How to Hook Up Your Inverter: Cable Size and Connections

Small Inverters (450 Watts and Under):

For smaller inverters, 450 watts or less, the setup is simple:

• Cigarette Lighter Adapter: Many small inverters come with a cigarette lighter adapter, allowing you to plug them directly into your vehicle’s lighter socket. However, remember that you can only draw 150 to 200 watts of power from the cigarette lighter socket.
• Battery Clamps: These small inverters often include cables that can be clamped directly to a battery, providing a straightforward connection.

If you plan to use your inverter through the cigarette lighter, ensure it’s rated at 450 watts or less.

Larger Inverters (500 Watts and Over):

For inverters rated at 500 watts or more, direct wiring to the battery is required:

• Direct Connection: Larger inverters must be hard-wired directly to the battery. Your specific cable size depends on the distance between the battery and the inverter. This information is provided in your inverter’s owner’s manual.
• Wire Selection: When connecting your inverter to the battery, use the thickest wire possible and keep the length as short as practical. This minimizes voltage drop and ensures efficient power delivery.

General Cable Size Recommendations:

Here’s a quick guide for choosing the right cable size based on inverter wattage and cable length:

Depending on the distance, these cable sizes ensure that your inverter can safely and efficiently draw the necessary power from the battery.

Note: The required cables may not be included with the inverter, so be sure to check your inverter’s specifications and purchase the appropriate wires if needed.