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Verified Reviews for Generator Install pros in Keystone, SD

*The Angi rating for Generator Install companies in Keystone, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Keystone, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on December 07, 2025

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Avatar for Mr. Electric of the Black Hills

Mr. Electric of the Black Hills

4.89(
42
)
•Approved Pro

Mr. Electric of the Black Hills

4.89(
42
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 local quotes requested

Need an electrician in Rapid City or Pennington County to help you cut down costs on your next electricity bill? Let Mr. Electric of The Black Hills, help you reach your goals. With around the clock availability, our team offers several services that could benefit not only your home or business, but also the environment. Whether it's for safety and security or specialty lighting for the holiday season, Mr. Electric of the Black Hills, can assist you with your every need.

"I was pleased with the quality of Cody’s work installing an EV charger. He was very honest. I thought I needed to upgrade my 150 amp service panel to a 200 amp panel to handle the EV charger, but when he evaluated the extra load and the panel’s current load, he told me the upgrade was not needed for the EV charger. That made the job very inexpensive."

Robert G on January 2025

Need an electrician in Rapid City or Pennington County to help you cut down costs on your next electricity bill? Let Mr. Electric of The Black Hills, help you reach your goals. With around the clock availability, our team offers several services that could benefit not only your home or business, but also the environment. Whether it's for safety and security or specialty lighting for the holiday season, Mr. Electric of the Black Hills, can assist you with your every need.

"I was pleased with the quality of Cody’s work installing an EV charger. He was very honest. I thought I needed to upgrade my 150 amp service panel to a 200 amp panel to handle the EV charger, but when he evaluated the extra load and the panel’s current load, he told me the upgrade was not needed for the EV charger. That made the job very inexpensive."

Robert G on January 2025

Swiftec, Inc

No reviews yet

Swiftec, Inc

No reviews yet
20 years of experience

Locally owned and operator, Swiftec Inc., has been in business since 2005. Swiftec offers both residential and commercial services. Swiftec strives to be a leader in the electrical Industry with quality standards. The Swiftec goal is to provide a wide range of electrical service that is competitive and proficient. Always reliable and affordable, no job is too large or too small. Experience the Swiftec difference.

Locally owned and operator, Swiftec Inc., has been in business since 2005. Swiftec offers both residential and commercial services. Swiftec strives to be a leader in the electrical Industry with quality standards. The Swiftec goal is to provide a wide range of electrical service that is competitive and proficient. Always reliable and affordable, no job is too large or too small. Experience the Swiftec difference.

My Classic Car Trader LLC

2.00(
1
)

My Classic Car Trader LLC

2.00(
1
)
53 years of experience

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Avatar for Mr. Electric of the Black Hills

Mr. Electric of the Black Hills

5.00(
8
)

Mr. Electric of the Black Hills

5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

24/7 Electrical Service. Since 1994, the professional electricians at Mr. Electric have been serving residential and commercial customers throughout the US and Canada. We get it right the first time, delivering the most comprehensive electrical services including installation, upgrade, and repair solutions available. You can feel confident calling Mr. Electric, knowing that our highly trained electricians will treat you, your family, and your property with the respect and attention to safety you deserve. Whether it's hanging a ceiling fan, installing a custom-designed landscape lighting system, or rewiring a commercial structure, or other electrical services, you can call on Mr. Electric. We have the power to make things better!

"Great job techs were professional"

Cody M on February 2018

24/7 Electrical Service. Since 1994, the professional electricians at Mr. Electric have been serving residential and commercial customers throughout the US and Canada. We get it right the first time, delivering the most comprehensive electrical services including installation, upgrade, and repair solutions available. You can feel confident calling Mr. Electric, knowing that our highly trained electricians will treat you, your family, and your property with the respect and attention to safety you deserve. Whether it's hanging a ceiling fan, installing a custom-designed landscape lighting system, or rewiring a commercial structure, or other electrical services, you can call on Mr. Electric. We have the power to make things better!

"Great job techs were professional"

Cody M on February 2018

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.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

A whole house generator can be worth the extra money for peace of mind if your home is prone to power outages for extended periods of time or if you have life-saving medical equipment that needs to maintain power at all times. These devices can also increase your home’s value, especially in areas prone to extreme weather and power outages.

The Keystone, SD homeowners’ guide to generator installs

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

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