Get matched with top generator installers in O Fallon, MO
There are 3 highly-rated local generator installers.
Verified Reviews for Generator Installation pros in O Fallon, MO
*The Angi rating for Generator Installation companies in O Fallon, MO 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 O Fallon, MO 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 12, 2025
Generator installers in O Fallon
We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game. We provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.
"They initially contacted me via email ready to make a visit for the install. Said that they could do the project no problem. Then when they realized I wouldn’t be buying a generator from them, which I had TOLD them upfront, they canceled on me. That is not an acceptable way to do business. They should simply state that they only install generators that they sell and not waste my time."
James K on May 2025
We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game. We provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.
"They initially contacted me via email ready to make a visit for the install. Said that they could do the project no problem. Then when they realized I wouldn’t be buying a generator from them, which I had TOLD them upfront, they canceled on me. That is not an acceptable way to do business. They should simply state that they only install generators that they sell and not waste my time."
James K on May 2025
Licensed Electrical Contractor insured and bonded 7+ years of experience.Adept at obtaining permits, ensuring building code compliance. Perform and maintain a skill workman ship. A professional with a strong commitment to superior customer service coupled with first- rate communication skills that build significant customer trust and loyalty
"Perfect. DeAndre arrived on time and installed the laundry room outlet that we needed. I would recommend Thompson Electric."
Steve W on May 2025
Licensed Electrical Contractor insured and bonded 7+ years of experience.Adept at obtaining permits, ensuring building code compliance. Perform and maintain a skill workman ship. A professional with a strong commitment to superior customer service coupled with first- rate communication skills that build significant customer trust and loyalty
"Perfect. DeAndre arrived on time and installed the laundry room outlet that we needed. I would recommend Thompson Electric."
Steve W on May 2025
We are a 4.9 star rating on Home Advisor/Angie's List. Licensed and Union. We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction. We accept Check, Cash or Credit Cards
"It went great, I was selling my house and some electrical work was needed after the inspector flagged some things and closing date was coming quick. I got a hold of Jeff and he came to the house and said no problem we can take care of it. Very happy with the work that was done."
Tim W on February 2025
We are a 4.9 star rating on Home Advisor/Angie's List. Licensed and Union. We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction. We accept Check, Cash or Credit Cards
"It went great, I was selling my house and some electrical work was needed after the inspector flagged some things and closing date was coming quick. I got a hold of Jeff and he came to the house and said no problem we can take care of it. Very happy with the work that was done."
Tim W on February 2025
We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Mike is great, would recommend to anyone!"
Neil B on June 2024
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Mike is great, would recommend to anyone!"
Neil B on June 2024
Rebecca's Services is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.
"Joe from Rebeccaâ s Handyman Services was able to come out the same day I called about removing old, cracking caulk around my garage door. Price was very reasonable and he did a great job, and made sure to clean up the area afterwards. Iâ ll be using him again for other â honey-doâ items in the near future."
Shirley R on August 2022
Rebecca's Services is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.
"Joe from Rebeccaâ s Handyman Services was able to come out the same day I called about removing old, cracking caulk around my garage door. Price was very reasonable and he did a great job, and made sure to clean up the area afterwards. Iâ ll be using him again for other â honey-doâ items in the near future."
Shirley R on August 2022
We are extremely passionate about the work that we do. You can depend on us to provide a high quality service at a fair and honest price. We understand that the future of our business depends upon our reputation and that is why customer service is by far our highest priority. If you are looking for a professional you can trust, please call today to schedule a no-obligation estimate!
We are extremely passionate about the work that we do. You can depend on us to provide a high quality service at a fair and honest price. We understand that the future of our business depends upon our reputation and that is why customer service is by far our highest priority. If you are looking for a professional you can trust, please call today to schedule a no-obligation estimate!
Welcome to Cruse Construction, LLC, we take pride in the quality of work and customer satisfaction that we give each customer. We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you.
"The service technician was courteous, and put care into my project. If you want a job done righ, I would recommend this company."
James H on March 2019
Welcome to Cruse Construction, LLC, we take pride in the quality of work and customer satisfaction that we give each customer. We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you.
"The service technician was courteous, and put care into my project. If you want a job done righ, I would recommend this company."
