BESTEK 300W Pure Sine Wave Power Inverter User Manual

1. Introduction

The BESTEK 300W Pure Sine Wave Power Inverter converts 12V DC power from your vehicle's battery into 110V AC power, suitable for a wide range of electronic devices. This inverter produces a pure sine wave output, which is identical to the AC power waveform from a standard electrical grid. This ensures stable and clean power delivery, making it ideal for sensitive electronics and extending the lifespan of your devices.

Pure sine wave inverters are recommended by most cordless tool manufacturers to ensure long battery life and optimal performance. This device minimizes interference with radios, communication, and precision equipment, providing a reliable power source for your needs.

2. Product Overview

The BESTEK 300W Pure Sine Wave Power Inverter is designed for convenience and reliability. It features multiple output options and integrated safety mechanisms.

Key Features:

• Pure Sine Wave Output: Provides stable and clean AC power.
• Dual AC Outlets: Two 110V AC outlets for powering various appliances.
• Dual USB Charging Ports: Two 4.8A USB ports for charging mobile devices.
• Intelligent Cooling Fan: Automatically adjusts speed based on temperature and load to prevent overheating.
• Comprehensive Protection System: Safeguards against over-voltage, undervoltage, overheat, overload, reverse polarity, and short circuits.
• Compact Design: Ideal for portability and use in vehicles.

3. Setup

The BESTEK 300W Pure Sine Wave Power Inverter offers two primary methods for connecting to a 12V DC power source:

Method 1: Cigarette Lighter Plug

For loads under 150W, you can connect the inverter directly to your vehicle's cigarette lighter socket using the provided cable. Most car fuses are rated for 150W, so ensure your devices do not exceed this limit when using this connection method.

Method 2: Alligator Battery Clamps

For loads up to the full 300W capacity, connect the inverter directly to your car battery terminals using the provided alligator clamps. Connect the red clamp to the positive (+) terminal and the black clamp to the negative (-) terminal of the battery. This method bypasses the vehicle's cigarette lighter fuse, allowing for higher power draw.

Unboxing and Setup Video

This video provides an overview of the BESTEK 500W Pure Sine Wave Power Inverter, demonstrating unboxing and setup procedures that are generally applicable to the 300W model.

This video demonstrates the features and connection methods for a 300W/500W car power inverter, including both cigarette lighter and battery clamp connections.

A short video showcasing the MWXNE 300W Power Inverter in use, demonstrating its compact size and ease of connection in a vehicle.

This video provides simple steps on how to use a 300W sine wave power inverter, covering basic operation and connection.

4. Operating Instructions

Once connected to a 12V DC power source, you can begin using your BESTEK 300W Pure Sine Wave Power Inverter.

Powering On/Off

Flip the ON/OFF switch to the 'ON' position to activate the inverter. The LED indicator light will illuminate, indicating that the inverter is operational. The ON-OFF switch specifically controls the 3-prong AC outlets.

Using AC Outlets and USB Ports

Plug your 110V AC devices into the dual AC outlets. For charging mobile devices, use the two 4.8A USB charging ports. The inverter can simultaneously power multiple devices, provided the total wattage does not exceed 300W.

Intelligent Cooling Fan

The built-in cooling fan will start running slowly once the inverter is powered on, even under no load. This is normal operation and part of the new design to ensure proper function. The fan has 4 gears of rotating speed that self-adjust based on the internal temperature and the power load, increasing speed as needed to dissipate heat effectively.

5. Maintenance

To ensure the longevity and safe operation of your BESTEK 300W Pure Sine Wave Power Inverter, regular maintenance is recommended.

Fuse Replacement

The inverter is equipped with external replaceable fuses for protection. When connected directly to your battery, it uses 2 x 40 amp/32V fuses, which are readily accessible from the back of the inverter. If connected via the cigarette lighter, the vehicle's designated 15 amp fuse will be used for protection. Always replace fuses with ones of the correct rating.

6. Troubleshooting

The Intelligent Protection System of the inverter is designed to protect your devices and the inverter itself from various electrical issues.

Overload Condition

If the total load connected to the inverter exceeds 300W, the inverter will automatically sense the overload condition and shut down AC power. This will be indicated by a flashing red light. To reset the overload condition, power the inverter 'Off' and then 'On' again. Ensure that the total wattage of your connected devices does not exceed the inverter's rated capacity.

The inverter also protects against over-voltage, undervoltage, overheat, reverse polarity, and short circuits. It will not drain your battery dry due to an under-voltage protection point.

7. Specifications

8. Warranty and Support

Your BESTEK 300W Pure Sine Wave Power Inverter comes with an 18-Month Product Replacement Warranty. For any questions or dissatisfactions with your purchase, BESTEK provides 24H x 7D technical and friendly customer service support.