# How To Calculate Generator Capacity

How much power does a generator need?What is the power capacity of a generator? This is the trickiest question that many people ask when they require emergency power and then they search for all generator info. The answer to this tough but important question depends on what needs to be powered in an emergency. To calculate the capacity, you will need to know how much power each appliance or device draws and then add them up. In this blog post will discuss how to calculate your generator’s maximum output so that you can make sure it has enough juice for all your appliances!

**Calculation of Generator Capacity**

**Calculate your load**

Calculate the power requirements for your home: The first step to calculate the power capacity of a generator is to calculate the power requirements of your home. This will help you determine if you have enough power for all of your appliances and devices. If you would like, you can use this worksheet to help you calculate the number.

The first column is called “**Capacity**.” This column is where you list how many amps a device draws per hour or a device’s wattage per hour. For example, a 12 amp appliance that draws 10 amps per hour has 40 watts in it. This is not an accurate usage measurement because an average load will be somewhere between 8-12 amps depending on the device. The average U.S. household uses about 30-40 kWh per day, and appliances will use anywhere from 20 to 32 percent of that (about 25 kWh). If we assume a conservative amount of usage for all devices at 20% each gives us:

Appliances = 750 watts x .25 = 187

**Determine the amount of time you need power**

If you need power for a limited time, it may be best to use a solar or hand-powered generator. If you have a more extended power outage in mind, gas generators are the better option. But how long will your emergency power solution last?

How much fuel will it take? This is a tricky question to answer in a single word because it depends on what type of generator you have and how much power you have in it. For this reason, we recommend calculating the number of days that your generator can run on one tank of gas.

**Find out how much power is available from your generator.**

Once you know the power requirements of your home and how long you need power, find out how much power is available from your generator. You can measure power in watts, kilowatts, or kilowatt-hours. It’s important to know this to determine how long you can run on one tank of gas.

**Calculate how much fuel you have left after each use and add that amount into your calculations as well**

After calculating how much fuel you have left after each use, compare that number with what you need. If the generator can’t keep up, it may be time to invest in a bigger generator. Most generators come with an hours-of-use meter to help you know when your generator will need refueling.

**Compare the number of watts generated by the generator to your load**

Compare the number of watts generated by the generator to your load: Now that you know how long your generator can run with one tank, compare this number to the amount of electricity (in watts) that your home and appliances will use.

**Add up all of your numbers.**

Now you have to add up all of the numbers you obtained in this process and see what it comes up to. If you have a generator with 1000 watts, but it takes 20 hours for your appliances to use 1000 watts, then it should last 7 hours on one tank. However, if your generator has an efficiency rate of 10%, that’s only 100 watts per hour, meaning you will run it for 14 hours on one tank. Either way, if you have a larger home or more appliances, it will be easier to choose another generator with a higher capacity.

**Some Tips:**

**#1**Choose a larger (or smaller) generator for more (or less) capacity, respectively.

**#2 **To get the most out of a generator, you need to research what your power needs are. You need to know that how many watts your appliances consume per hour and how many hours you will need power at a given time.

**#3**When comparing different generators, it is crucial to make sure they bill with the same unit of measure. For example, you will want a generator that generates in watts rather than a generator with a gas tank size in gallons.

**#4**Some generators have a fuel efficiency rating which may be something to consider as well. The more efficient the generator, the longer it will last on one kilowatt-hour of fuel.

**#5**You might also want to consider either you need a portable or a stationary power. A static generator will be more expensive but is much more powerful than a portable generator and can produce as many as 5000 watts or even more! Portable generators are also suitable for outdoor activities such as tailgating that may not have access to electricity.

**Final Verdict:**

Either you need an expensive generator or a bst generator under $1000To get the most out of a generator, you need to research what your power needs are. You must know that how many watts your appliances consume per hour and how many hours you will need power at a given time. When comparing different generators, it is essential to make sure they bill with the same unit of measure. For example, compare in watts rather than gallons or kilowatt-hours. Some generators have a fuel efficiency rating, which may be considered when purchasing one because more efficient ones can run longer between refueling times!

This blog post is all about the math side of generators. We’ve given you a few formulas and calculations to help you figure out how long your generator will last on one tank of gas, as well as what size it should be for your needs. The numbers might seem complicated at first glance, but they can help you make an informed decision when choosing which generator to buy! Have we answered any questions that have been nagging at you? If not, we’re here 24/7 to answer them anytime- give us a call or shoot over an email, and we’ll get back to you ASAP.