What size generator do I need for a 1500-square-foot house?

• <div><p>A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the <a href="https://www.angi.com/articles/how-many-watts-house.htm">total wattage</a> of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.</p></div>

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Q: What size generator do I need for a 2,500-square-foot house?

• <div><p>A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.</p></div>

Q: Do you have to turn off the main breaker when using a generator?

• <div><p>As a safety measure, you should always turn off the main breaker while operating your generator&rsquo;s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.</p></div>

Q: Can I use a generator to charge a back-up battery?

• <div><p>Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.</p></div>

Q: Can you plug a generator directly into your house?

• <div><p>No, this is extremely dangerous, often illegal, and you should never attempt it. If you connect your generator to your home without a transfer switch, the generated power can backfeed, essentially flowing back into the utility lines. Backfeeding exposes a significant threat of fatalities or harm to you and utility personnel, in addition to jeopardizing the structural integrity of your home.</p></div>

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Verified Reviews for Generator Install pros in Worland, WY

*The Angi rating for Generator Install companies in Worland, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Worland, WY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on October 23, 2025

Reviewed in October 2025
As the project completed before the snow season we had everything we had hoped for! Wonderful windows, efficient installation crew and financing ! Thank you RBA
Renewal by Andersen of Wyoming
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Reviewed in February 2018
Installation on time, professional. The windows are beautiful!
Renewal by Andersen
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Reviewed in November 2016
the installation went very well
BC Granite & Marble LLC
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Reviewed in November 2016
Everything went as planned. They communicated well, and even procured an additional rebate from the local utility, which other contractors did not mention. I was extremely pleased with the professionalism, communication, pricing and of course the install. Would highly recommend, and would use...
Hendrix Heating & Air Conditioning Ltd
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Reviewed in January 2015
Corey the installer was on time and very professional. He and Wade completed all the work in four hours and cleaned up well.
Poudre Valley Air
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Reviewed in November 2013
Service was good. Brad the owner was very responsive. We've only had one post-install issue and brad came out to fix it, no hassle. All the windows we looked at were made the same, these were just half the price.
Window World of Grand Island
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Reviewed in April 2013
Very good shop. I brought the car in during the morning and it was done in a few hours. General service is excellent. They are busy so it pays to have an appointment if you don't want to wait at the lube shop. They were very courteous and offered to take me home and pick me up. I would...
Laramie GM Auto Center
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Reviewed in September 2012
Trident Electric owner, Caleb Goodspeed, was extremely knowledgeable, experienced and efficient in both the inspection, and installation procedures. Very trustworthy and professional service. I would highly recommend this company without hesitation.
Trident Electric
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Reviewed in July 2012
Qualified installers, good work, took about the amount of time as promised, even though some difficulties were encountered professional work all the way.
Paramount Siding & Windows
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Reviewed in April 2012
They installed hardwood flooring in my beauty salon. They were excellent. They arrived on time. They did what I asked them to do. They cleaned up their mess. They were very personable.
Victors Flooring
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Find Generator install pros in Worland

My Classic Car Trader LLC

312 Prospect Ave

2.00(

)

My Classic Car Trader LLC

312 Prospect Ave

2.00(

)

53 years of experience

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Generator Install questions, answered by experts

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

No, this is extremely dangerous, often illegal, and you should never attempt it. If you connect your generator to your home without a transfer switch, the generated power can backfeed, essentially flowing back into the utility lines. Backfeeding exposes a significant threat of fatalities or harm to you and utility personnel, in addition to jeopardizing the structural integrity of your home.

The Worland, WY homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Alison Kasch
•
Feb 10, 2025Feb 10, 2025
How Much Does It Cost To Install a Generator Transfer Switch? [2025 Data]
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
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•
Aug 14, 2025Aug 14, 2025
How Much Does Whole-House Generator Maintenance Cost? [2025 Data]
Keeping on top of generator maintenance and repairs gives you extra peace of mind as a homeowner. Find out how much regular generator maintenance costs.
Elisa Greenberg
•
Aug 14, 2025Aug 14, 2025
How Much Does a Whole-House Generator Cost? [2025 Data]
The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
Tyler Lacoma
•
Mar 13, 2025Mar 13, 2025
Best Fuel For a Whole-House Generator: 5 Options
If you’re investing in a large power alternative for your home, it deserves the right fuel for your job. Here are the top options for a whole home generator.
Melissa Graham
•
Jul 23, 2024Jul 23, 2024
15 Generator Uses for Homeowners
A portable generator can serve several uses beyond its traditional purpose. If you’re looking for ways to put your generator to work, our guide can help.
Alison Kasch
•
Apr 4, 2025Apr 4, 2025
How Much Does It Cost to Run a Standby Generator?
How much does it cost to run a standby generator? The answer varies based on the type and size of the generator. Find out more.