James H on March 2019
Nightscapes Outdoor Lighting is proud to be a locally owned and operated business that has been serving the community since 2004. With years of experience and unmatched expertise we can help with any and all of your residential and commercial exterior lighting needs. From landscapes to parking lots, security to holidays we have a lighting solution for you. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. We will work with you on discovering exactly what you are wanting to accomplish and communicate through the process of making that a reality. Let us show you the Nightscapes Outdoor Lighting difference, get in touch today!
"Fred is great and did the job quickly, professionally, and the outcome is superb"
Mike K on December 2023
Nightscapes Outdoor Lighting is proud to be a locally owned and operated business that has been serving the community since 2004. With years of experience and unmatched expertise we can help with any and all of your residential and commercial exterior lighting needs. From landscapes to parking lots, security to holidays we have a lighting solution for you. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. We will work with you on discovering exactly what you are wanting to accomplish and communicate through the process of making that a reality. Let us show you the Nightscapes Outdoor Lighting difference, get in touch today!
"Fred is great and did the job quickly, professionally, and the outcome is superb"
Mike K on December 2023
Where Highest Quality Meets Lowest Price! We offer over 18 years experience in the low-voltage Industry. We've established a solid reputation in security projects, home automation, home theater, TV installation and access points, phone and data communications for large executive homes, corporations, and residential homes across the country. We are licensed in both the city and the county. Were committed to providing a personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.
"This company is absolutely fantastic! Tony is so professional and a really great guy. He bid me a price for some work that turned out to be much more complicated than originally thought. He did not try and increase his price and did the work for the pre-determined rate. In addition, I had a tv he was supposed to hang that was brand new in the box. When he opened it, he discovered the screen was shattered. I was able to return the tv and he is coming back out on a separate trip to hang it. He has really gone above and beyond. I cannot recommend him more highly."
Dan M on December 2019
Where Highest Quality Meets Lowest Price! We offer over 18 years experience in the low-voltage Industry. We've established a solid reputation in security projects, home automation, home theater, TV installation and access points, phone and data communications for large executive homes, corporations, and residential homes across the country. We are licensed in both the city and the county. Were committed to providing a personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.
"This company is absolutely fantastic! Tony is so professional and a really great guy. He bid me a price for some work that turned out to be much more complicated than originally thought. He did not try and increase his price and did the work for the pre-determined rate. In addition, I had a tv he was supposed to hang that was brand new in the box. When he opened it, he discovered the screen was shattered. I was able to return the tv and he is coming back out on a separate trip to hang it. He has really gone above and beyond. I cannot recommend him more highly."
Dan M on December 2019
FAQs for generator installation projects in O Fallon, MO
Installing a whole-house generator costs 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:
Portable generators with 1kW–7.5kW capacity: $500–$2,000
Partial generators with 9kW–20kW capacity: $2,000–$6,300
Whole-house generators with 22kW–48kW: $5,000–$18,000
When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators 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.
When choosing the right size generator 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:
Refrigerator: 600 watts
Large dehumidifier: 700 watts
Large window air conditioner: 1,400 watts
Water heater: 3,000 watts
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.
Here’s what you can run with different wattages and types of generators:
Portable generator:
2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers.
4,000 watts will keep two large appliances operating and a few smaller devices.
8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.
Partial to whole-house generator:
20,000 watts and above will make it seem like your home’s power is still on.
The value of installing a whole-house generator is that your home has guaranteed power, even if the power grid in your area is down. Whether a whole-house generator is worth installing in your home depends on how often you use it, your home’s location, and your lifestyle. For example, installing a whole-house generator is likely worth it if you:
Experience frequent or prolonged power outages
Work from home
Store a lot of cold food
Have a sump pump
Have a pump for well water
Use electronic medical devices
Live in a climate requiring heating or cooling
- Dardenne Prairie
- Lake Saint Louis
- Saint Paul
- Wentzville
- Cottleville
- Weldon Spring
- New Melle
- Saint Peters
- Foristell
- Old Monroe
- Saint Charles
- Moscow Mills
- Chesterfield
- Winfield
- Town And Country
- Wright City
- Augusta
- Glencoe
- Ellisville
- Wildwood
- Maryland Heights
- Troy
- Ballwin
- Bridgeton
- Creve Coeur
- Foley
- Hazelwood
- Labadie
- Manchester
- Pacific
Get our Angi-powered app
