Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
MPN No: Apex 300 + B300K
Expected ship date Sep 13 - 16
In Stock
4,496.00
-6%
$4,199.00
Sale
Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
Regular price
$4,496.00
-6%
$4,199
7% OFF
LESS THAN 50
Sale
Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
Available
MPN No: Apex 300 + B300K
Regular price
$4,496.00
-6%
$4,199
Expected ship date Sep 13 - 16
Ships from U.S. Warehouse
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Expert U.S. Support
We offer multiple secure payment options for your convenience
We offer multiple secure payment options for your convenience
Regular price
$4,496.00
-6%
$4,199
Bluetti Apex 300 + (3) B300K Expansion Battery Combo (Home Battery Backup)
MPN No:
Apex 300 + B300K
Expected ship date Sep 13 - 16
Sale
BLUETTI Apex 300 + Three B300K Expansion Batteries
3,840W portable power system with 11,059.2Wh of LiFePO4 battery storage
This bundle pairs one BLUETTI Apex 300 power station with three B300K expansion batteries for buyers who need substantially longer backup time without moving to a permanently installed battery system. It is well suited for essential home loads, RV power, off-grid cabins, mobile work and emergency preparedness.
The complete system provides 11,059.2Wh of nominal storage. The three B300K batteries extend runtime, but they do not raise the Apex 300 above its 3,840W continuous AC output. That distinction is important when sizing the system for air conditioners, pumps, tools and other high-demand equipment.
3,840W Continuous AC output
11,059.2Wh Combined nominal capacity
120V + 240V Simultaneous AC operation
6,000+ Cycles LiFePO4 battery design
This is a high-capacity single-inverter system. Adding batteries increases stored energy and runtime, not output wattage. Increasing AC output requires additional Apex 300 units and the separately sold Hub A1 parallel package.
Apex 300 Connections
What’s Included
The Apex 300 and each B300K include their standard accessories. Components may arrive in separate cartons.
Apex 300 Power Station
- One BLUETTI Apex 300
- One AC charging cable
- One car charging cable
- One grounding screw
- User documentation
Three B300K Expansion Batteries
- Three BLUETTI B300K batteries
- Three CA90 battery connection cables
- User documentation for each battery
Items Not Included
Solar panels, PV extension leads, SolarX 4K, Hub D1, Hub A1, home integration equipment, transfer-switch hardware, trolley, generator and installation labor are not included unless your order or selected option specifically says otherwise.
Why This Bundle Makes Sense
More Than 11kWh of Storage
Three B300K batteries add 8,294.4Wh to the Apex 300’s internal battery. The result is enough stored energy for longer outages, overnight loads and multi-day use when power demand is managed carefully.
120V and 240V at the Same Time
The Apex 300 can operate 120V and 240V equipment simultaneously. Total combined AC demand must stay within the system’s 3,840W continuous output rating.
Solar-Ready for Off-Grid Use
The Apex 300 accepts up to 2,400W of compatible solar directly. The optional SolarX 4K supports higher-voltage arrays and up to 4,000W of solar input.
Room to Expand Further
One Apex 300 supports up to six compatible expansion batteries. This bundle uses three B300Ks, leaving room for three additional batteries and a maximum single-unit capacity of 19,353.6Wh.
Long-Life LiFePO4 Batteries
The Apex 300 and B300K use LiFePO4 battery chemistry designed for frequent cycling, thermal stability and long service life.
UPS and App Controls
The Apex 300 supports fast UPS transfer modes and BLUETTI app monitoring over Wi-Fi and Bluetooth. Available functions include power monitoring, operating settings, firmware updates and system alerts.
What Can It Run?
A single Apex 300 can supply up to 3,840W continuously across its AC outputs. It can support many refrigerators, freezers, lights, electronics, sump pumps, power tools and selected 240V loads when the combined running wattage and startup demand remain within the inverter limits.
The larger battery bank changes how long equipment can operate, not how many watts the inverter can produce. Check both running power and startup surge before ordering for motor-driven appliances.
Illustrative Runtime Estimates
| Example Load | Assumed Power Draw | Estimated Runtime |
|---|---|---|
| Wi-Fi router | 20W | Approximately 470 hours |
| CPAP machine | 50W | Approximately 188 hours |
| Full-size refrigerator | 150W average | Approximately 62.7 hours |
| Large television | 200W | Approximately 47 hours |
| Continuous medium load | 500W | Approximately 18.8 hours |
| Continuous heavy load | 1,000W | Approximately 9.4 hours |
| High continuous load | 2,000W | Approximately 4.7 hours |
Wi-Fi router20W draw · approximately 470 hours
CPAP machine50W draw · approximately 188 hours
Full-size refrigerator150W average · approximately 62.7 hours
Large television200W draw · approximately 47 hours
Continuous medium load500W draw · approximately 18.8 hours
Continuous heavy load1,000W draw · approximately 9.4 hours
High continuous load2,000W draw · approximately 4.7 hours
Runtime estimates use 85% of the bundle’s 11,059.2Wh nominal capacity. Actual results vary with inverter overhead, operating mode, temperature, battery condition, cycling loads, startup surges and device efficiency. Use the connected appliance’s measured power draw when planning backup time.
