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Avatar for Steve Cavenee Electric  Inc
Steve Cavenee Electric Inc
4.5(
680
)
Portable Generator - Install

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."
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+30

3 neighbors recently requested a quote
Recommended by87%of homeowners
Western Sunset Builders
4.6(
14
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

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."
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+30

2 neighbors recently requested a quote
Recommended by84%of homeowners
Home Pro Remodeling & Construction, Inc.
4.1(
31
)
Portable Generator - Repair

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
Avatar for M & E S CONSTRUCTION ENGINEERING INC
M & E S CONSTRUCTION ENGINEERING INC
5.0(
5
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Costa Mesa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1999

Free estimates

Offers commercial services

"The folks a M&ES CONSTRUCTION ENGINEERING INC. Did a great job with my project. They renovated my garage, they drywalled and painted it, also gave me a beautiful epoxy floor thats easy to clean and a treat for the eyes. I also had them remove my old brick gas fireplace and build a tile faced electric fireplace with an insert for my Television. My TV fits perfectly and it looks amazing. Workmanship is top notch, they are transparent, punctual, and very communicative. Truly the best contractors I’ve worked with."
My Work
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+33

Response time20 mins
7 neighbors recently requested a quote
Avatar for Eddie's electric
Eddie's electric
5.0(
1
)
Portable Generator - Repair

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 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.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

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.

Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for electrical emergencies. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency. 

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

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.