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Verified Reviews for Generator Install pros in Rosemead, CA

*The Angi rating for Generator Install companies in Rosemead, 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 Rosemead, 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 July 22, 2026

Find Generator install pros in Rosemead

Avatar for LT Generators
LT Generators
4.3(
82
)

Serving Rosemead, CA and surrounding areas

Approved

In business since 1995

Free estimates

Warranties offered

"The crew very polite and informative. The whole house generator installed in one day and my place was left clean. The installation project was done in a cosmetic pleasing manner and no ugly pipes or wires are visible. I was given a detailed cost of the project and kept informed at all times. It was not the lowest bid but the work was excellent and I am very happy with the finished project. The office staff are very helpful and their excellent service and detailed bid is why I chose to go with LT Generator."
22kw Generac Natural Gas Generator
27kw Generac Natural Gas Generator
Kohler Liquid Cooled
27kw Generac Natural Gas Generator
Kohler Air Cooled 20kW

+12

24 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for Casaroja Electric Inc
Casaroja Electric Inc
5.0(
19
)

Serving Rosemead, CA and surrounding areas

Approved

Emergency services offered

Warranties offered

Offers commercial services

"Sergio did a fantastic job! Very happy with the clean install of my tier 2 charger and he added a plug down below my panel. Would recommend for any sort of EV charging installs! Clear communicator, showed up when he said he would and his services were well-priced!"
Panel upgrade
Panel upgrade
Panel upgrade
Panel upgrade
Panel upgrade

+1

5 neighbors recently requested a quote
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Avatar for ZERO ELECTRIC
ZERO ELECTRIC
4.9(
10
)

Serving Rosemead, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Credit card accepted

"Highly Recommended! We have hired Zero Electric to do several jobs at our apartment complex including installing a generator, EV chargers, new panel, and even installing recessed lighting in the units. They handled all aspects of the projects and had top notch communication throughout. The team has always been quick and professional. We will continue using Zero Electric for our electrical needs."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

1 neighbors recently requested a quote
Recommended by70%of homeowners
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Avatar for Accurate Electric, Plumbing, Heating and Air
Accurate Electric, Plumbing, Heating and Air
4.5(
14
)

Serving Rosemead, CA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"I worked with the owner and the field supervisor - both extremely nice & very professional. I hope I have additional work needed in the future just so that I can work with them again!"
Jeff Seale - Owner
Albert Aragon - Dispatch
Cheri Fortner - Operations Manager
Dan Hartman - Journeyman Plumber
Eric Bribiesca - Comfort Advisor

+23

15 neighbors recently requested a quote
Recommended by81%of homeowners
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Avatar for M.D.H. Builders/Design/Development
M.D.H. Builders/Design/Development
5.0(
7
)

Serving Rosemead, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Everyone I dealt with was a delight. Competent, on time and efficient. While the true test of a new roof won’t be know until it rains, at the moment, I’m completely satisfied with the work that was done."
New Build
New Build
New Build
New Build
New Build

+32

Response time2 days
Response rate88%
104 neighbors recently requested a quote
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Home Pro Remodeling & Construction, Inc.
4.1(
31
)

Serving Rosemead, 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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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.

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

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

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

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

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup power.

The Rosemead, 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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