How Many Amps Does a Garage Door Opener Use? Answered by Expert

Those who have garage opener doors often wonder about the energy consumption of the same. If you are setting up a garage door opener or going to buy one, it is important to know how many amps does a garage door opener use.  

How Many Amps Does a Garage Door Opener Use?
How Many Amps Does a Garage Door Opener Use?

How Many Amps Does a Garage Door Opener Use?

It’s advisable to check the manual; a single garage door opener often requires 15 amps, while a bigger door will require 20 amps.

Most modern garage doors need 3-5 ps depending on the type of lighting used. In case the opener has 200-watt lighting, the light will need more amps than the overall energy requirement of the door will increase.

Do garage doors require a specific or dedicated circuit? 

No, your garage door opener does not require a specific circuit. However, you cannot plug it into any electrical outlet using an extension cord. You will thus need a new outlet. 

What size breaker will you need for a ½ hp garage door? 

Ideally, a 7 amp is ideal for a ½ door. 

Is a garage door opener extremely powerful? 

Is a garage door opener extremely powerful? 
Is a garage door opener extremely powerful? 

Though garage doors have horsepower, it does not impact the opener’s power. Most garage openers in the market have varied horsepower; however, it’s essential to know that it’s a marketing gimmick. The openers are not highly powerful for standard doors, as a rule of thumb. 

Should you plug your garage door opener into an extension cord? 

Though many people do this, the consequences of such an arrangement can be dangerous, and thus all door opener manufacturers advise against it. If you are using extension cords, make sure it’s only for temporary use. 

How is a ¾ hp garage door opener different from a ½ hp? 

A ½ hp garage door opener can take up to 300 pounds without impacting the motor. On the flip side a ¾  hp door opener takes about 600 lbs. However, it’s available to take a ¾ p option only if your door is too heavy or big; it’s an option that works best for double doors. 

What are phantom loads? 

Phantom load is simply some amount of power that some appliances consume when they are not in use. Though the amount of this consumption is lower, the latent consumption adds up over the years.

How do phantom loads work? 

Everything that has a remote control (including your door opener) must stay active to respond to your command, and staying active requires power. Though you may have turned off the switch, that does not turn off the gadget; you need to unplug it from the wall for it to be non-operative. 

Though latent power consumption does not seem to take a lot, studies have shown that approximately $3  billion is spent on latent power consumption annually. 

How much energy does your garage door opener use on standby? 

This amount of energy your garage door opener takes on standby depends on the make and model. After testing multiple models, the annual energy consumption stood between 15.8 kWh to 127.0 kWh – or $2 to $16 per year.

How much energy does your garage door opener use on standby? 
How much energy does your garage door opener use on standby? 

In absolute terms, a high-end door opener will definitely burn more energy than a premium-quality high-end entertainment unit. A high-energy door can consume two times more energy than a video game console. 

Can you cut down on the energy consumption of high-end garage doors? 

Many newer models have been launched in the market that is designed to cut back the standby energy consumption of garage door openers. Some have successfully brought down the energy consumption from 5 watts to 1 watt. 

What to do if there is a power failure? 

In case of a power failure, your garage door opener will stop working. Of course, you cannot leave your car on the street or inside a dark, powerless garage. To avoid such a situation, your automatic door must have an unlocking device that will let you lock and unlock the door manually.

Most people have the unlocking option operating from within the garage. However, if your garage does not have a side door, use an additional unlocking option at the door leaf that you can secure with a lock. 

Should you have a battery backup for your garage door opener?

If you have a battery backup, there should be no issue with your garage door opener in case of a power failure. These are ideal when it’s impossible to set up a clean and clear connection with the primary power source.

Depending on the consumption, you need to change the battery once a month. If you will be using the battery-operated option primarily, it’s advisable to have a second battery backup. You can also opt for clean energy and use smart power strips powered by solar panels. 

Advantages and disadvantages of garage door opener


One of the primary benefits of an electric garage door opener is the ease of use. That means you need not leave your car to operate with the door. You can also connect your garage door with your smart home setup if you have it. 


One of the disadvantages of setting up an electric garage door opener system is the expensive installation process. The whole motorization system is highly expensive, and you will need to appoint a professional to do it, which further increases the cost. Besides, the energy consumption will also add to your growing bill. 


Though it is an expensive setup, many people these days are opting for electric garage door openers, and if you are planning on taking that route, this article should help you in your path.