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BLUETTI B300 Expansion Battery | 3,072Wh

by Bluetti

SKU B300
Original price $2,299.00

Save $300.00 Save $0.00
Original price $2,299.00 - Original price $2,299.00
Original price $2,299.00
Current price $1,999.00
$1,999.00 - $1,999.00
Current price $1,999.00

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The BLUETTI B300 Expansion Battery is an essential power source for your home or outdoor ventures. It features Flexible Recharging capabilities with 200W Max. solar input, 12V/10A cigarette lighter, AC, and lead-acid battery charging. Its 3,072Wh capacity offers up to 80% of the original capacity and over 3,500 life cycles and can be expanded with BLUETTI AC200MAX, AC200P, or AC300 series for multiple uses. It has a 100W USB-C, 12V/10A cigarette lighter, and 18W USB-A output ports to power your devices.

Charge or power up your devices with the BLUETTI B300 Expansion Battery. Boasting 3,072Wh and multiple charging ports, you can take it on the go with a car output of 12V/10A and up to 200W maximum loading scale. With its smart MPPT, you can recharge quickly with solar power, a wall socket, car charging, or a lead-acid battery (with D050S).


Flexible Recharging: You can recharge BLUETTI B300 quickly with 200W Max. solar input thanks to the built-in MPPT. Besides, it also supports AC, car, and lead-acid battery charging. The car and lead-acid battery charging need a D050S.
Versatile Power Source: You can power your smartphones, laptops, fans, lights, refrigerators, microwave ovens, and so on with specific output ports - the 100W USB-C, 12V/10A cigarette lighter, and 18W USB-A output ports.
Expandable Battery Pack: B300 has a 3,072Wh capacity and over 3,500 life cycles with the LifePO4 battery cells, offering up to 80% of the original capacity. Moreover, it will double, triple, or even quadruple the total capacity with BLUETTI AC200MAX, AC200P, or AC300 series.
Home Backup and Trip Power Bank: Whether in a family gathering or camping trip, B300 will serve as your backup power supply or power bank. It powers your home and camping necessities well, and all you need to do is enjoy the good times.


  • Features with a 100W USB-C, a 12V/10A car output, and USB-A ports, you can use the B300 as a portable power station.
  • The smart MPPT inside of the B300 enables it to recharge quickly through solar power at a 200W maximum loading scale.
  • You can also recharge it with a wall socket, car charging, or a lead-acid battery.
  • Car charging and lead-acid battery charging need to be realized through D050S.
Specification Information
Capacity 3,072Wh (51.2V, 60Ah)
Type LiFePO4 (Lithium Iron Phosphate)
Life Cycles 3500+ Cycles to 80% Original Capacity
Shelf-life Recharge to 80% Every 3-6 Months
Management System MPPT Controller, BMS, etc.
USB-C Port 1 x 100W Max.
USB-A Port 1 x 18W USB-A
12V DC Outlet* 1 x 12V/10A (Car Outlet)
*All Regulated.
AC Input 500W Max.
Solar Input 200W Max., VOC 12-60VDC, 10A
Car Input 12/24V from Cigarette Lighter Port
Max Input 700W, With AC Adapter + Solar Input Simultaneously
AC ≈6.5~7 Hours at 500W
Solar ≈15.5~16 Hours at 200W
(With prime sunshine, ideal orientation, and low temperature)
12V/24V Car Outlet ≈30 or 15 Hours

AC + Solar ≈5 Hours at 700W
(With prime sunshine, ideal orientation, and low temperature)
Solar + Solar ≈5 Hours at 700W

(D050S DC Charging Enhancer REQUIRED)
Dual AC ≈5 Hours at 700W

(Extra adapter REQUIRED)
240V Split Phase Bonding Yes, works with AC300
Pass-through Charging Yes
Weight 79.6 lbs (36.1 kg)
Dimensions (LxWxD) 20.5 x 12.5 x 10.5 in (52 x 32 x 26.6 cm)
Operating Temperature -4-104℉ (-20-40℃)
Storage Temperature -4-104℉ (-20-40℃)
Certifications UL2743, UKCA, RCM, PSE, FCC, CE
Warranty 48 Months (Learn more about BLUETTI warranty policy)



