PAXCESS Rockman 300 Portable Power Station User Manual
Brand: PAXCESS | Model: ROCKMAN 300
1. Introduction
This user manual provides essential information for the safe and efficient operation of your PAXCESS Rockman 300 Portable Power Station. Please read this manual thoroughly before using the device and retain it for future reference. The Rockman 300 is designed to provide reliable power for various applications, including outdoor activities, emergency backup, and mobile work setups.
2. Product Overview
The PAXCESS Rockman 300 is a compact and powerful portable power station featuring a 288Wh (78000mAh) lithium-ion battery. It offers multiple output ports to charge and power a wide range of electronic devices and small appliances.

Figure 2.1: Front view of the PAXCESS Rockman 300 Portable Power Station, showing the display, various output ports, and the foldable handle.
Key Features:
- High Capacity: 288Wh / 78000mAh lithium-ion battery.
- Multiple Outputs: Power up to 8 devices simultaneously.
- Pure Sine Wave AC Output: Provides stable and clean power, safe for sensitive electronics.
- Portable Design: Lightweight (7.3 lbs) with a foldable handle for easy transport.
- Advanced Safety: Built-in Battery Management System (BMS) for protection against short circuit, overcharge, over/under voltage, over current, overload, and over temperature.
- LCD Display: Shows real-time charge/discharge status and battery life.
Output Ports:
- 1 x 110V Pure Sine Wave AC Outlet: 300W continuous, 500W peak.
- 1 x Car Outlet: 12V/10A (120W max).
- 2 x DC Outputs: 12V/10A.
- 1 x QC 3.0 USB Port: 18W max for fast charging compatible devices.
- 2 x USB Ports: 5V/3A.
- 1 x Type-C PD Port: 20V/1.5A (30W max) for input and output.

Figure 2.2: Illustration of the Rockman 300's capability to power up to 8 devices concurrently.

Figure 2.3: The portable design of the Rockman 300, highlighting its compact size and foldable handle for easy transport.
3. Setup
Initial Charging:
Before first use, it is recommended to fully charge the PAXCESS Rockman 300. This ensures optimal battery performance and longevity. The unit comes with an AC adapter and charging cable.
Charging Methods:
The Rockman 300 offers five versatile ways to recharge:
- AC Wall Outlet: Connect the included AC adapter to a standard wall outlet. Full recharge in approximately 8 hours.
- Solar Panel (Sold Separately): Use a compatible PAXCESS 120W solar panel for outdoor charging. Full recharge in 5-7 hours under direct sunlight.
- Car Port: Recharge from your vehicle's 12V car port using the included charging cable. Full recharge in approximately 16 hours.
- USB-C PD Input: Utilize the 30W USB-C PD port for charging.
- USB-C PD Input + AC Adapter: Combine both the 30W USB-C PD input and the AC adapter for faster charging, achieving a full recharge in approximately 4 hours.

Figure 3.1: Visual representation of the five different charging methods available for the Rockman 300.
4. Operating Instructions
Turning On/Off:
To turn on the unit, press and hold the main power button until the LCD screen illuminates. To turn off, press and hold the power button again until the screen turns off.
Using Output Ports:
- AC Output: Press the "AC" button to activate the 110V AC outlet. Plug in your device. Ensure the device's power consumption does not exceed 300W continuous (500W peak).
- DC/Car Outlet: Press the "DC" button to activate the 12V DC and car outlets. Plug in your 12V devices.
- USB Outputs: The USB-A and USB-C PD ports are typically active when the unit is on. Simply plug in your USB-powered devices.
Important Note:
The Rockman 300 cannot support devices rated over 300W. Attempting to power devices with higher wattage may trigger the unit's protection mode. Examples of devices typically exceeding 300W include electric drills, induction cookers, microwave ovens, rice cookers, hairdryers, and electric kettles.

Figure 4.1: Examples of high-wattage devices that are not compatible with the Rockman 300's 300W output limit.
LCD Display:
The integrated LCD display provides real-time information including input wattage, output wattage, and remaining battery percentage. Monitor this display to manage your power usage effectively.
Pure Sine Wave Output:
The AC outlet provides a pure sine wave output, which is crucial for sensitive electronic devices like laptops, medical equipment (e.g., CPAP machines), and audio equipment. This ensures stable power delivery without damaging your devices, unlike modified sine wave inverters.

Figure 4.2: Illustration demonstrating the clean, stable waveform of pure sine wave output compared to potentially harmful modified sine wave output.
5. Maintenance
Storage:
- Store the unit in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, charge the unit to approximately 50-80% every 3-6 months to preserve battery health.
- Avoid storing in environments with high humidity or corrosive substances.
Cleaning:
Use a soft, dry cloth to clean the exterior of the power station. Do not use abrasive cleaners or immerse the unit in water.
Battery Care:
To maximize the lifespan of the lithium-ion battery, avoid completely draining the unit frequently. Recharge the unit when the battery level is low.
6. Troubleshooting
If you encounter issues with your PAXCESS Rockman 300, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on or respond. | Battery is completely drained; unit is in protection mode. | Connect the unit to an AC wall outlet for charging. If it was overloaded, disconnect all devices and recharge to reset. |
| AC output not working. | AC output not activated; device exceeds 300W; unit is overheated. | Press the "AC" button to activate. Check device wattage. Allow unit to cool down if overheated. |
| Charging is slow or not initiating. | Incorrect charger used; solar panel not in direct sunlight; charging cable faulty. | Ensure you are using the original AC adapter or a compatible solar panel. Position solar panel for maximum sunlight. Try a different charging cable. |
| Overload warning (LCD shows "!") | Connected device exceeds the maximum output wattage for a port or the unit. | Immediately disconnect the overloaded device. The unit will reset after a short period. Use devices within the specified wattage limits. |
If the problem persists after attempting these solutions, please contact PAXCESS customer support for further assistance.
7. Technical Specifications
| Specification | Detail |
|---|---|
| Model Name | ROCKMAN 300 |
| Capacity | 288Wh / 78000mAh |
| Battery Type | Lithium-Ion |
| AC Output | 110V, 60Hz, 300W (500W Peak) Pure Sine Wave |
| DC Output | 2 x 12V/10A |
| Car Outlet | 1 x 12V/10A (120W max) |
| USB-A Output | 2 x 5V/3A |
| USB-A QC 3.0 Output | 1 x 18W max |
| USB-C PD Input/Output | 1 x 20V/1.5A (30W max) |
| Dimensions (L x W x H) | 10.6" x 7.1" x 6.5" |
| Weight | 7.3 Pounds |
| Charging Time (AC) | Approx. 8 hours |
| Charging Time (AC + USB-C PD) | Approx. 4 hours |
| Charging Time (Solar 120W) | Approx. 5-7 hours (in full sun) |
| Charging Time (Car Port) | Approx. 16 hours |
8. Warranty and Support
PAXCESS provides an 18-month warranty for the Rockman 300 Portable Power Station from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use.
Additionally, PAXCESS offers lifelong technical support for your product. If you have any questions, require assistance with troubleshooting, or need to claim warranty service, please refer to the contact information provided on the official PAXCESS website or your purchase documentation.
Please retain your proof of purchase for warranty claims.





