BLUETTI Apex 300 + B300K Expansion Battery | Home Battery Backup
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Looking for a backup system that grows with you? The BLUETTI Apex 300 + B300K Expansion Battery delivers flexible, powerful home energy security
The BLUETTI Apex 300 + B300K Expansion Battery gives you an easy way to build a reliable home backup setup that’s both powerful and flexible. With up to 4,000W of solar input when paired with the SolarX 4K, you can turn sunshine into serious savings, cutting your energy costs and potentially paying off the system in as little as two years. From there, every bit of power you generate is money back in your pocket.
The Apex 300 is built with a modular design that lets you expand at your own pace. By adding the B300K Expansion Battery, you increase your storage capacity right away, and you still have the option to scale further. Connect extra units and additional batteries to reach up to 11.52kW of output and 58kWh of storage. It’s a setup that grows with your home instead of locking you into one size.
Home Backup
Off-Grid Power
RV Generator
Key Features of the Apex 300 + B300K Expansion Battery
- World's smartest off-grid portable power solution
- Super scalable from 2,764.8Wh to 58kWh capacity and 3,840W to 11.52kW output
- 2nd-gen automotive-grade LiFePO₄ battery built to last 17 years
- Pays for itself in as little as 2 years
- Real-time Extreme Weather Alerts via the BLUETTI App
- Plug-and-play setup with instant 20ms UPS switchover
- Ultra-low self-consumption, 2-3x more efficient than competitors
- Supports up to 11.52kW generator charging at 230V
- Up to 19.2kW solar charging using SolarX 4K(Sold Separately)
Energy Systems Designed for How You Live
Home Battery System
From a simple plug-in setup to full-home battery backup, build the system that matches your home's size and energy needs.
RV & Van Life Power
From charging devices to running small appliances, enjoy home-like comfort with plug-and-play setups built for life on the road.
True Off-Grid Freedom
Store solar energy, run essentials, and stay connected — all with a setup that's easy to expand and customize for your off-grid lifestyle.
Choose the Right Home Backup Solution
Essential Protection
Keep the basics running when the grid goes down — fridge, lights, WiFi, and more. Quick plug-and-play setup for instant peace of mind.
Whole-Home Battery Backup
Run high-demand appliances through long outages with 7,680W of reliable power. No hardwiring, just plug in and enjoy seamless, automatic backup.
Home Backup Power That Saves You Mone
With the BLUETTI app, you always know what your system is doing. You get early warnings during extreme weather, live power status, and accurate energy-saving insights. AI-powered optimisation and fast OTA updates make sure your system stays efficient and up to date. And with remote access, you can manage your home’s energy even when you’re not there.
Adaptable Energy, Easy to Expand
Quick Power from Any Source
Solar Charging
Get up to 80% in just 55 minutes, and a full charge in 75 minutes with 2,400W of solar power. With SolarX 4K, enjoy ultra-fast solar replenishment, reaching up to 30,000W.*
* Requires 3 Apex 300 units and 3 SolarX 4K units.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
Generator Charging
When solar power isn't an option, use a generator to fully charge your Apex 300 in 65 minutes with 3,450W of power. Stay ready no matter the conditions.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
TurboBoost AC Charging
Need a quick boost? Enable Turbo Charging and get 80% in just 45 minutes, and a full charge in 70 minutes, all using just one standard home wall outlet.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
Charge on the Go
Harness your alternator's excess power. No waste, no impact on fuel or engine performance. Use 560W to fully charge in 5.5 hours. Add solar, and you can charge up to 1,760W, reaching full power in just 1.8 hours.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
Ultra-Fast Solar Charging
Apex 300 + B300K + SolarX 4K
Fully charges in just 1.9 hours with 4,000W solar power, giving you quick access to energy for everyday devices like lights, small appliances, and electronics.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
2/Apex 300 + 4/B300K + 2/SolarX 4K
Powers up in 2.0 hours with 8,000W solar power, offering reliable energy for larger appliances, tools, and extended use, it is ideal for RVs or off-grid living.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
3/Apex 300 + 9/B300K + 3/SolarX 4K
Reaches full power in just 1.6 hours, providing ample energy for heavy-duty devices like air conditioners, refrigerators, or even home backup systems.
Note: Data tested by BLUETTI Labs. Actual charging times may vary.
Built to Last, Designed to Perform
The Apex 300 + B300K Expansion Battery is also built for tough, long-term performance. Thanks to the EnerBalance AI system, you get up to 6,000 cycles with 80 percent capacity retention. A magnetic-core transformer and five-stage efficiency design keep idle power loss low, while the 20ms UPS switchover protects sensitive devices. Military-grade testing adds confidence that this system is built to last.
Apex 300 + B300K Expansion Battery Specifications
What's in the Box of Apex 300 + B300K Expansion Battery?
