*The Angi rating for Generator Install companies in Brookfield, WI 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 Brookfield, WI 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 October 08, 2025
Serving Brookfield, WI and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"They were able to come out at a time that worked for me. The installer was very friendly, did a great job and explained everything to me. Thanks again!"
+28
Serving Brookfield, WI and surrounding areas
Approved
In business since 2016
Free estimates
Credit card accepted
"Very pleased with quality, promptness following schedule, and care taken not to damage hosta plants in the construction area to install 18 kw whole home generator and transfer switch. The project went smoothly in spite of a one day rain delay. The generator and transfer switch were tested with a simulated loss of utility power and everything worked as expected - generator started and transfer switch allowed the generator to power the house automatically. When utility power was reenabled the transfer switch moved back to utility power position and the generator shut down. The price was fair and would certainly have no reservations to recommend them for any electrical work and would use them again."
Serving Brookfield, WI and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"The crew did an excellent job. Efficient and timely and the end result is perfect!"
+1
Serving Brookfield, WI and surrounding areas
Approved
In business since 1983
Emergency services offered
Credit card accepted
"Current Electric did great work installing a new outlet with dedicated circuit, four LED light fixtures and two new outlets in a home gym space we are building. They had some issue with scheduling during the initial visit and weren't able to install everything the day we had scheduled. Fortunately, they were flexible enough to do pre-wiring for us so we didn't have to delay installation of a wall materials and painting we were doing. They scheduled a trip back to finish things up a few days later. Appreciated their clear communications and ease of scheduling."
+2
Serving Brookfield, WI and surrounding areas
Approved
Super Service Award Winner
In business since 1996
Free estimates
Emergency services offered
"This is the first time I used Mr. Sparky, and they will definitely be my new go to electricians! I love that they are a small locally owned business! I called about a small non-urgent project, and they were able to come the same day, despite being backed up due to many local flooding issues. Kasey was extremely friendly and helpful on the phone and communication was excellent from start to finish. James showed up on time and was very sweet, yet professional, and my cats even loved him :) He was respectful of me and my property, and took care of my issue in no time. The price was very reasonable! I will definitely call them again, and would highly recommend!"
+50
Serving Brookfield, WI and surrounding areas
Approved
In business since 2016
Emergency services offered
Warranties offered
"Had them come out and install 2 ceiling fans very professional and fairly fast worked great and they cleaned up well after the install"
Serving Brookfield, WI and surrounding areas
Approved
In business since 1993
Free estimates
Warranties offered
"I found the service man to be very efficient. Very personable able to answer all my questions. He got ready to work and the electrical work made a difference between night and day. I would definitely recommend Horizon Electric."
+6
Serving Brookfield, WI and surrounding areas
Approved
In business since 2009
Free estimates
Warranties offered
"They are prompt, polite and accommodating. I will hire them again."
+8
Serving Brookfield, WI and surrounding areas
Approved (Corporate)
In business since 2025
Free estimates
Credit card accepted
"We need smoke alarm installed. Friendly, kind and knowledgeable."
Serving Brookfield, WI and surrounding areas
Approved
In business since 2002
Free estimates
Offers commercial services
"Jim was very fast at coming to evaluate what we all needed to have done. He did a great job and cleaned up after he was finished. While he was here we had an issue come up for another electrical problem and he ordered the part and came back as soon as he got the part. Will definitely hire him again when we need electrical work."
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.
