BLUETTI SolarX 4K Solar Charge Controller with P090D Cable

The BLUETTI SolarX 4K is a high-power solar charge controller designed to connect compatible high-voltage rooftop or ground-mounted solar arrays to supported BLUETTI power stations and expansion batteries. Accepting up to 4,200W of solar input and delivering up to 4,000W of charging power, it converts high-voltage 150V–500V solar input into safe, sub-60V output for faster home backup, RV, cabin and off-grid energy storage. This version includes the P090D connection cable for use with a compatible single BLUETTI Apex 300 configuration.

Product Information

Brand: BLUETTI
Model: SolarX 4K
Product Type: High-Voltage MPPT Solar Charge Controller
Included Connection Cable: P090D
Maximum Solar Input Power: 4,200W
Maximum Charging Output: 4,000W
Maximum Open-Circuit Voltage: 500V DC
Startup Voltage: 150V DC
MPPT Operating Voltage Range: 120V–450V DC
Maximum Output Voltage: 58V DC
Minimum Output Voltage: 35V DC
MPPT Channels: 1
Maximum MPPT Efficiency: Up to 99%
Connectivity: Wi-Fi, Bluetooth and CAN 2.0
Cooling Method: Active Air Cooling
Protection Rating: IP21
Compatible Systems: BLUETTI Apex 300, B300, B300K, B300S, AC300 and AC500
Warranty: 2 Years
Compatibility Note: The P090D version is intended for a compatible single Apex 300 setup. Other BLUETTI configurations may require a different cable, connector or system arrangement.

Key Features & Benefits

Up to 4,000W Solar Charging:
Delivers up to 4kW of charging power to compatible BLUETTI systems, helping recharge larger battery configurations faster during strong solar conditions.

Supports High-Voltage Solar Arrays:
Accepts solar-array input with a startup voltage of 150V and a maximum open-circuit voltage of 500V, allowing compatible rooftop and ground-mounted solar panels to charge supported BLUETTI power systems.

Safe Sub-60V Output:
Converts high-voltage solar input into a controlled 35V–58V DC output suitable for compatible BLUETTI power stations and expansion batteries.

Up to 99% MPPT Efficiency:
Advanced Maximum Power Point Tracking helps maximise available solar energy by continuously adjusting the controller’s operating point as sunlight and panel conditions change.

Galvanic Isolation Protection:
Uses isolated power-conversion technology to support stable charging while helping separate the high-voltage solar input from the lower-voltage BLUETTI battery system.

Wide Solar Panel Compatibility:
Works with suitable residential-style glass solar panels, ground-mounted arrays and other supported panels that remain within the SolarX 4K’s voltage, current and power limits.

Scalable Solar Charging:
A single SolarX 4K can provide up to 4kW of output, while supported multi-system Apex 300 configurations can use up to three SolarX 4K controllers for as much as 12kW of total solar charging.

Fast System Recharging:
BLUETTI states that a compatible system may recharge in approximately 1.9 hours with 4,000W of available solar input. Actual charging time depends on battery capacity, system configuration, sunlight and operating conditions.

Real-Time App Monitoring:
Wi-Fi and Bluetooth connectivity allow users to view operating information, monitor solar performance, receive firmware updates and troubleshoot supported system functions through the BLUETTI app.

CAN Communication:
The integrated CAN 2.0 communication interface supports coordinated operation with compatible BLUETTI power stations and battery systems.

Reliable Active Cooling:
Air cooling helps regulate internal temperature during high-power solar conversion and demanding charging conditions.

Home, RV and Off-Grid Flexibility:
Designed for applications ranging from residential backup and off-grid cabins to RV power systems, remote properties and custom solar energy configurations.

Mechanical Specifications

Product Type: High-Voltage Solar Charge Controller
Dimensions: 288.4 × 474 × 90.2mm
Net Weight: 7.6kg / 16.8lb
Installation Type: Fixed vertical wall installation
Cooling Method: Active Air Cooling
Maximum Noise Level: Approximately 52dB
Protection Rating: IP21
Operating Temperature: -20°C to 55°C / -4°F to 131°F
Maximum Operating Altitude: 2,000m / 6,562ft
Communication Interface: RJ45
Wireless Connectivity: Wi-Fi and Bluetooth
System Communication: CAN 2.0
Grounding: Grounding connection required according to the product instructions and applicable electrical regulations
Recommended Location: Dry, ventilated indoor or protected installation area

The IP21 enclosure is not designed for direct exposure to rain, water jets or severe outdoor weather. Professional installation is recommended, particularly when connecting high-voltage rooftop or ground-mounted solar arrays.

Warranty Information

Warranty: 2 Years
Customer Support: Lifetime Customer Support
Protection Rating: IP21
Installation Requirement: Install according to the BLUETTI user manual and all applicable electrical and solar installation requirements.
High-Voltage Safety: Solar arrays can remain energised whenever exposed to sunlight. Use appropriate isolation equipment and safety procedures before installation or maintenance.
Grounding Requirement: Proper grounding is required for safe and reliable operation.
Compatibility Requirement: Confirm the solar-array voltage, current, polarity and total wattage before connecting the SolarX 4K.
Environmental Requirement: Install in a dry and well-ventilated location within the specified operating-temperature range.
Professional Installation: Installation by a qualified solar or electrical professional is strongly recommended where required by local regulations.

