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Avatar for Mister Sparky Electric
Mister Sparky Electric
5.0(
12
)
Fixed Generator - Install

Serving La Jolla, CA and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"Having electrical issues to the point of calling SDG&E who sent a tech out immediately. Verdict: SDG&E was not the problem; the problem was in our panel. Appointment set, Jeremiah came right on time, made the diagnosis, gave us the options, and made the repairs within the hour. Jeremiah gave great information on the problem and the causes of the issue. Will use Mister Sparky in the future for any electrical issue."
Electrical
264 neighbors recently requested a quote
Avatar for J. Casillas Electric, Inc.
J. Casillas Electric, Inc.
4.2(
908
)
Portable Generator - Install

Serving La Jolla, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1972

Free estimates

Emergency services offered

"Joe was great to work with i asked for a quote and he gave me exactly that and scheduled the installation of 2 wired smoke alarms the next day,Nariel was the electrician and he did a great job, very pleasant, very nice and his work was very neat. I will be using J Casillas electric again."
 custom home
 track lighting
My work.
 low voltage 4inch
 fans

+57

Response time7 hrs
51 neighbors recently requested a quote
Recommended by92%of homeowners
Home Pro Remodeling & Construction, Inc.
4.1(
31
)
Portable Generator - Repair

Serving La Jolla, 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 Eddie's electric
Eddie's electric
5.0(
1
)
Portable Generator - Repair

Serving La Jolla, 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."
Zacharie Ponce
New to Angi
Portable Generator - Repair

Serving La Jolla, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

Electrician with over 10 years of residential and commercial experience. I provide professional installations with a focus on safety and budget friendliness. My craftsmanship is specialized in:\n-New construction \n-Remodeling\n-Custom LED fixtures \n-Panel upgrades\n-EV chargers\n-Troubleshooting\nWorking out of LA county and willing to travel to Ventura and Orange counties.

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Generator Install questions, answered by experts

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.

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 cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

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 La Jolla, CA homeowners’ guide to generator installs

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