*The Angi rating for Generator Install companies in Raymore, MO 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 Raymore, MO 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 December 18, 2025
Serving Raymore, MO and surrounding areas
Approved
In business since 2020
Free estimates
Credit card accepted
"Electrician was very pleasant to work with and had no problem when i asked about installing an extra outlet."
Serving Raymore, MO and surrounding areas
Approved
In business since 1995
Warranties offered
Small jobs welcome
"Showed up on time. were friendly knowledgeable and professional. They explained the whole operation of the standby generator clearly. I would recommend them highly."
+12
Serving Raymore, MO and surrounding areas
Approved (Corporate)
In business since 1951
Free estimates
Emergency services offered
"Every interaction with the company was great. Biff or advisor was very friendly and presented us with the best options that fit our budget. No up selling or pressure. Our installation technicians Daniel and Tony were incredibly friendly, efficient, and fast. They installed our whole system in four hours. The installation was the best I have scene in the four homes I have owned. They go above and beyond paying attention to the most minute of details. Anthony's was recommended to me by multiple coworkers and friends. In the future, I will do the same."
+38
Serving Raymore, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"Raul is awesome! Couldn't have asked for a better electrician to work on my projects. He is an expert and has a great work ethic. He installed a chandelier, light switch, and neon sign above my fireplace. He also rerouted wires in my guest bathroom and installed a vanity light. He also added three outlets in the house. Great work all around. I would definitely recommend him for anyone that needs electric work done."
Serving Raymore, MO and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"Daniel arrived on time and had the perfect solution for my needs. He installed multiple outlets and guided me through the process. We had a terrific conversation and completed the project precisely as we had discussed. We also talked about installations that Mister Sparky could provide for my future home. I appreciate Daniel's work, time and conversation. Thank you Daniel!"
+3
Serving Raymore, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Warranties offered
Small jobs welcome
"Brian was thorough, made suggestions and recommendations. Installed 220 outlet."
+7
Serving Raymore, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Free estimates
Emergency services offered
"Installers were professional and thorough. Everything was explained to me, patiently (I ask a lot of questions)."
Serving Raymore, MO and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
We are a small business based in Lee's Summit, MO. Our goal is to cultivate long lasting relationships with all our clients. Above all, we value honesty and integrity in the way we do business. We do it all: Standby Generators - maintenance and repairs, installations, residential/commercial/industrial Residential - service repairs, panel upgrades, EV chargers, remodels, and new construction. Commercial/Industrial - service repairs, electrical additions, remodels, and new construction. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward working with you!
Serving Raymore, MO and surrounding areas
Approved (Corporate)
In business since 1950
Emergency services offered
Warranties offered
"I had Hamilton install a whole house generator. Very professional and great work and communication from them. They were also very reasonably price compared to some other quotes I received."
Serving Raymore, MO and surrounding areas
Approved
In business since 1971
Free estimates
Emergency services offered
"Jim for Donhohues Lightning Rods installed the lightning rod system in my home. When the work was done I was very happy as their installer came as per promised time, and perform the work. Before giving them the work Jim completely sold me their work ethics, quality, and service. There was a minor issue and his team took complete ownership of this issue and talked to me in detail. They provide a very good explanation to satisfy me. I am a happy customer."
+10
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.
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 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
From average costs to expert advice, get all the answers you need to get your job done.
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