BLUETTI SolarX 4K | Solar Charge Controller

Original price was: €599.00.Current price is: €499.00.

-17%

Compatibility: Apex 300, B300, B300K, B300S, AC300, AC500
Ultra-Fast Solar Charging: Delivers up to 4 kW of solar power, so your BLUETTI batteries charge faster and your devices stay powered longer, even off the grid.
Universal Solar Support: Supports solar panels from 150 V to 500 V, safely stepping down to below 60 V for effortless, worry-free charging.
Reliable & Safe Power: MPPT technology with isolation ensures steady performance, maximizes solar energy, and protects your devices.

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Description
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BLUETTI SolarX 4K | Solar Charge Controller

Seamless Solar Compatibility, Supercharged

BLUETTI SolarX 4K – Meet the world’s first 4 kW solar charge controller. The BLUETTI SolarX 4K takes 150–500 V from nearly any rooftop or ground array and converts it into safe, sub-60 V charging for BLUETTI power stations—up to 4,000 W. 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.
2 × Apex 300 + 4 × B300K + 2 × 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.

Charge Your BLUETTI System, Your Way

SolarX 4K works seamlessly with a wide range of BLUETTI power stations and battery packs, from Apex 300 and AC300 to AC500, B300K, B300, and B300S. Whether you’re charging one unit, several at once, or mixing stations with batteries, SolarX 4K delivers safe, efficient, and flexible solar charging tailored to your setup.
*For details, please refer to the FAQs.

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.

BLUETTI SolarX 4K Specifications

GENERAL		OUTPUT
MPPT Efficiency:	99% Max.	Output Power	4,000 W
Connectivity	CAN 2.0/Bluetooth/Wi-Fi	Max. Output Voltage	58 V
Overtemperature Protection	55°C (131°F)	Min. Output Voltage	35 V
Storage Temperature	-20°C to 55°C (-4°F to 131°F)	Max. Output Current	80 A
Operating Temperature	-20°C to 55°C (-4°F to 131°F)	Communication Interface	RJ45
Operating Humidity	10% to 90% RH	INPUT
Operating Altitude	≤ 2,000 m (6,562 ft)	Max. Input Power	4,200 W
Noise Level	52 dB	Open-Circuit Voltage	500 VDC
Cooling Method	Air Cooling	Startup Voltage	150 VDC
Protection Grade	IP21	MPPT Operating Voltage	120 VDC to 450 VDC
Net Weight	7.6 kg (16.8 lbs)	Number of MPPT	1
Dimensions (L × W × H)	288.4 × 474.0 × 90.2 mm	Rated Input Current	13 A
Warranty	2 Years	Max. Input Current	17 A

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FAQS

Any installation precautions for SolarX 4K? Can I do it myself?
Wear insulated gloves for safety. You can install it yourself if you have basic electrical knowledge. If you’re unsure, it’s best to let a professional handle the installation.
Is grounding required?
Yes, grounding is required for safe operation.
The SolarX 4K has three grounding terminals (left, middle, and right):
● Right terminal: Mandatory grounding. Connect this to earth (usually to the ground bar of the home’s electrical panel).
● Middle terminal: For input-side grounding. Use this if your solar panels require grounding.
● Left terminal: For battery charging. Connect to this if the battery has grounding requirements.
What’s the terminal on the right side of the solar input used for?
It’s for the ACFI (Arc Fault Circuit Interrupter) connection, designed to protect the system from arc faults by automatically disconnecting when a fault occurs.
Can glass solar panels connect to SolarX 4K?
Yes, provided the voltage and current are within SolarX 4K’s limits.
Can different types of solar panels be mixed with SolarX 4K?
A: No. The SolarX 4K has only one MPPT input.
What kind of PV disconnect switch is needed?
Use a DC switch (PV isolator) rated for at least 600 V and 20 A. Make sure to use 2 positive and 2 negative wires (12–10 AWG, around 4–5 mm²) with MC4 connectors to match your solar panels.
Is there a minimum or start‑up PV voltage for SolarX 4K?
Yes, the starting voltage is 150V. Below that, the charging won’t begin.
What BLUETTI models work with SolarX 4K?
The SolarX 4K works with these models:
● Power stations: Apex 300, AC300/AC500 (with expansion battery).
● Battery packs: B300K, B300, B300S, B4810, B1210, B1232.
IMPORTANT: Ensure you use the correct connection cable for each unit.
The AC300 requires an ARM version in the 4032 series, while the AC500 requires the 4044 series. For updated details, please contact us at sale-uk@bluettipower.com with your product model, SN, and current ARM version.
Can SolarX 4K charge multiple Apex 300 units in parallel?
Yes. Use the XT60 DC output cable (sold separately).
What if there are two SolarX 4K units for two Apex 300s in parallel?
The setup is nearly the same. Install each SolarX 4K normally and then connect them.
Why are there CA90 short cables and P090D/A long cables for connecting SolarX 4K?
Both connect the same way, but they support different power levels:
● CA90 short cable: Up to 4,000 W.
● P090D/A long cable: Up to 3,000 W-3,500 W.
The difference is due to cable length—shorter cables have less power loss, so they deliver more power efficiently.
How much input power is available with Apex 300 + B300K?
Up to 4,000 W with the CA90 short cable, or 3,500 W with the long cable. Extra solar panels can be added directly to the Apex 300’s DC input, achieving up to 6,400 W combined (4,000 W + 2,400 W).
Can solar panels be connected if the total voltage exceeds 500 V?
No, the total voltage from the solar panels must not exceed 500V, as this can damage the unit. However, the current can exceed the 13A limit.
For example, a 350 W solar panel with an open-circuit voltage of 43.8 V should be limited to a maximum of 12 panels in series.
Can I connect other devices to the remaining XT60 ports on SolarX 4K if I use one or two Apex 300 units?
No.
Can SolarX 4K charge a system with mixed battery packs?
Yes, supported combinations include:
● Apex 300 with mixed battery packs (Apex 300 + B300/B300K/B300S)
● Battery pack mixes (B300 + B300K + B300S)
● AC300/AC500 with mixed battery packs (AC300 + B300/B300K, AC500 + B300/B300K)