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TRUSTED BY DERRY, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon50
    Verified generator installs reviews

Find Generator install pros in Derry

Chad Woods
4.9(
75
)
Portable Generator - Install

Serving Derry, NH and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"Competent, quick, and neat. Explains installation and operation in detail. Returns calls quickly and has better customer service skills than most companies I have dealt with. This job was for wiring a backup generator to house. Will hire again for any electrical work needed."
Response time8 hrs
7 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for ARETE ELECTRIC
ARETE ELECTRIC
5.0(
20
)
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business+1 more

Serving Derry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Credit card accepted

"They were very professional, cleaned up the area as they finished. They installed a They installed a combo mini split system with three inside heads . They arrived on time and completed the job in one day . They were very efficient and the installation was perfect"
Response time3 hrs
3 neighbors recently requested a quote
Recommended by5%of homeowners
J.W. Chick Electric
4.8(
69
)
Portable Generator - Install

Serving Derry, NH and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Jeff and his team did an amazing job for my home renovation. They rewired an entire floor, removing then installing all new outlets, wiring for mini-splits, televisions, fixtures, fire/co2 detectors and a new electrical panel. They installed three wall mounted televisions, numerous lighting and fan fixtures with ease. Josh was a beast, crawling around in the attic and getting our new bathroom vents in and making sure all the switches worked together. They put in some late hours to make sure the job was done right. I would highly recommend Jeff and his team for your electrical needs."
Response time3 days
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Krafton Electric, LLC
Krafton Electric, LLC
4.6(
121
)
Portable Generator - Install

Serving Derry, NH and surrounding areas

Approved

In business since 1990

Free estimates

Customers say: True professional

"I have to say that David Krafton is an excellent electrician. I. Called him about a. light. Over. My sink that I could not fix by replacing the bulbs. He came out and told. Me the light was not working, as it was shorted out. He then went and bought me a new light and installed it. It works get and is so much brighter the the previous one. Thank you David I will be calling you again to do other work for me. Loraine in Bedford N.H."
kitchen renovation
kitchen renovation
existing 100 amp service panel
old and existing circuit breaker electrical panel
existing

+5

Response time1 day
3 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for The Speedy Sparky LLC
The Speedy Sparky LLC
5.0(
8
)
Fixed Generator - Install

Serving Derry, NH and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

With over 10 years of experience, we pride our company on our quality of work. We are owner operated, and believe in building long-term relationships with our clients by delivering tasks that are accomplished in a neat and workman like manner. Give us a call today. We look forward to working with you!

Camper outlet & breakers
Camper outlet & breakers
Response time1 day
1 neighbors recently requested a quote
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Generator Install questions, 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.

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

Homeowners can often access federal tax credits, such as the Investment Tax Credit (ITC), which covers a percentage of installation costs. Many states and utilities offer additional rebates, grants, or performance-based incentives. These programs can significantly lower your upfront investment. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) or contact your local energy office for current offers.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

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.

The Derry, NH homeowners’ guide to generator installs

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