How long does a whole-house generator last?

<div>When maintained properly, a whole-house generator can last up to 20 years. <a href="https://www.angi.com/articles/how-much-does-generator-repair-cost.htm">Costs to maintain and repair generators</a> vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible. </div>

How do I know what size generator I need?

<div>When <a href="https://www.angi.com/articles/what-size-generator-do-i-need.htm">choosing the right size generator</a> for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:<ul><li>Refrigerator: 600 watts</li><li>Large dehumidifier: 700 watts</li><li>Large window air conditioner: 1,400 watts</li><li>Water heater: 3,000 watts</li></ul>Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running. </div>

What can I run on different generator sizes?

<div>Here’s what you can run with different wattages and types of generators:Portable generator:<ul><li>2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. </li><li>4,000 watts will keep two large appliances operating and a few smaller devices.</li><li>8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.</li></ul>Partial to whole-house generator:<ul><li>20,000 watts and above will make it seem like your home’s power is still on.</li></ul></div>

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Q: How much does a whole-house generator cost?

<div><a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">Installing a whole-house generator costs</a> about $5,000 on average. Prices range from $1,550 to $8,500, depending on size, brand, fuel type, and assembly. The size of your whole-house generator is the most significant cost factor, with large homes with high energy demands costing the most to power. Types of whole-home generators include:<ul><li>Portable generators with 1kW&ndash;7.5kW capacity: $500&ndash;$2,000</li><li>Partial generators with 9kW&ndash;20kW capacity: $2,000&ndash;$6,300</li><li>Whole-house generators with 22kW&ndash;48kW: $5,000&ndash;$18,000</li></ul></div>

Q: What can I run on different generator sizes?

<div>Here&rsquo;s what you can run with different wattages and types of generators:Portable generator:<ul><li>2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. </li><li>4,000 watts will keep two large appliances operating and a few smaller devices.</li><li>8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.</li></ul>Partial to whole-house generator:<ul><li>20,000 watts and above will make it seem like your home&rsquo;s power is still on.</li></ul></div>

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Verified Reviews for Generator Installation pros in Farmington, UT

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

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

Last update on June 05, 2025

Reviewed in November 2023
Five star and I don’t give that rating often. Very professional and friendly at the right price. Zach the technician was on time and went out of his way to ensure the job was completed and done correctly. I also loved the text informing me that they would arrive in 30 minutes to the job site. I...
Mr Electric of Sandy
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Reviewed in November 2012
I was extremely pleased with the job that was done by Diamond Electric. Jason reviewed again with me all that I wanted done, and he then again explained what he needed to do. He recommended I install and additional conduit under the sidewalk for future landscape lighting. I expressed a concern...
Black Diamond Electric Plumbing Heating & Air
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Reviewed in April 2017
My lawn mower runs perfectly now, as did the snowblower when he cleaned the carburetor on it this winter. He was prompt, professional and a really nice guy. He's got my business for good!
Mobile Small Engine Medic Service & Repair
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Reviewed in May 2017
Purchase and delivery went outstanding, LCE coordinated delivery of equipment direct with customer and provided full start-up services and additional onsite customer training. As a customer, LCE pays their invoices promptly and well ahead of standard NET-30 Terms. Las Colinas Engineering is my...
Las Colinas Engineering
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Reviewed in June 2014
I took my Husqvarna chainsaw to Mower Medic on May 2 2014 to have it repaired. I was told at that time that they were so backed up with previous work that it would take at least 3 weeks before a technician would be able to even look at my chainsaw just to diagnose the reason that it wasn't...
Mower Medic
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