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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

1 neighbors recently requested a quote
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

"Very professional business. I am impressed with their customer service and how thorough they were with my options. Explained in detail and I felt very confident with my decision. Highly recommend this business to anyone."
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Additional Photos
Additional Photos

+10

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

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

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. 

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.

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.