Before You Buy
- One Apex 300 remains a 3,840W inverter after the three B300K batteries are connected.
- The 50A-style AC receptacle does not mean one Apex 300 can continuously deliver 50A. Total AC output remains limited to 3,840W, or about 16A at 240V.
- The Apex 300 does not provide direct DC output ports. Add the separately sold Hub D1 if you need regulated DC, USB or high-current Anderson outputs.
- Plug-in backup is ready to use after setup. Powering household circuits or adding automatic backup requires compatible integration hardware and professional installation.
- The Apex 300 and B300K batteries are not waterproof. Keep the equipment and all connections dry and follow the required operating clearances.
- The components weigh approximately 279 lb combined. Each unit ships separately, and two-person handling or a compatible trolley is recommended.
Product Specifications
Complete Bundle
| Specification | Details |
|---|---|
| Included Products | One Apex 300 and three B300K expansion batteries |
| Total Nominal Capacity | 11,059.2Wh (11.06kWh) |
| Continuous AC Output | 3,840W |
| Lifting Power | Up to 7,680W for compatible resistive loads; not a continuous rating |
| AC Voltage | 120V and 240V simultaneous operation |
| Battery Chemistry | LiFePO4 |
| Approximate Product Weight | 278.9 lb before cables and packaging |
| Solar Panels Included | No |
| Hub D1 Included | No |
| Home Integration Hardware Included | No |
Included ProductsOne Apex 300 and three B300K expansion batteries
Total Nominal Capacity11,059.2Wh (11.06kWh)
Continuous AC Output3,840W
Lifting PowerUp to 7,680W for compatible resistive loads; not a continuous rating
AC Voltage120V and 240V simultaneous operation
Battery ChemistryLiFePO4
Approximate Product Weight278.9 lb before cables and packaging
Solar Panels IncludedNo
Hub D1 IncludedNo
Home Integration IncludedNo
BLUETTI Apex 300
| Specification | Details |
|---|---|
| Battery Capacity | 2,764.8Wh (51.2V, 54Ah) |
| Continuous AC Output | 3,840W pure sine wave |
| Lifting Power | 7,680W for compatible resistive loads |
| AC Output Voltage | 120V / 240V, 60Hz |
| Native Solar Input | 2 × 1,200W; 12–60V DC, 20A per input |
| Expanded Solar Input | Up to 4,000W with optional SolarX 4K |
| Car Input | 12V or 24V through the included car charging cable |
| App Control | BLUETTI app through Wi-Fi and Bluetooth |
| UPS Transfer | 0ms or 20ms depending on the selected mode and configuration |
| Cycle Life | 6,000+ cycles to 80% original capacity |
| Weight | 83.78 lb (38 kg) |
| Dimensions | 20.67 × 12.87 × 12.60 in |
| Warranty | 5 years |
Battery Capacity2,764.8Wh (51.2V, 54Ah)
Continuous AC Output3,840W pure sine wave
Lifting Power7,680W for compatible resistive loads
AC Output Voltage120V / 240V, 60Hz
Native Solar Input2 × 1,200W; 12–60V DC, 20A per input
Expanded Solar InputUp to 4,000W with optional SolarX 4K
App ControlWi-Fi and Bluetooth
UPS Transfer0ms or 20ms depending on mode and configuration
Cycle Life6,000+ cycles to 80% original capacity
Weight83.78 lb (38 kg)
Dimensions20.67 × 12.87 × 12.60 in
Warranty5 years
BLUETTI B300K Expansion Battery
| Specification | Details |
|---|---|
| Quantity Included | Three |
| Capacity Per Battery | 2,764.8Wh (51.2V, 54Ah) |
| Total Added Capacity | 8,294.4Wh |
| Battery Chemistry | LiFePO4 |
| Cycle Life | 6,000+ cycles to 80% original capacity |
| Standalone Output | USB-A, 5V/2.4A, 12W maximum |
| Expansion Ports | 2 × 58.4V DC maximum, 90A maximum |
| Connection Cable | One CA90 cable included with each battery |
| Charging Temperature | 32°F to 104°F (0°C to 40°C) |
| Discharging Temperature | -4°F to 104°F (-20°C to 40°C) |
| Weight Per Battery | 65.04 lb (29.5 kg) |
| Dimensions Per Battery | 20.67 × 12.87 × 8.23 in |
| Warranty | 3 years standard; one additional year available with product registration |
Quantity IncludedThree
Capacity Per Battery2,764.8Wh (51.2V, 54Ah)
Total Added Capacity8,294.4Wh
Battery ChemistryLiFePO4
Cycle Life6,000+ cycles to 80% original capacity
Standalone OutputUSB-A, 5V/2.4A, 12W maximum
Expansion Ports2 × 58.4V DC maximum, 90A maximum
Connection CableOne CA90 cable included with each battery
Charging Temperature32°F to 104°F (0°C to 40°C)
Discharging Temperature-4°F to 104°F (-20°C to 40°C)
Weight Per Battery65.04 lb (29.5 kg)
Dimensions Per Battery20.67 × 12.87 × 8.23 in
Warranty3 years standard; one additional year available with registration
Specifications are based on current manufacturer information and may be revised without notice. Confirm final voltage, current, connector and installation requirements against the supplied manuals before commissioning the system.
