*The Angi rating for Generator Install companies in Lima, NY 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 Lima, NY 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 November 25, 2025
Serving Lima, NY and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1988
Free estimates
Emergency services offered
"We had a Cummins generator installed. Our installers were professional and knowledgeable. I highly recommend Anderson."
+62
Serving Lima, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2019
Free estimates
Emergency services offered
"Pretty straight forward. Establish size,generator. Installed in an afternoon. Work professional and neat."
+9
Serving Lima, NY and surrounding areas
Approved
In business since 1985
Free estimates
Warranties offered
"We have used Ellenwood Electric many times over the years and they are always fast, efficient, and do amazing work. There's not a better electrician and crew out there!!!"
Serving Lima, NY and surrounding areas
Approved
In business since 1999
Free estimates
Customers say: Super punctual
"Upon returning from Christmas vacation we found we had an electrical problem. It eventually caused the breaker to trip and we had no lights in the upper part of our house. It was a couple of days before New Years day and we did not expect to get an electrician until the following week. We were fortunate to find Ron Bonaccorso on Aggie. We called and spoke with Micky, his wife. She checked with Ron and they agreed to come on New Years eve. Micky works as Ron's assistant and together Ron quickly found and fixed the problem. My wife and I want to thank them for taking their time to come on New Years eve. she said"
Serving Lima, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Free estimates
Warranties offered
"Met with Marc is very good young man very professional, had a generator Outlet in Start Plaza Grounded Lyons put it in for reasonable prices for his work. Excellent job plan on hired him again to do other jobs."
+1
Serving Lima, NY and surrounding areas
Approved (Corporate)
In business since 1941
Free estimates
Emergency services offered
John Betlem Heating & Cooling is a 3rd generation company founded in 1941. They provide Residential HVAC, Electrical and Insulation Services to Rochester, NY and the surrounding towns. John?s slogan that still holds true today is to do ?whatever it takes? to satisfy customers.\n\nJohn Betlem is a premier family operated solutions provider, passionately committed to the health, safety, and comfort for all they serve.
Serving Lima, NY and surrounding areas
Approved
In business since 2025
Free estimates
Small jobs welcome
"Very thorough job done, Excellent quality work. Friendly and timely installation. Very positive experience."
Serving Lima, NY and surrounding areas
Approved
In business since 2001
Free estimates
Warranties offered
"Great installation, very efficient. I surely would recommend them."
+79
Serving Lima, NY and surrounding areas
Approved
In business since 1971
Free estimates
Emergency services offered
"Install man worked very HARD ON HOT METAL ROOFS & it was 6-7 hr job!!!"
+10
Serving Lima, NY and surrounding areas
Approved
In business since 2001
Free estimates
Emergency services offered
"Both the sales team and the installation crew were very professional"
+61
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.
Whole house generators are a power alternative that can deal with frequent blackouts and other problems. Here’s how they function.
Portable generators are handy for many reasons, but they require care to prevent fire, electrocution, and more. Stay safe with this guide on how to use a generator.
Natural gas generators can tap into existing gas lines so they never run out of fuel. Here’s how they work and how they’re used.
