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    Verified generator installs reviews

Top-Rated Generator install pros in Cheltenham - Updated Nov 2026

Technician Engineers Group
3.7(
15
)
Generator - Install - For Business

Serving Cheltenham, 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
Calvert Generator
New to Angi
Generator - Install - For Business

Serving Cheltenham, 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
Avatar for Ethridge Electric & Generator Services
Ethridge Electric & Generator Services
4.8(
33
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Repair - For Business

Serving Cheltenham, MD and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"Ron Ethridge has been our Electrician of chose for the past three years. I started out using Ron to service my generator after the warranty lapsed. Heâ  s provided that big company expertise with that small organization connection. Since that time Ron and his team have provided electrical services for our entire home. I feel comfortable leaving Ron in our home while weâ  re away which is a huge feat for me particularly. Iâ  m grateful for the service that Ron and his team continues to provide to our family."
Panel Change/Heavy Up
Panel Change/Heavy Up
Panel Change/Heavy Up
Recessed Lighting
Recessed Lighting

+1

Response time2 hrs
Recommended by100%of homeowners
Ritzau, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Cheltenham, MD and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"Patrick, who supervised the installation of a generator which I had, also worked up the initial recommendations and estimate. This generator was used, but that did not deter Patrick from coming up with a plan. Other contractors sent estimators who were more sales people than experienced generator contractors. Only Ritzau made the recommendation to replace the old fashioned transfer switch which came with the unit with an up to date digital transfer switch. This
"
Recommended by100%of homeowners
Nothing But Panels, LLC
4.8(
246
)
Portable Generator - Install

Serving Cheltenham, MD and surrounding areas

In business since 2016

Warranties offered

Credit card accepted

"Anthony was great. He installed two new breakers for a washer/dryer I had installed in the basement. He also install outside motion lights and changed a single outlet to a double. He is very professional and explain everything before he started the work. He communicated well with us. I highly recommend this company."
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 Cheltenham, MD and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"EXCELLENT!!! Based on other reviews, I reached out to Paradise to troubleshoot an issue with flickering lights. I was shocked when Tim offered to troubleshoot the issue for free, despite estimating it could take 1.5-2 hours. Tim was prompt (even called to let me know he was running a few minutes late), wore a mask (COVID), was courteous, and determined the issue really quickly. He entertained answering all of my electrical questions, came up with the best path forward to resolving the issue, and provided a very reasonable quote for repairs. I will definitely be having him complete the recommended repairs! It is hard to find tradespeople like Tim in DC; available, knowledgeable, friendly, and, most importantly, a professional who takes pride in his work. If you have a need for an electrician, you must call Paradise Construction."
Recommended by85%of homeowners
Avatar for BGE Home
BGE Home
4.6(
1,327
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Cheltenham, MD and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"We needed our water heater replaced. It was somewhat complicated because we wanted to upgrade the tank in size, but we had limited room for it. There was some back and forth in finding the appropriate tank, but the salesperson and technicians were very pleasant to work with throughout the whole process. When the pipes were moved and the tank was installed, it was done efficiently and professionally. We are very happy with our experience and the final product."
Recommended by94%of homeowners
Avatar for Argent Heating And Cooling LLC
Argent Heating And Cooling LLC
4.3(
706
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Cheltenham, MD and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Argent sent a great team of three highly skilled technicians to install our new HVAC System. They met some obstacles with our old system versus installation of the new one but easily overcame them and produced a great installation. They were courteous, friendly, helpful and they got the job done expertly."
Recommended by87%of homeowners
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Generator Install FAQs, answered by experts

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

Potential benefits of using a natural gas generator include reducing your carbon footprint, lower likelihood of carbon monoxide exposure, budget-friendly operating costs, and low-maintenance, continuous fuel supply. Some possible drawbacks, though, include higher initial installation costs, dependency on a natural gas supply, and installation complexity. Keep in mind that pros and cons will vary based on the type and brand of natural gas generator. 

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

The Cheltenham, MD homeowners’ guide to generator installs

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