Electrical Performance

Solar Input Specifications

Maximum Input Power: 4,200W
Maximum Open-Circuit Voltage – Voc: 500V DC
Startup Voltage: 150V DC
MPPT Operating Voltage Range: 120V–450V DC
Number of MPPT Channels: 1
Rated Input Current: 13A
Maximum Input Current: 17A
Supported Solar Source: Compatible rooftop, ground-mounted or portable solar-panel arrays within the controller’s electrical limits

The combined open-circuit voltage of the connected solar array must remain below 500V DC, including voltage increases that may occur during cold weather.

Charging Output Specifications

Maximum Output Power: 4,000W
Output Voltage Range: 35V–58V DC
Maximum Output Current: 80A
Output Connection: Compatible BLUETTI expansion or DC charging connection
Included Cable: P090D
Primary P090D Application: Compatible single BLUETTI Apex 300 configuration
Direct AC Output: Not Supported
Direct USB Output: Not Supported

The SolarX 4K functions as a solar charge controller and does not contain an integrated AC inverter or standalone battery. It must be connected to a compatible BLUETTI power station or battery system.

MPPT and Conversion Performance

Maximum MPPT Efficiency: Up to 99%
Conversion Type: High-Voltage DC to Low-Voltage DC
Isolation: Isolated MPPT Power Conversion
Solar Input: Up to 4,200W
Charging Output: Up to 4,000W
Thermal Protection: Overtemperature protection at approximately 55°C
Cooling: Active Air Cooling

Actual output may be lower than the rated maximum due to solar irradiance, array orientation, temperature, shading, wiring losses, battery state of charge and the connected system’s charging limits.

Compatibility

Compatible BLUETTI Products: Apex 300, B300, B300K, B300S, AC300 and AC500
P090D Version: Intended for a compatible single Apex 300 connection
Alternative Version: SolarX 4K with XT60 connection is available for supported parallel or alternative configurations
Solar Panel Compatibility: Compatible solar-panel arrays operating within the SolarX 4K input voltage, current and wattage limits
Residential Glass Panels: Supported when the complete array remains within the required electrical specifications
Maximum Solar Open-Circuit Voltage: 500V DC
MPPT Operating Range: 120V–450V DC
Startup Requirement: 150V DC
Maximum Input Current: 17A
Maximum Input Power: 4,200W
Parallel-System Limitation: SolarX 4K does not support every multi-AC300 or multi-AC500 parallel configuration. System compatibility must be confirmed before installation.
Connection Requirement: Use the correct BLUETTI cable and connection port for the selected power station or expansion battery.

Solar panels with different electrical ratings should only be combined when the final array configuration remains within the controller’s operating limits and has been assessed by a qualified installer.

Smart Energy Features

• Supports up to 4,200W of solar input
• Provides up to 4,000W of charging output
• Accepts high-voltage solar arrays up to 500V DC
• Converts solar input into safe 35V–58V DC charging
• Provides up to 99% MPPT efficiency
• Uses isolated MPPT power-conversion technology
• Supports compatible rooftop and ground-mounted solar arrays
• Supports selected BLUETTI power stations and expansion batteries
• Supports compatible single and multi-system configurations
• Scales from 4kW to as much as 12kW with supported Apex 300 systems
• Supports real-time monitoring through the BLUETTI app
• Provides Wi-Fi and Bluetooth connectivity
• Supports CAN 2.0 system communication
• Supports firmware updates and system troubleshooting
• Uses active air cooling for thermal management
• Provides overtemperature protection
• Supports home, RV, cabin and off-grid energy configurations

Applications

• Home backup solar charging
• Off-grid homes and cabins
• Rooftop solar integration
• Ground-mounted solar arrays
• BLUETTI Apex 300 energy systems
• B300, B300K and B300S battery charging
• AC300 and AC500 solar charging
• RV and caravan power systems
• Remote properties
• Emergency preparedness
• Power outage backup
• Small-business backup energy
• Workshops and sheds
• DIY solar energy systems
• Renewable energy storage
• Extended off-grid living

Included Accessories

BLUETTI SolarX 4K Solar Charge Controller × 1

P090D Connection Cable × 1

Hex Socket Wrench × 1

ST4.8 Fixing Screw × 1

M5 Grounding Screw × 1

Wall Anchor × 1

Knockout Connector × 1

OT Terminal × 1

Product Documents × 1

Package contents may vary by product version or market. This listing is for the SolarX 4K supplied with the P090D cable intended for a compatible single Apex 300 configuration.

System Benefits When Paired with Compatible BLUETTI Power Systems

• Provides up to 4,000W of high-speed solar charging
• Connects compatible high-voltage solar arrays to lower-voltage BLUETTI systems
• Helps recharge larger battery configurations faster during strong sunlight
• Supports rooftop and ground-mounted solar-panel integration
• Expands renewable charging beyond the built-in solar-input limits of supported power stations
• Provides up to 99% MPPT efficiency for improved solar-energy collection
• Supports scalable 4kW, 8kW and 12kW Apex 300 solar configurations
• Helps reduce reliance on grid electricity and fuel generators
• Improves backup-energy availability during power outages
• Supports extended off-grid operation for homes, cabins and RVs
• Provides app-based monitoring and firmware management
• Supports compatible BLUETTI power stations and expansion batteries
• Converts up to 500V DC solar-array input into safe sub-60V charging output
• Uses active cooling and integrated protection for reliable high-power operation
• Provides flexible renewable-energy integration for residential, mobile and remote applications
• Supports longer off-grid power use when paired with a correctly designed solar array, compatible BLUETTI power system and appropriate installation accessories.

Contact PVtoEV for compatibility guidance, solar-array design support and complete BLUETTI SolarX 4K, power station, expansion battery and solar charging recommendations.