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Avatar for Mr. Electric of Golden CO
Mr. Electric of Golden CO
5.0(
17
)
Portable Generator - Install

Serving Derby, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Mr Electric of Golden put together an amazing team to solve a challenging problem at my mountain home. I wouldnâ t hesitate to hire them again. Many thanks to Clay, Liz, Randy, Brandt and Chris"
Electrical Safety
Repairs
Installations
Another Quality Job Completed
Wall where the customer requested the charger

+25

Response time2 hrs
Response rate99%
7 neighbors recently requested a quote
Avatar for Productive Electric, LLC
Productive Electric, LLC
4.9(
14
)
Generator - Install - For Business

Serving Derby, CO and surrounding areas

Approved

In business since 1992

Free estimates

Credit card accepted

"Tom was great at installing my RV outlet. Out of the 3 different quotes I received, he was able to get it done without trying to talk me into more expensive options. He was also accommodating with my somewhat busy schedule and very responsive throughout the install planning process. I would highly recommend Productive Electric."
Response time1 day
12 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for True Bloom Energy Solutions LLC
True Bloom Energy Solutions LLC
5.0(
6
)
Fixed Generator - Install

Serving Derby, CO and surrounding areas

Approved

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

12 neighbors recently requested a quote
Avatar for Rapid Energy Solutions, LLC
Rapid Energy Solutions, LLC
4.7(
12
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Derby, CO and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Woman who called me to give me more info and schedule was excellent and very friendly, great communication with her. The owner, I believe, who came to look at the job and give me a bid was professional and efficient as were the 3 guys who did the work. There was a 2 hour minimum work window which meant a $200 starting base price. They were done with my two projects (installing the outlet and fixing a hallway light) in less than an hour, so I guess I should have had more projects to get my full money's worth. They did a great job, though."
4 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Blue Sky Plumbing & Heating Inc.
Blue Sky Plumbing & Heating Inc.
5.0(
6
)
Fixed Generator - Install

Serving Derby, CO and surrounding areas

Approved

In business since 1989

Free estimates

Small jobs welcome

Blue Sky Plumbing, Heating, Cooling & Electric is a fourth-generation, family-owned home service company proudly serving the Denver Metro area since 1916. For over 100 years, our team has delivered trusted plumbing, HVAC, sewer, drain, electrical, and indoor air quality solutions with a commitment to honest service and long-term customer relationships.\n\nAs a locally owned company, we combine modern expertise with generations of hands-on experience to provide reliable repairs, installations, maintenance, and emergency services for homeowners across Colorado. Customers choose Blue Sky for our highly trained technicians, transparent communication, same-day availability, and dedication to doing the job right the first time.\n\nFrom routine plumbing repairs to complete heating, cooling, and electrical upgrades, Blue Sky is committed to delivering comfort, safety, and peace of mind to every home we serve.

Photos
60 neighbors recently requested a quote
Redrocks Roof and Solar LLC
4.1(
9
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Derby, CO and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"Really responsive and prompt, especially in the installation phase. We did have a couple of small hiccups, which in my mind a homeowner should expected on literally any remodeling project, and they were resolved quickly. Communication on final details like inspections could have been smoother, but overall the whole process was very clear, well managed, and well executed. Happy with the choice to go with Red Rocks."
Response time1 day
Response rate89%
Recommended by75%of homeowners
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Generator Install questions, answered by experts

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. 

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

Costs depend on generator type, labor, and additional wiring or transfer switch requirements.

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.

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

The Derby, CO homeowners’ guide to generator installs

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