Owner's Manual


Q1: Which BLUETTI power stations can work with B300? A: The BLUETTI B300 expansion battery can work with the following power stations: - AC300 - AC200 - AC200P - AC200MAX - EB150 - EB240 - EP500Pro Please note that for power stations other than AC300, an additional accessory is required for each station: AC200/AC200P: P090D to XT90 cable EB150/EB240: P090D to DC7909 cable EP500Pro: P090D to MC4 cable
Q2: Can I use BLUETTI B300 expansion battery alone? A: Yes. The B300 expansion battery can be used alone. It comes with a 100W USB-C, a USB-A, and a 12V car socket, providing power for phones, laptops, car refrigerators, etc.
Q3: How many B300 can I connect to AC300 or AC200MAX? A: The number of B300 batteries you can connect depends on the power station: - AC300: Up to 4 B300 batteries for a capacity of 12,288Wh. - AC200MAX: Up to 2 B300 batteries for a capacity of 8,192Wh.
Q4: Does B300 support App control? A: Yes. When connected to the AC300, you can pair the B300 with the BLUETTI App, allowing you to control the system remotely at any time.
Q5: Can I use B300 alone as a UPS? A: No, the B300 expansion battery cannot be used alone as a UPS. It requires the AC300 or other compatible power stations to function properly.
Q6: What is the maximum input charging power of the BLUETTI B300? A: The maximum input charging power for the BLUETTI B300 is 700W when using the optional D050S DC Charging Enhancer. The D050S is sold separately.
Q7: Can I use a car cigarette lighter or lead-acid battery to charge B300? A: Yes, you can use a car cigarette lighter or lead-acid battery to charge the B300, but you will need the BLUETTI D050S DC Charging Enhancer (sold separately) for this purpose.
Q8: Can I use third-party solar panels to charge the BLUETTI B300? A: Yes, you can use third-party solar panels to charge the BLUETTI B300 if the solar panels meet the following specifications: 1) Total Voltage: 12-60V 2) Total Power: 200W Max. 3) Include MC4 connectors.
Q9: Can it charge and discharge at the same time? A: Yes, the B300 can charge and discharge simultaneously.
Q10: Can I use or charge B300 in sub-zero temperatures? A: The temperature ranges for the BLUETTI B300 are as follows: - Charge: 0-40°C (32-104°F) - Discharge: -20-40°C (-4-104°F) - Storage: -20-40°C (-4-104°F) Technically, the B300 can power electrical devices under such temperature conditions, but it is advised to avoid charging it in sub-zero temperatures.
Q11: How long can it run my device? A: The running time of the B300 for a specific device can be calculated using the following formula: Running time = Battery capacity × DoD × η ÷ Device rated power DoD refers to Depth of Discharge, and η is the local inverter efficiency. For the B300, both DoD and η are 90%. As an example, if you run a 100W light bulb with the B300, the running time will be approximately: 3,072Wh × 90% × 90% ÷ 100W ≈ 25 hours Please note that the above data is for reference only and individual results may vary.
Q12: Is the BLUETTI B300 waterproof? A: No, the BLUETTI B300 expansion battery is not waterproof. It is recommended to avoid storing it in a humid environment for an extended period.
Q13: Is it possible to replace the built-in battery in B300? A: No, it is not possible to replace the built-in battery in the BLUETTI B300. If the battery pack is faulty or dead, please contact BLUETTI Customer Service for assistance.
Q14: I'd like more tutorial videos on the AC300 and B300 combo. A: Sure, please follow BLUETTI Support on YouTube for more tutorial videos on the AC300 and B300 system.

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