*The Angi rating for Generator Install companies in Slinger, 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 Slinger, 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 February 24, 2026
Serving Slinger, WI and surrounding areas
Approved
In business since 1983
Emergency services offered
Warranties offered
"Everything went great. I think they did the best install they could to give me a quality job."
+9
Serving Slinger, WI and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"I cannot say enough great things about Jamie and the team at Wisconsin Generators LLC. From the very first conversation, Jamie was professional, knowledgeable, and incredibly responsive. He took the time to walk me through all my options, answered every question thoroughly, and made sure I felt confident in the decision we were making. The installation process was seamless. The crew showed up on time, worked efficiently, and treated our property with respect. Their attention to detail and commitment to doing the job right was obvious from start to finish. Everything was clean, organized, and completed exactly as promised. What really sets Jamie apart is his integrity and customer-first approach. There was no pressure just honest recommendations and clear communication. If you’re considering a standby generator, I highly recommend Jamie and Wisconsin Generators LLC. Reliable service, expert installation, and true peace of mind. Five stars all The way!!"
+1
Serving Slinger, WI and surrounding areas
Approved
Super Service Award Winner
In business since 2013
Free estimates
Small jobs welcome
"Joe was prompt, knowledgeable, friendly, and affordable. He replaced our main circuit breaker and got us back up and running quickly. I would recommend him to anybody!"
+13
Serving Slinger, WI and surrounding areas
Approved
In business since 2023
Emergency services offered
Credit card accepted
"Mike does great work for a reasonable price. He’s a great communicator, he’s timely, and he does exceptional work with quick turnaround. Mike installed six new lights in our dining room, having to cut and feed new electrical as it was not preexisting. He also installed new dimmer switches. The room is SO much lighter and brighter now. Additionally, he put in replacement lighting in our kitchen and hallway. He put down tarp to help avoid mess and swept and vacuumed up all the dust and particles after he was done. HIGHLY RECOMMEND!!!!"
+20
Serving Slinger, WI and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"When I had wall behind stove tiled - somehow wires were wrecked. Adam from CK came in - fixed those 3 outlets - added 2 more outlets - put new junction box in for new dishwasher-and install new hood range - so efficiently & fast & cleaned up whole area in less than 3 hours! Great price ! Highly recommend!! Mike & Dale are fantastic as well as they have done work at my home on previous occasions! TRIPLE AAA rating"
Serving Slinger, 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 Slinger, 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 Slinger, WI and surrounding areas
Approved
In business since 2013
Free estimates
Customers say: Quality work
"They are very responsive and administratively crisp in providing quotes and invoicing. They are always able to get me scheduled in the very near future. They arrive on-time and stay until the work is done. They showed great creativity and tenacity in putting in new wiring in our existing kitchen. They are licensed, bonded and did our work with the required permit. They made the permit inspection effortless and smooth. They provided great value for the money paid. I highly recommend them for any job you may have."
Serving Slinger, WI and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Credit card accepted
"Travis did an excellent job. He was efficient and explained everything to me in detail. I will definitely hire him again. Very pleased."
Serving Slinger, 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.
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.
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.
Learn how to find and hire a qualified generator repair pro. Get expert tips on vetting credentials, asking the right questions, and choosing the best technician.
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.
Having a back-up power source in case of emergency is important. Here’s how to use a generator to power your house.
