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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
42 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
91 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

46 neighbors recently requested a quote
Avatar for A. F. L. Electric, LLC
A. F. L. Electric, LLC
4.5(
8
)
Fixed Generator - Install

Serving Downingtown, PA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

A.F.L. Electric is a small growing family owned business serving Bucks, Montgomery, Delaware and Chester counties in Pennsylvania . We are a licensed and insured contractor with master electricians who are engaged in on going training and continued hours of education to ensure that A.F.L. Electric brings the most qualified service to its customers. We are an authorized Generac dealer. \n \nOur 23 years in business has brought the company to be experts in the Residential, Commercial and Industrial sectors of electrical contracting. Our one on one interaction with our customers starts with the motto that we answer our phones, and we do! \n

5 neighbors recently requested a quote
Recommended by71%of homeowners
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Generator Install questions, 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 safe to use as long as they are installed and operated correctly according to the manufacturer's recommendations. The most critical safety tips are to never use a portable or fuel-powered generator inside an enclosed space due to the risk of lethal carbon monoxide poisoning; always operate it outdoors where fumes can dissipate away from your home. Additionally, never attempt to connect a generator to your home’s electrical panel yourself—hire a professional to ensure the setup meets safety standards. Finally, avoid overloading the generator by not connecting more appliances than it is rated for, as this can damage your equipment or cause a fire.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

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 Downingtown, PA homeowners’ guide to generator installs

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