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Avatar for GAC Services
GAC Services
4.8(
293
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install

Serving Landover, MD and surrounding areas

Approved (Corporate)

In business since 1970

Free estimates

Warranties offered

"I’m back again to write another stellar review for GAC. Last year they replaced our HVAC system; this year we circled back and had them install a home generator. This was a long and drawn out process due to the various approvals needed from Montgomery County as well as coordination with Washington Gas (which ended up not just being a simple sign off but necessitating an additional, expensive upgrade to the gas line from the street to our home). Nevertheless, GAC did a fantastic job shepherding this process over the 6+ months of waiting on stakeholders, and they were also maximally accommodating to our family’s significant constraints on time and availability (due to health concerns related to a medically fragile family member). A special kudos to Sandy M, GAC’s master electrician, who took it on personally to ensure we were taken care of all throughout this process, going above and beyond with phone calls, text messages, personal visits, etc. on behalf of my family, I want to thank GAC and am giving top marks across the board for this effort which was complex , lengthy, and ultimately successful."
Additional Photos
6 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Beltway Electric Services llc
Beltway Electric Services llc
4.5(
32
)
Fixed Generator - InstallPortable Generator - Install

Serving Landover, MD and surrounding areas

Approved

Super Service Award Winner

In business since 1983

Free estimates

Emergency services offered

"Outstanding service. I originally needed an electrician to determine why I lost power to ½ my house. What Jody uncovered was a defective circuit breaker and my main switches overheating and in the process of melting down. He was able to change out the panel and install new breakers immediately. I’m grateful for the prompt response by Gene and the professionalism of Jody and Brian."
Response time10 hrs
Response rate100%
5 neighbors recently requested a quote
Calvert Generator
New to Angi
Generator - Install - For Business

Serving Landover, MD and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

Calvert Generator is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.\n

Response time10 hrs
1 neighbors recently requested a quote
Ritzau, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Landover, MD and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"Ritzau Generators
10520 Ewell Avenue
Kensington, MD. 20985
301-580-4491
[email protected]
Patrick installed a home generator for us back in the spring 2013.  It has performed wonderfully as needed.
We had an issue with a leak from one of the gas pipes feeding the generator and Patrick responded immediately.
"
Recommended by100%of homeowners
Nothing But Panels, LLC
4.8(
246
)
Portable Generator - Install

Serving Landover, MD and surrounding areas

In business since 2016

Warranties offered

Credit card accepted

"Very professional company and very knowledgeable in answering questions. The company also went the extra mile as one of my fixtures needed for installation was broken when purchased. The company was very nice and waited very patiently as I went back to Lowe s to exchange the fixture. I am very happy with the installations and will definitely use Nothing But Panels LLC in the future."
200A amp upgrade
200A upgrade
Meter can relocation
Federal pacific panel
Whole house surge protector

+41

Response time6 hrs
Response rate92%
Recommended by99%of homeowners
Avatar for Paradise Construction
Paradise Construction
4.4(
173
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Landover, MD and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Awesome! I wanted to do a heavy-up at my new home. I shopped around and got quotes from several companies incl Tim. I chose Paradise because of the price, responsiveness, and professionalism that Tim conducted himself. The job called for significantly more work than expected because of my desire to eventually add a backup generator, Tim made sure that I would not need to reinvent the wheel later and installed the right equipment to meet my future needs. During the course of his work I decided to add several additional outlets and discovered a mis-wired light. He took care of all of the work in short order. Tim is officially my go-to electrician."
Recommended by85%of homeowners
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Generator Install questions, answered by experts

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

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. 

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

The Landover, MD homeowners’ guide to generator installs

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