*The Angi rating for Generator Install companies in Damascus, MD 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 Damascus, MD 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 20, 2025
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Customers say: Quality work
"Expert whole house generator Installation at a good price."
Serving Damascus, MD and surrounding areas
Approved (Corporate)
In business since 1970
Free estimates
Warranties offered
"The process from beginning to end was highly professional, technically very competent and complete, and the installation was impressive (Team of about nine people, all worked efficiently and simultaneously outside and inside my house. The job was done in a little over half a day. Very happy with my decision to hire GAC to spec, supply, and install the system."
Serving Damascus, MD and surrounding areas
Approved
In business since 2004
Free estimates
Credit card accepted
"Our existing generator died. James diagnosed the problem and gave us a few options to repair or replace it. We chose to replace it. James handled everything, from getting and installing the new generator to electrical and fuel (propane) connections. We have asked him to schedule us for the annual maintenance on the machine. We are pleased, though we haven't lost power since it was installed, LOL."
+6
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Emergency services offered
"Installation went very well, workers where very kind and friendly!"
+9
Serving Damascus, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"On June 10, I had a company to install security equipment in my home. In doing so, the installer drilled through a wire and I did not have electricity in several outlets due to the damage. Since the company did not have an electrician on staff and was unable to refer me to anyone, I turned to Angie’s List for help in finding someone to correct the problem. I called Hands on Electric on June 11 and spoke to the owner, Kevin Williams. I explained my problem to Mr. Williams and he gave me a window of time in which he would be able to come out. Not only was he able to come out the same day that I called, but Mr. Williams was able to come much earlier than expected. Once he arrived he was able to trouble shoot and diagnose the problem. Mr. Williams was very, very friendly, professional and honest. He was able to answer my husband’s questions and explained what he was doing as he made the repairs. My husband was very happy about that and we were both impressed by the years of experience Mr. Williams had for his age. I have been looking for an electrician for a while now and have decided that I will be using Hands on Electric for all of my future projects. I was very pleased with the work that was done by Mr. Williams and will recommend him to my friends and family when they need of electrical services."
+6
Serving Damascus, MD and surrounding areas
Approved
In business since 1925
Free estimates
Emergency services offered
"Very responsive, extremely knowledgeable, excellent problem solvers. They kind of really solved the mystery of why the generator didn't work that had to do with the electric."
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 1980
Free estimates
Warranties offered
"IVO, the installer, was and continues to be the most perfect person to do the job!"
+1
Serving Damascus, MD and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Your technician that came out to do a yearly maintenance inspection on my generator was very nice and knowledgeable. He arrived actually earlier than expected and went right to work. I would recommend your company to anyone and it was so nice to deal with someone who acted like they enjoyed their work and wanted to please. Thank you!"
+8
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Warranties offered
Customers say: True professional
"Everything great, they did and Amazing job they were very professional! I would definitely recommend to anyone doing electrical work."
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Free estimates
Emergency services offered
"Friendly. Answers phone calls immediately. Antonio called the day of the service to confirm appointment. He arrived on time. Installed 2 ceiling fans in a timely manner. Cost- effective. I would recommend and hire again"
+25
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.
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