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  • Verified reviews icon43
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Find Generator install pros in Downingtown

Avatar for Synergy Power Systems, Inc.
Synergy Power Systems, Inc.
5.0(
10
)
Generator - Install - For Business

Serving Downingtown, PA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"My mother used this company for her generator installation and recommended them to me because she loved them so much. I also ended up hiring them. All went well as expected, start to finish the crew as awesome. No regrets."
Reading Area
Chester County
Denver Pa
Generator Installed
Generac Generator Installed

+10

Response time1 day
Recommended by100%of homeowners
John Gambino Electric
4.8(
253
)
Portable Generator - Install

Serving Downingtown, PA and surrounding areas

Approved

In business since 1985

Free estimates

Credit card accepted

"So much YES!!! John called me back within one business day of my initial inquiry to give us a quote and explain the generator transfer switch install process. We set an appointment for which Bill showed up exactly on time. He was OUTSTANDING. He explained everything he was planning to do, answered our questions along the way, gave us status updates and even though our house wasnâ t the most cooperative, went above & beyond to put the transfer switch in a spot that was more challenging for him but more convenient for us. Top notch customer service. He walked us through how to work everything and simulated a power outage to ensure it was perfect. And it was. John Gambino Electric has new lifelong customers. Thanks John & Bill!!!"
Response time9 hrs
50 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Mister Sparky Electric
Mister Sparky Electric
4.4(
324
)
Fixed Generator - InstallPortable Generator - Install

Serving Downingtown, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1959

Free estimates

Emergency services offered

"Jason installed doorbells at 2 doors. There were no functioning doorbells when I purchased this house 5 years ago. Various contractors warned me of the difficulty and expense of hardwired installations, making me put off the project. Wireless doorbells were unreliable. I was encouraged by James, who did my annual electrical maintenance, and scheduled the work for me. Jason did a fantastic job by creative thinking to avoid the difficulties I'd previously been warned about. He did the job quickly, neatly, and very successfully. I am thrilled to have working doorbells for the first time in 5 years!"
 Office
  Office
  Office
157 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for A&M Electric LLC
A&M Electric LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Repair+3 more

Serving Downingtown, PA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

A&M Electric LLC is a veteran-owned, Christian-based electrical contractor proudly serving Lancaster County and surrounding Central Pennsylvania communities with reliable residential, commercial, agricultural, and industrial electrical services. We specialize in electrical panel upgrades, 200 amp service upgrades, EV charger installation, generator installation, electrical troubleshooting, lighting installation, rewiring, new construction wiring, remodels, emergency electrical repairs, and commercial electrical services. Our licensed electricians provide safe, code-compliant, and high-quality electrical work for homeowners, businesses, farms, warehouses, offices, retail spaces, and construction projects throughout Lancaster County and Central Pennsylvania from our base in Ephrata, PA. Also serves Reading, Lancaster, York, the greater Harrisburg and Philadelphia areas, Mohnton, Coatesville, Landale, Montgomery County, Hatfield, King of Prussia, and Bryn Mawr.

Project Photos
Project Photos
Project Photos
Project Photos
Project Photos

+35

36 neighbors recently requested a quote
Avatar for Craig Service Group
Craig Service Group
4.8(
22
)
Fixed Generator - Install

Serving Downingtown, PA and surrounding areas

Approved

In business since 2015

Emergency services offered

Warranties offered

Craig Service Group specializes in mechanical, electrical, and plumbing installation, repair, and maintenance. Serving residential, commercial, and industrial customers across Southeastern Pennsylvania and New Jersey, we bring decades of hands-on experience to every job.\n\nAs a fully licensed, bonded, and insured business, we treat your property as if it were our own, delivering top-quality workmanship and the personalized attention only a family-run business can provide. At Craig Service Group, our commitment to doing what’s right, standing by our clients, and building lasting relationships is at the heart of everything we do.

HVAC
HVAC
HVAC
HVAC
HVAC

+3

7 neighbors recently requested a quote
Recommended by72%of homeowners
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Generator Install questions, answered by experts

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.

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup power.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

The Downingtown, PA homeowners’ guide to generator installs

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