BLUETTI SolarX 4K Solar Charge Controller
- Connect a high-voltage solar array to compatible BLUETTI power stations and battery packs, converting 150–500V DC PV input to a DC output below 60V.
- Supports up to 4,200W of solar input and up to 4,000W DC output for higher-power BLUETTI solar-charging systems.
- Isolated MPPT charging with app connectivity, CAN communication and built-in electrical protection functions.
High-voltage solar charging for compatible BLUETTI systems
The BLUETTI SolarX 4K Solar Charge Controller enables suitable high-voltage rooftop or ground-mounted PV arrays to charge compatible BLUETTI portable power stations and battery packs. It accepts solar-array open-circuit voltage from 150V to 500V and provides a regulated DC output of 35V to 58V.
This is an installer-oriented component, designed for systems requiring more PV input than a portable power station’s standard solar input can accept. It is compatible with the BLUETTI Apex 300, B300K, B300 and B300S, subject to the correct output cable and system configuration.
Key features
- Up to 4,200W PV input and 4,000W maximum DC output.
- Single MPPT with stated maximum efficiency of 99%.
- High-voltage PV input range: 150V to 500V open-circuit voltage; MPPT operating range: 120V to 450V DC.
- CAN 2.0, Bluetooth and Wi-Fi connectivity for compatible BLUETTI system communication and app-based setup.
- Output overcurrent, short-circuit, overvoltage, reverse-polarity and insulation-detection protections.
Where to use
Use the SolarX 4K where a compatible BLUETTI battery or power station needs to be charged from a larger solar array. Typical examples include off-grid buildings, workshops, site accommodation, mobile-support installations and backup-power systems using BLUETTI battery equipment.
The controller has IP21 protection and is intended for installation in a dry, sheltered location. It is not a plug-and-play portable accessory: its PV input can reach 500V DC. Installation, commissioning and maintenance must be carried out by qualified professionals or trained personnel. Contact Energian’s UK expert team for compatibility checks or to arrange support through a trusted installation partner.
Technical specifications
| Brand | BLUETTI |
| Model | SolarX 4K Solar Charge Controller |
| Article number | A-CG-SOLARX-EU-0401 |
| PV maximum input power | 4,200W |
| PV open-circuit voltage | 500V DC maximum |
| PV start-up voltage | 150V DC |
| MPPT operating voltage | 120V DC to 450V DC |
| Number of MPPTs | 1 |
| Maximum input current | 13A |
| Maximum short-circuit current | 17A |
| MPPT efficiency | 99% maximum |
| Maximum DC output power | 4,000W |
| Maximum output voltage | 58V |
| Minimum output voltage | 35V |
| Maximum output current | 80A |
| DC output communication interface | RJ45 |
| Connectivity | CAN 2.0 / Bluetooth / Wi-Fi |
| Operating temperature | -20°C to 55°C; power output decreases above 45° |
| Overtemperature protection | 55°C |
| Storage temperature | -20°C to 55°C |
| Operating humidity | 10% to 90% RH |
| Operating altitude | ≤ 2,000m |
| Noise level | 52dB |
| Cooling method | Air cooling |
| Ingress protection rating | IP21 |
| Dimensions (L × W × H) | 288.4 × 474.0 × 90.2mm |
| Net weight | About 7.6kg |
| Protection functions | Output overcurrent protection; output short-circuit protection; input overvoltage protection; output overvoltage protection; input reverse-polarity protection; output reverse-polarity protection; insulation detection |
| Warranty | 2 years |
Compatible equipment
The SolarX 4K manual identifies compatibility with BLUETTI Apex 300 portable power stations and B300K, B300 and B300S battery packs. Connection requires the correct DC output cable for the equipment used. The manual references P090A, P150D and XT60-F output cable options; check the required cable and the connected equipment’s instructions before ordering.
In the box
- 1 × BLUETTI SolarX 4K Solar Charge Controller
- 8 × ST4.8 fixing screws
- 3 × M5 grounding screws
- 3 × grounding OT terminals
- 8 × anchors
- 1 × knockout connector
- 1 × hex socket wrench
- Documentation
Documents available for download
Shipping
Available for shipping to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, contact us on +44 2080 640335 or info@energian.co.uk for a quote.
UK expert support
UK expert support is available for solar-array sizing, voltage checks, BLUETTI compatibility, cable selection and off-grid system design. Contact Energian by phone, email or live chat, or visit our office for an in-person consultation.