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Avatar for Electrical & Security Solutions, LLC
Electrical & Security Solutions, LLC
5.0(
13
)
Fixed Generator - InstallFixed Generator - Repair

Serving Greenfield, NH and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Electrical & Security Solutions are the best! I have needed their services more than once to replace lights, a ceiling fan and also to install a new electrical box and breaker for our garbage disposal. Tyler promptly responded every time I called and he and Casey are both friendly, efficient and skillful. Aside from the excellent service, the qualities I appreciate the most is honesty for what work needs to be done and how Tyler is also very budget consciousness."
Landscape lighting
Landscape lighting
Landscape lighting
Landscape lighting
Landscape lighting

+10

Response time7 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Let It Glow Electric, LLC
Let It Glow Electric, LLC
4.6(
32
)
Portable Generator - Install

Serving Greenfield, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Justin did great job, intalled the hookup and the transfer switch for the portable generator. Worked in freezing temperature outside. The only downside was that the install was postponed few times because he was waiting for the parts"
Exterior
Kitchen
Main service
Transfer switch and main panel
Canopy recessed cans retrofit

+27

Response time1 day
3 neighbors recently requested a quote
Recommended by76%of homeowners
MJS Electrical Services, LLC
3.6(
38
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Greenfield, NH and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

"MJS Installed my new Generator, Gas piping, gas stove and telescopic downdraft kitchen vent. every aspect of the system installation was on point. in meeting the building inspector, he noted that this company has always preformed they installations to code and safety highly recommend MJS all techs and office staff always kept me informed"
7 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Brens Electric LLC
Brens Electric LLC
5.0(
1
)
Generator - Install - For BusinessPortable Generator - Install

Serving Greenfield, NH and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

We bring years of proven experience and a strong work ethic to every project we undertake. As a fully licensed and insured electrical contractor, we combine technical expertise, attention to detail, and strict compliance with all applicable electrical codes and safety standards. Our work is performed with professionalism, precision, and accountability. Whether managing complex electrical systems or providing routine maintenance, every task is completed with a focus on quality, reliability, and long-term performance. Our goal is to build lasting relationships built on trust, consistency, and exceptional service.\n

800A Service Upgrade
800A Service Upgrade
8 neighbors recently requested a quote
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Generator Install questions, answered by experts

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

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.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

The Greenfield, NH homeowners’ guide to generator installs

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