*The Angi rating for Generator Install companies in Ennis, MT 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 Ennis, MT 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 February 18, 2026
Serving Ennis, MT and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"Just did not get connected as quickly as I did with the choice I made."
+3
Serving Ennis, MT and surrounding areas
Approved
In business since 1996
Free estimates
Small jobs welcome
Harness the power of nature and achieve energy independence with Independent Power, founded in Bozeman, Montana and providing the highest quality HVAC, solar and battery systems since 1996. Our team of experts designs and installs high-impact, durable heating & cooling, and solar energy systems, using cutting-edge technology. We can also integrate your system with battery storage, so you'll keep the lights on when the grid is down. Whether you're a homeowner, business owner, or organization, Independent Power can help you gain freedom from the traditional energy grid. We specialize in residential, commercial, and off-grid installations.
Serving Ennis, MT and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"Sebastian was top rate. On time, diagnosed issue, checked outlets & breakers. He had the right parts in the truck and was able to install new breakers (replacing the prone to fail AFI/GFI combo). Refrigerator is safe and the dishwasher/disposal is working again. Very happy with the great service and the on-the-job explanations that he had to help me be an educated customer. I will definitely use Sebastian on my coming up home improvement projects."
Serving Ennis, MT and surrounding areas
In business since 2020
Free estimates
Credit card accepted
"HE WAS A REAL GENTELMEN AND YOU COULD TELL HE KNEW WHAT HE WAS DOING, GREAT PERSON AND i WOULD TRUST HIM IN MY HOME TO WORK EVEN IF i WEREN'T HOME"
Serving Ennis, MT and surrounding areas
In business since 2024
Free estimates
Warranties offered
"Working with Brandon was amazing, he was incredibly prompt and professional with the small electrical issue I was having. I would highly recommend this company to any homeowner that feels just a little bit out of their depth."
Serving Ennis, MT and surrounding areas
In business since 2014
Emergency services offered
Small jobs welcome
"Jake was prompt and efficient! Will use their services again!"
+1
Serving Ennis, MT and surrounding areas
In business since 2010
Free estimates
Offers commercial services
"He does a great job and he's always here when we need him to be!"
Serving Ennis, MT and surrounding areas
In business since 2021
Free estimates
Emergency services offered
"We are so impressed with the outstanding service we received from Zero Dark Electric! From the almost instantaneous return call to the rewiring we needed done, (completed ASAP), Brandon did it right. We would definitely use Zero Dark again and will recommend them to anyone looking for an electrician."
Serving Ennis, MT and surrounding areas
In business since 1994
Free estimates
Credit card accepted
For all of your electrical needs, look no further! Give Eric Jacobs a call at Jacobs Electric, Inc., your one stop shop for all of your home and business needs. Customer satisfaction guaranteed! \n
Serving Ennis, MT and surrounding areas
In business since 2022
Free estimates
Credit card accepted
Here at C N T Customs, We Go Hard In The Paint.. We are family owned and operated with over 19 years of experience..Take great pride in our 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 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 client in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job we will treat your home or your business as we would treat our own. Give C N T Customs a call today. We look forward to working with you!
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.
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
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.
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Generators should give you peace of mind, but you’ll only get that if your installer knows what they’re doing. Learn how to hire a pro and what red flags to look for.
Whole home generator installations require a professional hand. Read this guide to help you decide which generator is best for your home.
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.
