F
Discharging Temperature
-20°C to 40°C / -4°F to 104°F
Storage Temperature
Up to 1 month: -20°C to 40°C / -4°F to 104°F Up to 6 months: -20°C to 25°C / -4°F to 77°F
Working Humidity
5% to 95%RH
Charging Current
65A Max. (Current may decrease outside specified temperatures)
Discharging Current
70A Max.
2 × Expansion Port
58.4VDC Max., 90A Max.
Warranty
4 Years
Compatibility
AC200L, AC200MAX, AC300, AC500, Apex 300, B300K
Build The Power warrants that the product will be free from defect in workmanship and material to the original consumer purchaser.
The warranty period starts on the date of purchase by the original consumer purchaser,
No warranty for gifts product and Warranty period may vary by country subject to local laws and regulations.
Any defects in material, workmanship of your product will be covered after you provide any valid proof of purchase and information including but not limited to:
Note: The limited warranty is restricted to the country of purchase. The warranty will be invalid on the items once they are taken or shipped to other countries.
Order Cancellation can be requested by customer within 48 hours after placing an order by email or phone with the Build The Power official store.
If the product has been shipped, an intercept fee will be charged.
This limited warranty is in lieu of all other expressed or implied warranties, including any warranty of fitness for a particular purpose or use and any implied warranty of merchantability otherwise applicable to Build The Power portable solar generators. Build The Power and its affiliated companies shall not be liable for any special, incidental or consequential damages, including lost profits. There are no warranties extended other than as provided herein.
This limited warranty may be modified only by Build The Power. Any implied warranties allowed by law shall be limited in duration to the terms of the express warranty provided herein. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights. You also have other rights from state to state. Build The Power’s only liability shall be the repair or replacement as stated above.