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Green's Electric
5.0(
24
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Greenbelt, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"It went very well. They were very courteous and cleaned up after themselves. They were respectful of my space and of me while working in my home. They did a walk-through before hand to make sure we were on the same page with everything and then did another walk-through at the end to make sure everything was done and correct. This is the first time I've dealt with an electrician and I was very impressed, I will use him again in future if we have any electrical problems."
Response time1 day
Response rate100%
36 neighbors recently requested a quote
Avatar for Bailey & Shipp Electric
Bailey & Shipp Electric
4.1(
82
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Greenbelt, MD and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"On both appointments, the technicians (David the first time, Matt & Evan the second time) were respectful and honest, very well organized. And they arrived right on time. We had ceiling fans and recessed lighting installed. They kept the work areas clean. -Frank K., City of Gambrills. My wife and I are very happy with their work, and the jobs were completed in the quoted time, even early! Everything was well explained and questions were answered with the feeling that they weren't in a rush to leave until I was satisfied. We will call again for future jobs."
3 recessed lights
Single Recessed Light
Custom Bathroom Wiring
chandelier
Panel Replacement After

+8

Response time10 hrs
3 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Artisan Electrical LLC
Artisan Electrical LLC
4.6(
21
)
Fixed Generator - Install

Serving Greenbelt, MD and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Very friendly from the technician to the secretary. They got me in fast worked with my schedule and got out fast. They also mounted my ring doorbell.. Excellent service and the price was awesome"
Fixed Generator Install
Fixed Generator Install
Fixed Generator Install
Fixed Generator Install
Fixed Generator Install

+2

Response time1 day
9 neighbors recently requested a quote
Recommended by68%of homeowners
Technician Engineers Group
3.7(
15
)
Generator - Install - For Business

Serving Greenbelt, 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 Greenbelt, 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
Green's Electric
5.0(
21
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Greenbelt, MD and surrounding areas

In business since 2007

Free estimates

Credit card accepted

Electrical Service & Repairs - We guarantee your satisfaction, and we won?t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!

1 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for Ethridge Electric & Generator Services
Ethridge Electric & Generator Services
4.8(
33
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Repair - For Business

Serving Greenbelt, 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 Greenbelt, MD and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"We had been considering a home generator for a few years as the power grid we are on has periodic problems, with no solution in sight from Dominion Power.  We did our due diligance on interviewing a number of providers found on Angies List.  In the end, we had a couple of good offers, but none we are responsive as Patrick Collins of Ritzau. LLC.  Patricks team we very responsive and professional.  From the time I asked to schedule for an estimate until the deal was complete...he was always matter of fact and to the point, timely with responses to my questions, and was always open and honest.  His company is smaller than some I interviewed, and he actaully is the installer and has hands on the entire project.  Others companies while competitive, had sales reps visit and do the estimates, and were not part of the install team.  It has been my experience that you want to deal directly with the team lead for these types of projects, and Patrick was the best.  The package deal included the lastest Generac 22KW generator, vice the 20KW that others offered.  The long pole in the tent was getting Washington Gas to install upgraded gas meter that would accomodate the generator, and the Fairfax Country inspections.  
Overall this was an excellent experience.  I would highly recommend Ritzau, LLC and Patrick Collins to anyone who is serious about getting a home generator.  They are the pros and get down to business.  Quick, professional and timely.

"
Recommended by100%of homeowners
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Generator Install questions, answered by experts

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.

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.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

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.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

The Greenbelt, MD homeowners’ guide to generator installs

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