BLUETTI SolarX 4K Solar Charge Controller
Meet the world's first 4kW solar charge controller. The BLUETTI SolarX 4K takes 150–500V from nearly any rooftop or ground array and converts it into safe, sub-60V charging for BLUETTI power stations—up to 4,000W. That means faster charging, more stored energy, and reliable power whether you're backing up your home, running an off-grid cabin, or building your own solar farm.
Scalable Solar Power, 4 kW to 12 kW
SolarX 4K lets you decide how much solar power fits your life. Use one unit to cover daily essentials, or scale up to three for your whole home. It connects to your existing solar setup via AC coupling, keeping BLUETTI's DC input ports free for extra panels, so you get more energy, faster, without tying up your system.
Apex 300 B300K SolarX 4K
Charge to full in just 1.9 hours with 4,000 W solar, fast enough to keep lights, small appliances, and everyday devices ready when needed.
Note: Data tested by BLUETTI Labs. Actual charging times may vary
2x Apex 300 4x B300K 2x SolarX 4K
8,000 W solar delivers reliable energy for larger appliances, power tools, and extended off-grid living.
3×Apex 300 9×B300K 3×SolarX 4K
Scale to 12 kW, plus 7.2 kW from extra panels for a total of 19.2 kW, enough for heavy loads like central air conditioners, refrigerators, or a full home backup.
Control Your Solar Power Anywhere, Anytime
Easily monitor your system in real-time, receive firmware updates, and troubleshoot instantly, all from the BLUETTI app, giving you complete control wherever you are.
Tech Specs INPUT Max. Input Power4,200 W Open-Circuit Voltage500 VDC Startup Voltage150 VDC MPPT Operating Voltage120 VDC to 450 VDC Number of MPPT1 Rated Input Current13 A Max. Input Current17 A OUTPUT Output Power4,000 W Max. Output Voltage58 V Min. Output Voltage35 V Max. Output Current80 A Communication InterfaceRJ45 GENERAL MPPT Efficiency99% Max. ConnectivityCAN 2.0/Bluetooth/Wi-Fi Overtemperature Protection55°C (131°F) Operating Humidity-20°C to 55°C (-4°F to 131°F) Operating Altitude≤ 2,000 m (6,562 ft) Noise Level52 dB Cooling MethodAir Cooling Net Weight7.6 kg (16.8 lbs) Protection GradeIP21 Dimensions (L × W × H)288.4 × 474.0 × 90.2 mm Warranty2 Years IN THE BOX
SolarX 4K x 1
P090D x 1
Hex Socket Wrench x 1
Fixing Screw (ST4.8) x 1
Grounding Screw (M5) x 1
Anchor x 1
Knockout Connector x 1
OT Terminal x 1
Documents x 1