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How To Choose the Best Generator Size for the Job

How To Choose the Best Generator Size for the Job
Generators come in varying voltage capacities. It is important for job requirements and safety purposes to choose the right voltage

If you’re working out on a construction job site, you might need a generator to get power to all of your tools and appliances. But even if you know you need a generator, you have to figure out what size generator you’re going to need. There are several different sizes of generators, and figuring out which one you need can be tricky. Here are a few tips for figuring out what size you’ll need.

Why It’s Important

You may think that the easiest thing to do is just to pick a generator and start using it to see if it works with your needs. However, doing some research and figuring out what size you will need before using a generator will save you from a lot of unnecessary problems. For example, if you use the right size generator, it will last longer and will run more smoothly. It won’t be prone to unexpected shutdowns or system failures because of a capacity overload. You and your team will also be much safer if you use the right generator for your job.


One of the first things that you’ll want to do to figure out what size generator you need is to figure out how much wattage you’ll need. Medium generators can power between 3,000 and 5,000 watts, large generators can power about 6,000 to 9,000 watts, and extra-large generators can power 10,000 watts and higher. You’ll want to add up the total wattage of everything that will be plugged into a generator and then, using the total amount of watts, you can start thinking about what size generator you’ll need.

It’s also important to note that some tools take more wattage to start than they do to run. When you check the watts required to run a tool, you should also check how many it takes to start the tool and add that to your total number of watts. It’s also a good idea to add 10 percent to the end total that you have calculated just to make sure that you know you have enough power in your generator.

Medium Generator

Once you figure out your total amount of wattage, you can start looking at different sizes of generators and know which one will work best for you. Medium generators can power about 3,000 and 5,000 watts – this may seem small, but it’s enough wattage to power a few emergency tools. It’s a popular choice for people who are looking to keep an emergency generator nearby in case of emergency because it can usually power a refrigerator, furnace fan, and a couple of other appliances. If you’re looking for a generator to have as a backup on a job, this might be a good option for you.

Large Generator

Large generators can power more because they can take between 6,000 and 9,000 watts. Many people choose large generators because they are capable of powering several different rooms in a home. For a construction job site where a lot of power tools are being used, this may be a good option. If you know that you’re going to be using at least 6,000 watts of power, you’ll want to look into getting a large generator so that all of your tools and appliances can be used at the same time.

Extra-Large Generator

An extra-large generator can power more than 10,000 watts of energy at a time. This means it could power a central air conditioning unit in a home, along with other home appliances like a refrigerator, pumping system, and electricity. If you’re working on a job where you know you’ll be using tools that require a lot of energy to use, you’ll probably want to look into getting an extra-large generator. And if you’re not positive how many watts you’ll be using, you might want to go a size bigger to be sure that you have enough power to complete your job.


If your tools require a huge amount of power, or if they need to be running 24/7, you may want to look into getting an industrial-sized generator. A lot of these are created for keeping huge corporations and businesses running in case of an emergency, and they are large enough to meet the power needs of your job.

If you’re working on a construction job site, you’re going to need power to run all of your appliances and tools, so having a generator will be crucial. Selecting which size generator to use can be difficult because there are many different sizes and different factors to each one. But by using these tips, you can be sure that you select the right generator size that will help you get your job done quickly and efficiently.

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