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Top-Rated Generator install pros in Rapid City - Updated Nov 2026

Avatar for Canyon Electric LLC
Canyon Electric LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Rapid City, SD and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Kyle, the owner of Canyon Electric, was recommended to us as a trustworthy electrician in the Black Hills area. We had purchased a vacation home in Lead and were having a hot tub and sauna installed. We needed to add 2 240 amp breakers, a new breaker box, and hard wiring both units. We are from across the state and had a deadline for the hot tub installation, which required all wiring done very specifically and in place. Kyle was out at our home wiring and prepping before we even arrived. He was in contact with our hot tub retailer and made sure everything was done perfectly. The wiring on both units was done efficiently. He even did work on one of our bathroom exhaust fans and had it going in quick order. Kyle was a very pleasant person to deal with and we were very impressed with the high standards of his work. We would highly recommend Canyon Electric for any and all of your electrical needs."
Duplex cabin
Duplex cabin
Duplex cabin
14 neighbors recently requested a quote
Avatar for ROC Electric LLC
ROC Electric LLC
4.7(
13
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Rapid City, SD and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"This guy! Response, communication, did what he said he would do, when he said he would do it. A breath of fresh air from what I've experience with others in this field in SD. I would hire him again and highly recommend him."
Response time11 hrs
Recommended by81%of homeowners
Fuze Electric
5.0(
1
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Rapid City, SD and surrounding areas

In business since 2014

Free estimates

Welcome to Fuze Electric! We have a proven reputation of excellence in both quality and efficiency. Our company has thrived on unmatched craftsmanship and technique passed on through generations of family electricians, we'll be sure to impress. \n \nEffective planning is crucial to the successful completion of any project. Before starting the project, first we assess your goals. Then we provide you with an estimate and time-line for completion. From beginning to end you will be involved every step of the way. We have many years of experience, and work hard to make sure the job is done right and in a timely manner. So whether you are building your dream custom home, just adding an outlet, or even remodeling your business. We'll be there whenever you need us, and remember... free estimates! Give us a call today. \n

Fuze Electric
Fuze Electric
Fuze Electric
Fuze Electric
Response time1 day
Recommended by100%of homeowners
Formanek Electric Service
New to Angi
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business+1 more

Serving Rapid City, SD and surrounding areas

In business since 2019

Free estimates

Credit card accepted

Formanek Electric Service is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business. 10% military discount.

Response time10 mins
Generator Install FAQs, answered by experts

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

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.

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.

If your home already has a grinder pump and you’re still noticing issues (like frequently clogged toilets and sinks), it could be time to upgrade your grinder pump. Start by checking your existing horsepower. If there are four or fewer people living in your home, using a 1/2-horsepower grinder pump should be sufficient. Larger households should consider investing in a 1-horsepower grinder pump to maximize wastewater removal efforts.

Generators are safe to use as long as they are installed and operated correctly according to the manufacturer's recommendations. The most critical safety tips are to never use a portable or fuel-powered generator inside an enclosed space due to the risk of lethal carbon monoxide poisoning; always operate it outdoors where fumes can dissipate away from your home. Additionally, never attempt to connect a generator to your home’s electrical panel yourself—hire a professional to ensure the setup meets safety standards. Finally, avoid overloading the generator by not connecting more appliances than it is rated for, as this can damage your equipment or cause a fire.

The Rapid City, SD homeowners’ guide to generator installs

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