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TRUSTED BY GREENVILLE, DE HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon16
    Verified generator installs reviews

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

Avatar for Lattanzio Electrical Contracting, Inc.
Lattanzio Electrical Contracting, Inc.
4.7(
137
)
Portable Generator - Install

Serving Greenville, DE and surrounding areas

Approved

In business since 2003

Emergency services offered

Warranties offered

"Stephen communicated with me from start to finish and completed the job perfectly, and with precision! Including testing with my generator to provide instruction on usage and verified everything worked as expected!"
total rewire
total rewire
total rewire
Running underground wire on a horse farm
Runing underground wire on a horse farm

+9

Response time7 hrs
Response rate93%
1 neighbors recently requested a quote
Avatar for Princeton Electrical Makeover LLC
Princeton Electrical Makeover LLC
4.5(
210
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Greenville, DE and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"Brian was awesome and fast and courteous. Princeton Electrical was easy to communicate and negotiate with, and offers a fair price for their labor. Had a Level 2 EV charger installed from my townhouse basement to my garage in a few hours without problems."
Tesla in charging status
Wiring Tesla Wall Connector
Full installation
Connection in the panel
Additional Photos

+26

Response time2 days
23 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for BAY LINE CONSTRUCTION, LLC
BAY LINE CONSTRUCTION, LLC
5.0(
8
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business

Serving Greenville, DE and surrounding areas

Approved

In business since 2020

Free estimates

Offers commercial services

"Bay Line Construction did an excellent job installing my EV charger. The crew was professional, efficient, and the work was clean and high quality. They communicated well throughout the process and made everything easy. I highly recommend Bay Line Construction for any electrical work."
project photos
12 neighbors recently requested a quote
Avatar for Harris Plumbing, Heating, Air & Electrical
Harris Plumbing, Heating, Air & Electrical
3.9(
52
)
Fixed Generator - InstallFixed Generator - Repair

Serving Greenville, DE and surrounding areas

Approved

In business since 1988

Credit card accepted

Customers say: Quick response

"Arrived right on time and reviewed all my electrical needs then went to purchase lightbulbs for me and installed three lighting units instead of just two. I am very impressed with Harris’s services."
Team
Team
Team
Truck
Truck

+8

Response time1 day
442 neighbors recently requested a quote
Recommended by27%of homeowners
Lockhart Construction, LLC
4.1(
57
)
Portable Generator - Repair

Serving Greenville, DE and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"We hired Jim Lockhart to design and construct our old run down screened porch and make it into a 3 season porch. Jim used excellent communication skills and computer technology to design,explain, and show pictures of the finished product. His 40 plus years of experience were evident when he went over the progress of the project. Cost factor of the project was reasonable and fair. He also, put in two new storm doors and did and excellent job selecting and installing the doors. Jim and his crew go out of their way to make you satisfied. They take great pride in their work and do and excellent clean up job. I highly recommend Jim. His quality of work is as if he is working on his own home and would treat your home as if it was his. Jim and his crew exceeded our expectations. Jim and his crew showed honest communication and trust."
Response time2 hrs
Recommended by96%of homeowners
Avatar for Horizon Services, LLC (DE)
Horizon Services, LLC (DE)
3.8(
1,298
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Greenville, DE and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Experience The Horizon Difference. \n \nOn-Time Service. Up-Front Pricing. And The Job Done Right and Clean the First Time. GUARANTEED! \n \nHorizon Services is the region's largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey, and Northeastern Maryland. After a quarter of a century in business, Horizons Services remains fully committed to setting the industry standard for customer service, installation, and focusing on things that are important to busy homeowners: respect for their time, their home and their property; up-front pricing, and an unconditional 100% money back guarantee. \n

Recommended by89%of homeowners
Avatar for Simmz Electrical
Simmz Electrical
5.0(
1
)
Portable Generator - Repair

Serving Greenville, DE and surrounding areas

Approved

Emergency services offered

Small jobs welcome

"Joe from Simmz Electrical was very skilled, charged a fair price and was great to work with. He did a wonderful job, worked very carefully and was very neat. He communicated with us quickly; is very reliable and prompt. We felt comfortable with him in our home; he is now our go to guy for anything electrical. Lucky find"
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Generator Install FAQs, answered by experts

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

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.

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home. 

Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for electrical emergencies. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency. 

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 Greenville, DE homeowners’ guide to generator installs

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