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Top-Rated Generator install pros in Agency - Updated Nov 2026

Avatar for CUSTOM ELECTRICAL SERVICES MISSOURI, LLC
CUSTOM ELECTRICAL SERVICES MISSOURI, LLC
4.5(
95
)
Fixed Generator - Install

Serving Agency, MO and surrounding areas

Approved

In business since 2005

Credit card accepted

Offers commercial services

Custom Electrical Services, LLC, has been in business since 2005 with over 25 years of experience. We specialize in all your home improvement electrical needs, and guarantee you a job well done. All the way from electrical switches outlets and fixtures, to electrical panel upgrades, we are your guys. We strive to exceed the homeowners expectations each and every time, and get the job done the way you want it. We work in a timely fashion, and always pay attention to detail. Proudly Serving Clive and the surrounding areas. . Call today!

Work Vehicle
32 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Smart Power Services
Smart Power Services
4.3(
6
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Agency, 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!

Cummins Generator
Kohler 12 kW
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Midnight Sun
Midnight Sun
4.1(
73
)
Fixed Generator - Repair

Serving Agency, MO and surrounding areas

Approved

In business since 2015

Customers say: Quick response

"Midnight Sun did an excellent job installing my garage sub panel. They arrived right on time and went straight to work. While digging the trench they encountered a lot of large rocks. It truly took a major effort to complete. But they just put their heads down and got it done. It is great to see such a high work ethic in a young business man. I would defiantly hire Midnight Sun again. And will recommend them to anyone in the need of the services they provide."
Response time1 day
Recommended by96%of homeowners
Avatar for Exceptional Electric
Exceptional Electric
5.0(
9
)
Fixed Generator - InstallFixed Generator - Repair

Serving Agency, MO and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Jordan Blake from Exceptional Electric rocks! His communication prior to coming out was very thorough, and he was able to schedule us in two days. While he was onsite he found multiple items from years of DIY wiring, one major one. He clearly communicated al recommended changes to better match current code. As to the major item, he discovered the transformer was causing over-voltage delivery into our main! He had me call United Electric, and the linemen were out even before Jordan left – kudos to U.E. Cooperative – and replaced the transformer on the pole. All this for what started out as just putting a new 30A circuit in for a mini-split! Our mini-split is not yet on site, so we look forward to having Jordan back to the farm to complete the electrical plus a couple of the found issues next week. He is so knowledgeable. I highly recommend him. His sense of humor is also a delight, and my husband enjoyed learning and discussing many things with him. His prices are excellent."
Panel change out
Response time5 hrs
Response rate100%
14 neighbors recently requested a quote
Tri-State Water, Power & Air
New to Angi
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Agency, MO and surrounding areas

Approved (Corporate)

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.

Response time1 day
Response rate100%
61 neighbors recently requested a quote
Chappell Electric
New to Angi
Portable Generator - Install

Serving Agency, MO and surrounding areas

In business since 1997

Free estimates

Chappell Electric has a single mission: Complete Customer Satisfaction! We strongly believe in giving our customers the most for their money. So, we work with only the highest quality materials, experienced and professional craftsmen. We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience. This approach has set us apart and made us one of the leading electrical companies in Kansas City, MO.

All Current Electric, LLC
New to Angi
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Agency, MO and surrounding areas

In business since 1990

Free estimates

Credit card accepted

All Current Electric, LLC is highly skilled and has a reliable team of electricians that are committed to serving you in the most professional way. Customer service is #1. Our service trucks are fully stocked to handle all electrical projects big or small. If you are seeking local Kansas or Missouri fair pricing electrical services, give All Current Electric, LLC a call today.

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Generator Install FAQs, answered by experts

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.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

The Agency, MO homeowners’ guide to generator installs

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