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TRUSTED BY ADAMSTOWN, MD HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon13
    Verified generator installs reviews

Find Generator install pros in Adamstown

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

Serving Adamstown, 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
Recommended by94%of homeowners
Avatar for Rollins Repair
Rollins Repair
4.7(
56
)
Fixed Generator - RepairGenerator - Repair - For Business

Serving Adamstown, 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."
 Air Cooled Generator
 30KW Quitesoure
 Residential Installation
 20KW Air Cooled
 Another Residential Installation

+6

Response time9 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Ryan Electric
Ryan Electric
4.6(
10
)
Fixed Generator - Install

Serving Adamstown, MD and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

We are 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.

Project
Project
Project
66 neighbors recently requested a quote
Avatar for R&D Home Maintenace and Electrical Services
R&D Home Maintenace and Electrical Services
5.0(
2
)
Fixed Generator - InstallPortable Generator - Install

Serving Adamstown, MD and surrounding areas

Approved

In business since 2018

Credit card accepted

Customers say: Quick response

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Living room
Interior design
floor job
Bathroom flooring job
Exterior repairs

+127

Response time7 hrs
Response rate86%
2 neighbors recently requested a quote
Technician Engineers Group
3.7(
15
)
Generator - Install - For Business

Serving Adamstown, MD and surrounding areas

Approved

In business since 1996

Offers commercial services

Customers say: Quick response

"Anthony and his team do expert electrical work of all kinds. We are a 145 year old non-profit organization with buildings and grounds, and have contracted with Technician Engineers Group (TEG) on two large projects (and several small ones) over the last 15 years. One project rewired a large 125 year old building listed on the National Register of Historic Places, and one installed an extensive outdoor lighting system. In these two unusual situations TEG worked closely with us to find innovative solutions to our unique needs. We are very pleased with the results, enjoyed their can-do approach, and highly recommend this company for any electrical challenge. We found TEG reliable, honest, on time, and all the work was completed ahead of schedule."
4 neighbors recently requested a quote
Recommended by53%of homeowners
Avatar for Provident Electric
Provident Electric
4.9(
79
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Adamstown, MD and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Larry and his crew upgraded our under cabinet lighting with new LED lighting, and specialized outlet. Not only was our home and its contents treated as if they lived here, the job was done professionally. So much so, that the only issue we had was when the switch/outlet face plate screws came loose. I didn’t even bother calling Larry, I tightened them myself. The lighting is on, literally 24 hours per day since the install, with zero issues. Love these guys."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+28

Recommended by97%of homeowners
Avatar for Provident Electric, LLC
Provident Electric, LLC
4.8(
77
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Adamstown, MD and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"The salesperson made mistakes on the contract and sizing the portable generator (the number and size of transfer switch circuits were the limitation), However the owner acted immediately and we worked out an acceptable solution so the installation could proceed that day. The installers were on time, did everything they could to fix the problem, and did excellent work. I am confident the owner addressed the issues with the salesperson."
swimming pool install
swimming pool install
outdoor lighting
american hospital
american hospital

+46

Response time5 hrs
Recommended by97%of homeowners
Ritzau, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Adamstown, 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
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Showing 1-10 of 52
Generator Install questions, answered by experts

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

The Adamstown, MD homeowners’ guide to generator installs

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