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Avatar for Smith Power Group, Inc.
Smith Power Group, Inc.
5.0(
19
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Sewell, NJ and surrounding areas

Approved

In business since 2011

Free estimates

Offers commercial services

"Carlton and Mary Smith are a delightful and professional company to deal with as SPG....they are talented and knowledgeable about anything they say they can do. In addition, they are very cost effective. Everything they said they can do was correct and efficient and on time. I highly recommend dealing with them."
Generator/ Propane
Generator 10kw
Solar Deptford
My Work
My Work

+3

Response time2 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Raynor Services- Electrical/HVAC/Generators/Plumbing
Raynor Services- Electrical/HVAC/Generators/Plumbing
4.5(
162
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Repair

Serving Sewell, NJ and surrounding areas

Approved

In business since 1994

Free estimates

Credit card accepted

We are a local Female & Family owned & operated contractor who has been serving the South Jersey area for over 30 years in all their Electrical, Heating, Cooling, & Generator needs. We perform both light commercial & residential installations, renovations & upgrades. We train our team to not just have the technical skills needed to do their jobs well, but how to help customers get to what they want for both comfort AND budget. Working with us you'll come to expect an amazing office staff to take your calls, address your needs & get the best technicians to complete the work you need done. Our technicians receive weekly training to stay on top of today's ever changing technology. They are all uniformed, background checked & drug tested. We also always give you an upfront price & get your approval before we start any work. We cannot wait to provide you "Service The Way It Used To Be"! Give us a call today!! We proudly hold an A+ Rating with the Better Business Bureau.

Raynor Tech Homeowner
Raynor Tech Homeowner
Raynor Tech Homeowner
Raynor Tech Homeowner
Raynor Tech Homeowner

+19

Recommended by86%of homeowners
Avatar for Kidder Enterprises, LLC
Kidder Enterprises, LLC
4.6(
138
)
Portable Generator - Install

Serving Sewell, NJ and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"Ken is very nice. Explains what's going on, the process and timelines. Had an issue with my charger (I purchased it myself, he just installed it); even though he didn't have to, he walked me through troubleshooting, turned out to be an issue with the programming on the charger itself. He was communicating with me even after my check cleared to make sure I could charge my car fully. Would hire again in a heartbeat."
Response time12 hrs
9 neighbors recently requested a quote
Recommended by64%of homeowners
Avatar for Mister Sparky of Turnersville
Mister Sparky of Turnersville
5.0(
15
)
Fixed Generator - InstallPortable Generator - Install

Serving Sewell, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Fantastic work! They installed under-cabinet LED lighting in our kitchen, and it has completely transformed the space. The lighting is crisp, bright, and perfectly placed to illuminate the countertops and backsplash. The team was prompt, clean, and extremely professional throughout the process. Highly recommend!"
8 neighbors recently requested a quote
Avatar for JNJ Electrical Contracting LLC
JNJ Electrical Contracting LLC
5.0(
11
)
Fixed Generator - Install

Serving Sewell, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Offers commercial services

"Absolutely! Jeff , did an amazing jobs for us. We had an in-ground pool installed. Jeff was professional , courteous and accommodating . He also installed porch lights and fans for us . Highly recommend him!"
Kitchen renovation
Kitchen renovation
Response time4 hrs
Response rate99%
2 neighbors recently requested a quote
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Generator Install questions, answered by experts

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.

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.

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 cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

The Sewell, NJ homeowners’ guide to generator installs

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