What Size Generator Do I Need to Run a House?

A home standy generator installed outside on a concrete slab.

If you’re thinking about installing a whole-house generator, it’s not as simple as just picking any generator and calling it a day. You need to find the right size generator for your house to make sure it can handle your power needs during an outage. With so many options and factors to consider, it can be overwhelming to figure out where to start.

So, what size generator do you need to run a house, and how do you figure that out? In this blog, we’ll explore the ins and outs of whole-house generator sizing to help you make an informed decision.

Figuring Out Your Power Needs

What size generator do you need to run a house? Before you can determine the right size generator for your house, you need to understand your power needs. This involves knowing how much power your essential appliances and systems use. Here are some common household items and their approximate power requirements:

  • Refrigerator: 600 watts
  • Air Conditioner: 2000-4000 watts
  • Heater: 1500 watts
  • Lights: 60-100 watts per bulb
  • Television: 200 watts
  • Sump Pump: 1000 watts
  • Water Heater: 4500 watts

Add up the wattages of all the devices you need to power simultaneously during an outage. This will give you a rough idea of the total wattage your generator needs to provide.

Types of Generators

To determine what size generator is needed to run a house, it’s necessary to first consider your options. Standby and portable generators are two of the most notable types available on the market.

Standby generators, also known as whole-house generators, are permanently installed outside your home. They can automatically start during a power outage and provide enough power to run your entire house. They’re more expensive than portable and inverter generators but offer the convenience of uninterrupted power.

Calculating the Right Size Generator for Your House

As you can tell, there isn’t a universal generator size for every home. So, what size generator do you need to run a house? By following this whole-house generator sizing guide, you can find the perfect fit for your home.

Step 1: Determine Your Power Requirements

Make a list of the essential appliances and systems you need to power during an outage and their starting and running wattages. Remember, some appliances have higher starting wattages than running wattages.

Step 2: Add Up the Wattage

Add up the running wattages of all the items on your list. Then, add the highest starting wattage to this total. This will give you the total wattage you need from your generator.

Step 3: Choose a Generator With the Right Capacity

Generators are rated by their maximum wattage output. When looking at generator sizes, make sure the generator you choose can handle your total wattage needs. It’s better to choose a generator with a slightly higher capacity than your calculated needs to account for any additional power requirements.

Benefits of a Whole-House Generator

Whole-house generators offer several benefits over portable generators:

  • Reliable Power: A whole-house generator provides reliable power during an outage, allowing your essential appliances and systems to continue to operate.
  • Convenience: Whole-house generators are permanently installed and can automatically start during an outage. You don’t need to worry about manually starting the generator or refueling it during a prolonged outage.
  • Efficient Operation: Whole-house generators are designed to provide efficient operation, making them a cost-effective solution for long-term power outages.
  • Increased Home Value: Installing a whole-house generator can increase the value of your home, making it a worthwhile investment.

Choosing the Right Generator for Your Needs

Now that you have a better idea of what size generator is needed to run a house, it’s time to narrow down your search. Evaluate these important factors to select a generator that will benefit your family long-term.

Consider Your Location

If you live in an area prone to frequent power outages or extreme weather conditions, investing in a whole-house generator is a smart choice.

Think About Fuel Type

Generators can run on various fuel types, including natural gas, propane, and diesel. Consider the availability and cost of fuel in your area when choosing a generator.

Evaluate Noise Levels

If noise is a concern, look for generators with noise-reducing features. Standby and inverter generators are generally quieter than traditional portable generator models.

Assess Maintenance Requirements

Whole-house generators require regular maintenance to operate effectively. Consider the maintenance requirements and costs when choosing a generator.

Why Is Professional Installation Necessary?

Once you’ve chosen the right size generator for your house, it’s vital to have it installed by a professional. A licensed electrician will take great care to guarantee the generator is properly connected to your home’s electrical system and that a transfer switch is installed. This switch allows the backup generator to take over from the utility power during an outage, providing seamless power to your home.

RR Electric offers professional generator hookup services for the residents of Simi Valley, CA, and the surrounding areas. Our team can walk you through whole-house generator sizing and help you choose a solution that fits all your requirements.

Invest in a Generator Today!

Finding the right size generator for your house can seem like an arduous task, but it’s actually not too difficult. By following this whole-house generator sizing guide and consulting with generator experts like those at RR Electric, you’ll be well on your way to choosing the right generator for your home, keeping your family safe and comfortable during power outages.

Ready to get started? Contact RR Electric today to schedule your generator installation! Our expert electricians in Simi Valley look forward to assisting you.