BLUETTI SolarX 4K Ultra Fast MPPT Solar Charging Controller for Apex 300

Free shipping to the 48 states. We also ship to PR, HI, AK, VI, Guam, and Saipan — message us for a quote.  

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Warranty Information

Full factory warranty applies to all customers, including island locations. 
The only exception is warranty shipping to and from island locations, which is not included.
We offer a low‑cost 5‑year Replacement Shipping Protection plan that covers those shipping costs.

SKU: SolarX 4K

Description

The Bluetti SolarX 4K delivers up to 4,200W of solar input for ultra‑fast charging.

Compatible with Apex 300, B300, B300K, B300S, AC300, and AC500 systems.

Supports solar panels from 150V to 500V with safe step‑down below 60V.

Advanced MPPT technology ensures maximum efficiency and device protection.

Provides reliable 4,000W output with stable voltage and current control.

Connectivity options include CAN 2.0, Bluetooth, and Wi‑Fi.

Compact design with IP21 protection and low 52 dB noise level.

Ideal for off‑grid, backup, and renewable energy applications.

Lightweight 16.8 lbs build with durable construction.

Covered by a 2‑year manufacturer warranty.

KEY BENEFITS

• Ultra‑fast solar charging up to 4,200W

• Wide voltage support from 150V to 500V

• Safe step‑down below 60V for worry‑free use

• Reliable MPPT technology with 99% efficiency

• Compatible with multiple Bluetti power stations

Product Overview

The Bluetti SolarX 4K is a high‑performance solar charging module designed to maximize renewable energy usage. With advanced MPPT control, wide voltage compatibility, and robust safety features, it ensures efficient and reliable charging for Bluetti power stations.

Features

1. 4,200W maximum solar input

2. 4,000W stable output power

3. MPPT efficiency up to 99%

4. Supports 150V–500V solar panels

5. Safe voltage step‑down below 60V

6. RJ45 communication interface

7. CAN 2.0, Bluetooth, Wi‑Fi connectivity

8. IP21 protection grade

9. Overtemperature protection at 55°C

10. Compact 288.4 × 474 × 90.2 mm design

Ideal Applications

1. Off‑grid living

2. Home backup systems

3. RV and camper setups

4. Outdoor events

5. Emergency power supply

6. Remote construction sites

7. Renewable energy projects

8. Disaster relief operations

9. Sustainable farming setups

10. Industrial backup solutions

Technical Specifications

• Max Input Power: 4,200W

• Open Circuit Voltage: 500VDC

• Startup Voltage: 150VDC

• MPPT Operating Voltage: 120–450VDC

• Rated Input Current: 13A

• Max Input Current: 17A

• Output Power: 4,000W

• Output Voltage: 35–58V

• Max Output Current: 80A

• Noise: 52 dB

• Dimensions: 288.4 × 474 × 90.2 mm

• Weight: 7.6 kg (16.8 lbs)

What’s in the Box

• Bluetti SolarX 4K Module

• User Manual

Warranty

2 Years Manufacturer Warranty

Final Verdict

The Bluetti SolarX 4K is a powerful, efficient, and reliable solar charging solution for anyone seeking fast, safe, and versatile renewable energy integration with Bluetti systems.