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

BN Electric & Comms
4.7(
57
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Mars, PA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"I am truly impressed with the quality and professionalism of BN Electric! I received immediate phone and email responses to my initial Service Magic request...and an appointment was conveniently set up for the next day (a Saturday!). All work was not only fully explained and completed cleanly and efficiently, but with true pride in a job done right! Butch and Chris were very friendly and stuck to the original quote even though the job required a bit of extra unexpected work. I will definitely be using their services in the future and will recommend them to anyone in need of electrical services! Thank you, Butch!"
Recommended by100%of homeowners
Avatar for The Electrical Company LLC
The Electrical Company LLC
4.3(
23
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Mars, PA and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Very personable, listened to what I was able to relay about my project, gave me realistic options and recommended one solution and stated the reasons why - worked to replace my panel until it was complete and added a generator connection that I had been wanting. Top notch work and service - will hire again for future projects!"
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+8

14 neighbors recently requested a quote
Recommended by63%of homeowners
Calfo Home Services
4.3(
234
)
Fixed Generator - Install

Serving Mars, PA and surrounding areas

Approved (Corporate)

In business since 2008

Emergency services offered

Warranties offered

The problem with most "pros"? Too many bad habits. \nIt's easy to get swept away in the day to day monotony, even for those that call themselves "pros". When it comes to hiring a heating and cooling technician, nobody wants to deal with being treated like a sale rather than a person, the use of scare tactics instead of education, or someone who just wants to get to job done quickly instead of correctly. \nAll our HVAC pros go through 5 years of HVAC schooling, for a total of 10,000 hours of on-the-job training. And it's not just technical training either; it's training that focuses on you, on making you feel comfortable every step of the way. We will roll out the red carpet for you, both figuratively and literally. \nRed Carpet Treatment \nDuring every visit to a home, we lay out an actual red carpet to prevent any additional mess. But what may be even more important than just protecting your home is making sure you feel like you've received the best in customer service.

Recommended by84%of homeowners
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Generator Install FAQs, answered by experts

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 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.

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. 

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. 

The Mars, PA homeowners’ guide to generator installs

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