What Size Inverter Do I Need in a Semi Truck?

Semi-trucks are an integral part of the transportation industry, and they require a reliable power source to operate. When it comes to powering a semi-truck, an inverter is one of the most important components.

Inverters are used to convert direct current (DC) power from a battery source into alternating current (AC) power, which can then be used to run electrical appliances and devices in the truck. Choosing the right size inverter for your semi-truck is essential in order to ensure that your truck has enough power to run all of its electrical components.

When selecting an inverter for a semi-truck, it is important to consider the total wattage requirements of all of the electrical devices and appliances in the truck. This includes items such as air conditioning units, lights, televisions, computers and other electronic devices. To determine the total wattage requirements of all these items, you will need to consult the manual or specifications for each device or appliance.

Once you have determined the total wattage requirements of all the electrical devices and appliances in your semi-truck, you can then choose an inverter with a wattage rating that exceeds that total wattage requirement by at least 20%. This will ensure that your inverter can handle any sudden increases in demand on its power output. For example, if all of your appliances combined require 2,400 watts of power then you would need an inverter with a rating of at least 2,880 watts.

It is also important to consider how many outlets you need in your semi-truck when selecting an inverter. Most standard inverters come with two AC outlets but there are also models available with more outlets if needed. It is recommended that you choose an inverter with enough outlets for all of your appliances and devices so that you do not have to use extension cords or adapters.


In conclusion, when choosing an inverter for a semi-truck it is important to consider the total wattage requirements of all electrical devices and appliances in order to select one with a rating that exceeds this by at least 20%. Additionally, having enough AC outlets available on the inverter should also be taken into consideration when making this decision. By considering these factors when selecting an inverter size for your semi-truck, you can ensure that it has enough power available to run its various components without issue.

Photo of author

Karen Watkins