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TRUSTED BY ROCHESTER, MI HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon29
    Verified generator installs reviews

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

St. John Electric
4.9(
69
)
Fixed Generator - InstallPortable Generator - Install

Serving Rochester, MI and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"I would give Kevin and St. John Electric 10 stars if I could. He put in a fairly challenging outlet for me and also a second outlet for a freezer in the basement and did an excellent job. Very reasonable pricing. I will definitely be calling him in the future for a generator installation. I recommend him highly and without reservations."
Response time1 day
2 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for AG Electric, LLC
AG Electric, LLC
4.8(
23
)
Portable Generator - Install

Serving Rochester, MI and surrounding areas

Approved

In business since 2009

Free estimates

Customers say: Quick response

"We have had Andy do a couple of electrical projects for us. Reasonably priced. Quality Work. He tested running the generator and made sure the electrical systems in the house were running on the new generator after the electrical upgrade. Highly recommend."
Recommended by100%of homeowners
Avatar for Electrician Near Me LLC
Electrician Near Me LLC
5.0(
15
)
Generator - Install - For Business

Serving Rochester, MI and surrounding areas

Approved

Emergency services offered

Warranties offered

Small jobs welcome

"Andrew came to our house between Ann Arbor and Plymouth at 8 PM on Tuesday when a storm caused an electrical outage. We had a generator but we're only getting partial power in the house. Andrew ran tests inside the house, determining that not enough power was coming into the house. He then started testing different areas of the generator until he found the part not working. Once he located the problem, he quickly fixed it. Because he didn't give up on me or my problem, he restored electricity, saving me hundreds from food spoilage in a refrigerator and freezer. I don't think most electricians would have stuck with the problem or been able or willing to fix the generator. If I could give more than 5 stars, I would."
Service panels
Wholehouse Generator
New Panel
New construction
7 neighbors recently requested a quote
Avatar for Lighthouse Electrical Service
Lighthouse Electrical Service
4.6(
107
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Rochester, MI and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"We hired Lighthouse Electrical to install a generator interlock kit for our house and am very impressed at how smooth everything went. They were the cheapest out of 5 quotes, but didn't cut any corners. Corey came out on site for a quote which added comfort that he won't try to extra bill us once the work was to be done, and we got the install scheduled within a week from calling. Christian came out to do the install and once everything was complete he vacuumed up and walked me through how to use the switch. As a cherry on top, they didn't add a surcharge for paying by credit. I couldn't be happier with the experience."
Generac Generator
Panel Upgrade
EV Maintenance
Landscape Lights
Specialized Lighting

+4

Response time3 hrs
Response rate92%
2 neighbors recently requested a quote
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Showing 1-10 of 85
Generator Install FAQs, answered by experts

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

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.

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

The Rochester, MI homeowners’ guide to generator installs

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