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Verified Reviews for Generator Install pros in Costa Mesa, CA

*The Angi rating for Generator Install companies in Costa Mesa, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Costa Mesa, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on February 02, 2026

Find Generator install pros in Costa Mesa

Avatar for Casaroja Electric Inc
Casaroja Electric Inc
5.0(
19
)

Serving Costa Mesa, CA and surrounding areas

Approved

Emergency services offered

Warranties offered

Offers commercial services

"Sergio walked me through the process to get my panel done. I recommend him 100%. On time, neat, good communication. Call him for your electrical needs!"
Panel upgrade
Panel upgrade
Panel upgrade
Panel upgrade
Panel upgrade

+1

5 neighbors recently requested a quote
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Avatar for Steve Cavenee Electric Inc
Steve Cavenee Electric Inc
4.5(
680
)

Serving Costa Mesa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1980

Free estimates

Warranties offered

"Steve Cavanee Electric installed a power transfer unit at my house to transfer power from the grid to generator power. They did excellent work, showed on time and did the installation at a fair and reasonable price. They provided follow-up communication with directions as well. I will be using them again as the need arises."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+30

Response time7 hrs
3 neighbors recently requested a quote
Recommended by87%of homeowners
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Western Sunset Builders
4.6(
14
)

Serving Costa Mesa, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Very happy with the work completed by Bill (owner), Josh and Pat. Bill always responds promptly to text and calls and explains things clearly. Provided free quote and visited the house to confirm quote. Josh and Pat arrived on time and worked neatly. Josh was able to avoid trenching thru the ceiling even though attic space was limited. They even put back closet shelf that had to be removed to access attic. Josh and Pat even came by another day to help install a remote that I did not have on the day of installation."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+30

Response time10 hrs
Response rate100%
1 neighbors recently requested a quote
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Home Pro Remodeling & Construction, Inc.
4.1(
31
)

Serving Costa Mesa, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"I hired home pro remodeling to put pavers on my back yard and to install flloring thorough out the whole house I'm super setasfied with the work and the service . The company also provided me great financial options which I used thank you kobi Leo and Lucas for your great service . Highly recommend them for everyone"
Response time5 days
Recommended by77%of homeowners
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Avatar for EnergyAid
EnergyAid
3.6(
130
)

Serving Costa Mesa, CA and surrounding areas

Approved

In business since 2012

Emergency services offered

Warranties offered

"Everything was explained ahead of time and all we needed was addressed by their technician. He made suggestions to improve our output which will save us some money."
Voltage Testing
Solar Panel Removal and Reinstall
Two Batterys
Bird Skirt
Communication Repair

+20

Response time1 day
Response rate97%
9 neighbors recently requested a quote
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Avatar for Eddie's electric
Eddie's electric
5.0(
1
)

Serving Costa Mesa, CA and surrounding areas

Approved

Small jobs welcome

Credit card accepted

"Excellent work. From the start he showed professionalism, punctuality, and great attention to detail. The installation was clean, well organized, and working perfectly both indoors and outdoors. He also explained everything clearly and made sure everything was safe and ready to use. I definitely recommend him for any electrical work — reliable service and top-quality results."
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Generator Install questions, answered by experts

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

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.

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.

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.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

The Costa Mesa, CA homeowners’ guide to generator installs

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

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