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TRUSTED BY HALLAM, PA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon11
    Verified generator installs reviews

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

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

Serving Hallam, 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
Avatar for True Modern Electrical Services Plus, LLC
True Modern Electrical Services Plus, LLC
5.0(
23
)
Portable Generator - Install

Serving Hallam, PA and surrounding areas

Approved

In business since 2020

Small jobs welcome

Credit card accepted

"Hired True Modern Electrical Services Plus to add an outlet in my garage. He was very quick to respond to my request and schedule a time to come out and give me an estimate. Throughout the whole process, he was responsive in answering my questions regarding the project and permitting. Then he did a wonderful job on the install and I am very happy with his work. Would definitely hire him again for my future electrician needs."
Outdoor Fixture
Garage Ceiling Fixture Installed
Overveiw of outdoor Lighting
Junction Box Missing Cover
Junction Box Cover Installed

+8

Response time9 hrs
Response rate92%
9 neighbors recently requested a quote
Avatar for Robert Likens Electric
Robert Likens Electric
4.7(
621
)
Portable Generator - Install

Serving Hallam, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Emergency services offered

Warranties offered

"Hired Robert for installation the transfer switch. Installation was successful. Robert is a professional highly qualified electrician. explained exactly how it works. The whole process from proposal to installation took less than a week. Now, if any electrical work is needed, I will always call him because for the quality. I will also recommend it to my friends. Thank you very much for your work!"
 Ceiling Fans
 200 Amp Panel Install
 Ceiling fans
 Townhouse Rehab
 Rough IN

+8

Response time6 hrs
Response rate88%
2 neighbors recently requested a quote
Avatar for A&M Electric LLC
A&M Electric LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Repair+3 more

Serving Hallam, 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.

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+35

49 neighbors recently requested a quote
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Generator Install FAQs, answered by experts

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.

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.

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.

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

The Hallam, PA homeowners’ guide to generator installs

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