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Avatar for SciFiHomes Inc
SciFiHomes Inc
5.0(
27
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Madison, VA and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"These guys did a fantastic job and were an absolute pleasure to work with. Small business, all primary work done by the three owners/operators of the group, who are are masters in their respective fields: "Tech Guy", Electrician, and Gas Fitter. (I genuinely hope to not cause offense by this broadly generalized description). I had a 20kW Cummins LP/NG-fired automatic backup generator installed and connected to a new automatic transfer switch, and (since we had no existing gas system) a new 500gallon LP propane tank installed and under-grounded to feed the generator. My main electrical panel was brought up to current code in the process. The excavation and burial work was subcontracted to a trusted local operator that did really nice work, and they worked with Southern States to provide a tank and first fill. They handled all the permits and coordinated the inspections. Waiting for the county inspector, and waiting for Southern States to fill the tank after the gas inspection, were the only observable delays in the process, and those were negligible/reasonable. The SciFiHomes people were quick, efficient, and obviously practiced with all of their pieces of the work. They will strongly prefer Cummins-brand generators over the competitors, and they are more a more expensive initial investment compared to them. After doing my own research after their sales pitch, it is a very worthwhile "upgrade". The difference between Cummins' generators and the competitors is fuel efficiency; according to the math, I'll get over 24 hours of additional runtime vs (as an example) Generac's 20kW generator at 40% average load on a full 420gallons of propane in the new 500gal tank. With an extended outage, or multiple long outages as with last winter in Frederick County, that's a very significant advantage. Sorry for the "sales pitch"; I only included this to prove that they're in my opinion very justified in pushing the "premium" brand. We purchased the extended warranty uplift as well as their extended service agreement. We can't recommend them enough; fantastic experience, and this generator has already flawlessly provided over 20 hours of outage coverage in the 5 months we've had it. Winter is coming, and we'll be ready this time. It just works... These guys and their total solution probably isn't the absolute cheapest in the area... but we absolutely got what we paid for. Thanks SFH!"
Cummins Onan 400A ATS
Cummins Onan 20kW
Briggs & STratton Standby Generator
Response time9 hrs
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Raufi Services LLC
Raufi Services LLC
5.0(
27
)
Fixed Generator - Install

Serving Madison, VA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"You cannot find a better contractor than Raufi Services. We hired Raufi Services to install 240V/50A wiring for a hot tub. They were extremely efficient, polite, and timely. The quality of their work was outstanding--I couldn't even tell they ran the wiring in the house after they were done. They were also very competitive in their cost estimate."
Response time1 day
6 neighbors recently requested a quote
Recommended by59%of homeowners
Robertson Electric
New to Angi
Fixed Generator - InstallFixed Generator - Repair

Serving Madison, VA and surrounding areas

Approved

In business since 1968

Free estimates

Credit card accepted

At Robertson Electric, we're proud to serve our community, and we look forward to keeping you comfortable for many years. With a dedication to excellence and customer satisfaction, our professional team provides award-winning service in heating, air conditioning, electrical, plumbing, and indoor air quality in Charlottesville, Virginia, and surrounding areas.\n\nOur founder, Bill Robertson's vision of delivering exceptional service at a reasonable rate has guided us for over 50 years. As one of the largest full-service companies in the area, we take pride in serving long-standing customers, ensuring their homes are comfortable year-round.\n\nWe believe in customer service, guaranteed satisfaction, and a commitment to quality. Our expert technicians handle every job with precision and care to ensure the best service and customer experience possible.\n

Avatar for Charlottesville Generators
Charlottesville Generators
4.8(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Madison, VA and surrounding areas

In business since 2004

Free estimates

"Gave a thorough description of the product and description of installation. Received generator much earlier than expected. Just installed yesterday and expect total hook up shortly. Looking forward to having the annual maintenance plan with this company. They were very responsive and I feel fairly priced. I have recommended them to many of my friends."
Recommended by100%of homeowners
Avatar for Woodson’s Electric
Woodson’s Electric
5.0(
5
)
Portable Generator - Repair

Serving Madison, VA and surrounding areas

Free estimates

Emergency services offered

Warranties offered

Hi, I’m Matt Woodson, owner of Woodson’s Electric. With over 22 years of hands-on experience in the electrical trade, I specialize in delivering high-quality, code-compliant electrical solutions with a strong focus on safety, precision, and long-term reliability.\n\nAt Woodson’s Electric, we don’t believe in shortcuts. Every project—whether it’s a full service upgrade, generator installation, EV charger setup, or detailed troubleshooting—is completed with expert craftsmanship and attention to detail. I take the time to properly diagnose issues, explain solutions clearly, and ensure every job is done right the first time.\n\nAs a family-oriented business owner, I understand the importance of trust when working in your home. I treat every project with the same care and respect I would expect for my own family, building lasting relationships through honesty, professionalism, and dependable service.\n\nIf you’re looking for a skilled electrician who takes pride in quality work and stands behind

This is the finished panel
This is half way done
Generator transfer switch install.
Additional Photos
Additional Photos

+15

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Generator Install questions, answered by experts

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.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

In most cases, there are no tax credits available for home generators. However, that’s a general statement that applies to federal tax credits, so you might have access to state or local tax incentives. You can check the Database of State Incentives for Renewables & Efficiency (DSIRE) for more information about your area. If you hire a reliable home generator installer, they should also know if there are any state or local perks you can use to reduce your installation costs, including tax breaks and rebates.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

The Madison, VA homeowners’ guide to generator installs

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