Frequently Asked Questions
What is the total battery capacity of this bundle?
The Apex 300 contains 2,764.8Wh and the three B300K batteries add 8,294.4Wh, for 11,059.2Wh of combined nominal capacity.
Do the three B300K batteries increase the Apex 300’s output?
No. The batteries increase stored energy and runtime. One Apex 300 remains limited to 3,840W of continuous AC output.
Can it power 120V and 240V equipment at the same time?
Yes. The Apex 300 supports simultaneous 120V and 240V output. Total combined AC demand must remain within its 3,840W continuous rating.
Does the 50A receptacle provide 50A continuously?
No. One Apex 300 still supplies a maximum of 3,840W continuously. At 240V, that is approximately 16A total continuous output.
Can this bundle provide whole-home backup?
It can run many essential household loads, but whole-home suitability depends on the home’s load profile. Direct connection to household circuits or automatic backup requires compatible integration equipment, proper circuit design and professional installation. That hardware is not included.
Are the battery connection cables included?
Yes. This bundle includes three CA90 battery connection cables, one with each B300K.
Are solar panels included?
No. Solar panels, array wiring and any additional PV adapters or extension leads must be selected separately unless your order specifically lists them.
How much solar can the Apex 300 accept?
The Apex 300 has two native solar inputs rated at up to 1,200W each, for 2,400W total under compatible voltage and current conditions. The optional SolarX 4K supports up to 4,000W and higher-voltage PV arrays.
Can the system charge from a generator?
Yes. The Apex 300 can recharge from a compatible generator through an approved AC charging method. Generator voltage, frequency, grounding and output quality must meet BLUETTI requirements.
Can I add more B300K batteries later?
Yes. One Apex 300 supports up to six compatible expansion batteries. This three-battery bundle can accept up to three additional B300Ks for 19,353.6Wh of total nominal capacity.
Can I add another Apex 300 later?
Yes. BLUETTI supports parallel systems with two or three Apex 300 units and the correct Hub A1 package. Two units can provide up to 7.68kW and three can provide up to 11.52kW of continuous AC output. Additional Apex units and Hub A1 are not included here.
Can the B300K batteries be used by themselves?
Each B300K has a 12W USB-A port for charging small devices, but it does not contain an AC inverter. In this bundle, household AC power comes from the Apex 300.
Does this bundle include DC outputs?
The Apex 300 does not have direct DC output ports. Add the separately sold Hub D1 if you need regulated 12V or 24V DC, USB or high-current Anderson outputs.
Can the system be used outdoors?
The system is useful for RV and off-grid applications, but the Apex 300 and B300K batteries are not waterproof. Keep the equipment and all electrical connections dry and within the specified temperature and ventilation limits.
How should I plan for the weight?
The Apex 300 weighs about 83.8 lb and each B300K weighs about 65 lb. Treat them as four separate heavy components, use two-person lifting when needed, and consider a compatible trolley if the system will be moved frequently.
About BLUETTI
BLUETTI develops portable power stations, expansion batteries, solar charging equipment and home backup systems for outages, RVs, mobile work and off-grid use. Its modular product line lets customers begin with a portable system and add storage, charging or home integration equipment as their needs change.
Why Buy From US Solar Supplier
US Solar Supplier is an American-founded company based in Kentucky. We offer equipment from established power and energy-storage manufacturers, along with practical support before and after the sale.
Need help confirming appliance loads, solar compatibility or the accessories required for your installation? Call 1-800-230-7004 and our team will help you review the system before you order.
