The BLUETTI Charger 2 is a vehicle-based charging system designed to charge a portable power station using your vehicle’s alternator, solar panels, or a combination of both. It also supports bidirectional power transfer and auxiliary battery connections. The specifications below are based primarily on BLUETTI’s published product information and user manual.

BLUETTI Charger 2 — Full Specifications
1. Main specifications
Maximum combined charging
1,200 W
Alternator input
800 W
Solar input
600 W
Weight
1.59 kg
Dimensions: 265 × 169 × 69.7 mm (10.43 × 6.65 × 2.74 inches). 
2. Complete electrical specifications

Important: These are maximum port ratings, not guaranteed continuous charging rates. Actual output depends on the connected battery or power station, vehicle electrical system, solar conditions, temperature, and the device’s operating mode.

Port / function Specification
ALT — alternator input/output Up to 800 W
ALT at 12.8 V 62.5 A
ALT at 25.6 V 31.3 A
PV — solar input Up to 600 W
Solar voltage range 13–50 V DC
Maximum solar current 20 A
CHG — power station charging output Up to 1,200 W
CHG voltage range 12–56 V DC
Maximum CHG current 24 A
BAT — bidirectional battery port Up to 1,000 W
BAT at 19.2 V 52 A
BAT at 25.6 V 39 A
BAT at 51.2 V 19.5 A
DC Panel / DC Hub connection Up to 700 W in the V4.0 manual
DC panel voltage range 40–58.5 V DC
Reverse charging 100 W, 50/60 Hz
Fuse 75 A

Physical and environmental specifications

Specification Details
Product type DC-to-DC alternator and solar charger
Model CHARGER 2
Dimensions (L × W × H) 265 × 169 × 69.7 mm
Dimensions in inches 10.43 × 6.65 × 2.74 in
Net weight 1.59 kg / 3.51 lb
Operating temperature −20°C to 60°C
Storage temperature −20°C to 60°C
High-temperature derating Power decreases above 40°C
Operating humidity 10%–90%
Maximum noise level 50 dB
Operating altitude Below 2,000 m / 6,561 ft
Ingress protection IP20
Fuse rating 75 A

4. Charging functions
Alternator charging
Up to 800 W
Charges a compatible power station while the vehicle is running, using a dedicated vehicle-battery connection rather than a standard cigarette-lighter socket.
Solar charging
Up to 600 W
Accepts solar input from 13–50 V DC, with a maximum current of 20 A, subject to panel compatibility and conditions.
Bidirectional battery connection
Up to 1,000 W
The BAT port supports compatible auxiliary batteries and power products. The direction and power level depend on the connected equipment and configuration.

5. Compatibility
BLUETTI advertises compatibility with its own power stations and approximately 95% of third-party portable power stations. However, that percentage does not guarantee that every model will work at full power or without additional cables or settings. 
Before purchasing, check these points:
The power station’s supported DC charging voltage and maximum input current.
Whether the appropriate charging cable or adapter is included or sold separately.
Whether your vehicle’s alternator and electrical system can support the charging load.
Whether your solar panel’s open-circuit voltage stays within the specified input limits.

6. Safety and protection features
The manufacturer lists the following electrical protections:
Short-circuit protection
Reverse-polarity protection
Overcurrent protection
Overvoltage protection
Undervoltage protection
75 A fuse
The unit is rated IP20, meaning it is intended for protected installation rather than direct exposure to rain, splashing water, or dust-heavy outdoor conditions. 
7. Installation and practical considerations
Installation: Requires proper electrical wiring to the vehicle battery and secure connections; professional installation is advisable if you are unfamiliar with high-current DC wiring.
Heat: Maximum power may not be available in hot environments, particularly above 40°C.
Solar panels: Stay within the 13–50 V input range and 20 A maximum current.
Vehicle use: The available alternator power depends on the vehicle and its electrical system.
DC Hub specifications: BLUETTI’s online product listing and its V4.0 manual show differing DC-panel power figures. Confirm the rating for your exact hardware revision before connecting a DC Hub. 
8. Official documentation
BLUETTI Charger 2 User Manual
Installation, wiring, operation, and technical specifications.
Official product support
Compatibility FAQs, setup