Get matched with top generator install pros in Algonquin, IL

Q: How big of a generator do I need for a transfer switch?

• <div><p>You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator&rsquo;s largest outlet is 30 amps, you&rsquo;ll need a 30-amp transfer switch.</p></div>

Q: What can I run on different generator sizes?

• <div><p>Here&rsquo;s what you can run with different wattages and types of generators:</p><p>Portable generator:</p><ul><li><p>2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. </p></li><li><p>4,000 watts will keep two large appliances operating and a few smaller devices.</p></li><li><p>8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.</p></li></ul><p>Partial to whole-house generator:</p><ul><li><p>20,000 watts and above will make it seem like your home&rsquo;s power is still on.</p></li></ul><p></p></div>

Q: Is it better to repair or replace a malfunctioning generator?

• <div><p>It&rsquo;s usually better to repair your generator if it isn&rsquo;t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around <b>$300</b> on average, while <a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">installing a new whole-house generator costs</a> around <b>$5,000 </b>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.</p></div>

Q: What size generator does my house need?

• <div><p>You can determine what size generator you need by listing the various appliances it will power during an outage. Write down the start-up watt usage, and then add them all together. </p><p>A 7,500-watt generator will run your refrigerator, freezer, well pump, and lighting circuits without a problem. However, you&rsquo;ll need an extra 3,000 to 4,500 watts to run your water heater and another 5,000 to 25,000 watts to run your electric furnace. In these instances, a whole-home generator is your best bet for running your critical equipment.</p></div>

Q: What is a remote start generator?

• <div><p>These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.</p></div>

Enter your zip and get matched with up to 5 pros

Verified Reviews for Generator Install pros in Algonquin, IL

*The Angi rating for Generator Install companies in Algonquin, IL 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 Algonquin, IL 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 January 17, 2026

Reviewed in November 2024
The guy worked hard to finish the job exactly as I wanted it. They did an excellent job of cleaning up after and finished as promised.
Mustang Carpentry, Inc.
Request a quote
Reviewed in November 2024
Great work, service, and post-sale support. They installed a 17kw whole house back-up generator about 6 years ago - still get top notch service, and the generator has been a life saver many times.
Mikus Electric & Generators, Inc.
Request a quote
Reviewed in September 2024
Nu-Again stayed true to their scheduling. The workmen were professional and courteous. No clean-up or debris left behind. I also had my deck refinished with lattice, stairs and railings. Everything matches perfectly. Any issues I did have with them was resolved quickly. The office staff is...
NuAgain Deck and Fence Renewal, Inc.
Request a quote
Reviewed in May 2024
Jeff is a pro! The Job was to wrap 4 windows and a door in aluminium that was left undone by a previous contractor. The workmanship is beautiful and I am very pleased with the turn out. I should have used Angi for this YEARS ago! Jeff is professional and his prices are very reasonable, You...
Select Siding Specialties
Request a quote
Reviewed in March 2024
We found Mighty Moving by a recommendation. After using the same moving company for over 10 years, we decided to give Mighty Moving a try. Excellent communication from both Mike and Robbie before the move and with follow up. Our crew (J.R., Ricky and Danny) were on time, friendly and provided a...
Mighty Moving, Inc.
Request a quote
Reviewed in January 2023
Very knowledgeable, professional and upfront about pricing. Great communication and arrived on time. Will be recommending to our friends and neighbors for sure!
PCS Appliance & HVAC Repairs
Request a quote
Reviewed in January 2022
Quick, efficient and kind. I was very pleased that they had a technician available the day of, just a couple of hours after my call. The technician successfully resolved the issue with my furnace.
G & R Heating and Air, LLC
Request a quote
Reviewed in September 2021
We had a power outage right before they got started, but thankfully I have a generator. They were very gracious about it and stayed until it was all completed. The power came back on just as they were getting ready to pack up!
Advantaclean of Northwest Chicagoland
Request a quote
Reviewed in February 2021
They were prompt, got the job done quickly and works very well, and I have any questions afterwards he will answer it right away, and knowledgeable.
CHUCK'S MECHANICAL
Request a quote
Reviewed in November 2019
Very thorough and knowledgable. Reasonable pricing. Will use for future generator service and maintenance.
JB Gen Service Company
Request a quote