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Cimas Technologies
4.7(
19
)

Serving Key Largo, FL and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

"They diagnosed the problem we had with our generator just by the description given to them on the phone. We hire them on a regular basis now to do the generator maintenance. They have us on a yearly schedule and up to now we are satisfied with their work and believe me we have had other companies before and you cannot compare, very professional."
Recommended by100%of homeowners
Avatar for Florida Standby Power Systems
Florida Standby Power Systems
5.0(
2
)

Serving Key Largo, FL and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Florida Standby Power Systems is A great company to work with. They are professional and have very high standards. The work they do is done correctly, on time, and professionally. I would recommend them for anyone who has industrial generators that need to be serviced or repaired."
Radiator install
Damaged transfer
Repaired switch
Maintenance
Response time6 hrs
3 neighbors recently requested a quote
Avatar for AP Electric
AP Electric
New to Angi

Serving Key Largo, FL and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Hi, my name is Alejandro. I’m a licensed electrician with years of experience in residential and commercial electrical work. I specialize in safe, reliable wiring, troubleshooting, and installations, from lighting and outlets to full electrical systems. My goal is to make sure your home or business runs smoothly and safely, while providing honest advice and quality workmanship you can trust. I’m here to help with any electrical needs you have, no matter the size of the job.

Lights
Lights
Lights
Lights
Full kitchen remodel

+10

Avatar for Global Power Services
Global Power Services
5.0(
6
)

Serving Key Largo, FL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Usually I’m always all over the place when selecting a company and have to do a lot of price comparison, but when coming down to it Angi had an amIng price for the service. I’ve recommended them to family and friends due to their quick servicing and hustle mentality! They’ll get it done and that’s for sure !!"
Additional Photos
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+10

Recommended by83%of homeowners
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Generator Install questions, answered by experts

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home

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 portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

The Key Largo, FL homeowners’ guide to generator installs

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