*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
"Could not have asked for better service. The recommended product is working great, the installers were professional and so far the service technicians are top notch."
Serving Damascus, MD and surrounding areas
Approved
In business since 2004
Free estimates
Credit card accepted
"He found an electrical problem that Potomac Edison arrived to do a emergency repair. It was a fire hazard. So thankful he found the problem and did an excellent install with our Generator."
+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
"Kevin Williams was prompt and professional. He accommodated a last minute appointment for me when the electrician I normally use was unavailable. He called ahead to let me know when he would arrive, and even offered to arrive earlier if I wanted. He was knowledgeable, professional, and courteous. He was also very reasonably priced. I am glad I found him and plan to use his services again in the future."
+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
"I needed a dedicated 20amp circuit and outside outlet installed to my patio. Maitiai arrived on time, was friendly/professional, and completed the agreed upon work. He filed for the appropriate permit with the City of Frederick, and helped schedule the inspection which passed without issue. I would have no hesitation contracting with him again in the future."
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.
The cost to install a whole-house generator in Baltimore, MD varies based on factors like generator size, fuel type, and installation complexity. Learn the typical price range and what influences your total cost.
The cost to install a whole-house generator in Washington, DC varies based on factors like generator size, fuel type, and installation complexity. Learn the typical price range and what influences your total cost.
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.
Depending on your needs, many types of generators can power your home, RV, or campsite. Check out our guide for the best types of generators.
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.
Before deciding between a gas generator and a natural gas generator, explore the differences. Compare gas vs. natural gas generator with our informative guide.
