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Find Generator install pros in Derby

Avatar for Anderson Water & Power
Anderson Water & Power
4.4(
618
)

Serving Derby, NY and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"We really like the professional job done by Paul, James III and Nate, they answered all our questions and explained everything to our understanding. They are no doubt well-trained in their field and dedicated to the reputation of the company. Kudos to our saleperson Tom, who also happens to be the president. We had on-location visits from 3 companies to have a whole-house generator installed and no doubt picked the best company."
Free Water Test!
Cummins
Cummins Install
Cummins
Transfer switch Cummins

+62

Response time2 days
194 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Dynamic Electrical Solutions
Dynamic Electrical Solutions
4.5(
149
)

Serving Derby, NY and surrounding areas

Approved

In business since 2013

Emergency services offered

Warranties offered

"They called promptly, set an appointment quickly and in a very short time frame, and kept the appointment flawlessly. And to my delight, got my charging station installed same day!"
200 Amp Underground
200 Amp Underground
200 Amp Underground
200 Amp Underground
200 Amp Underground

+33

Response time1 day
14 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Johnny's Generator Maintenance
Johnny's Generator Maintenance
5.0(
6
)

Serving Derby, NY and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"I recently had my generator repaired and serviced, and I was very impressed with the quality of work. Johnny was professional, knowledgeable, and took the time to make sure everything was running properly before he left. My generator is now running great, and I appreciate the honest, reliable service. I highly recommend him for generator repair and maintenance needs."
Generac Standby Generator
1 neighbors recently requested a quote
South Townes Electric
New to Angi

Serving Derby, NY and surrounding areas

Approved

In business since 2018

Free estimates

Offers commercial services

South Townes electric, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 15 years of experience serving Hamburg, NY and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

Avatar for PELCO Electric -
PELCO Electric -
5.0(
2
)

Serving Derby, NY and surrounding areas

In business since 2018

Free estimates

Emergency services offered

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, LED lighting retrofits, smart home setups, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

4,000 Sq. Ft New Home
Residential
Residential
Residential
Residential

+2

Response time10 hrs
Recommended by100%of homeowners
Showing 1-10 of 27
Generator Install questions, answered by experts

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.

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

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 Derby, NY homeowners’ guide to generator installs

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