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Verified Reviews for Generator Install pros in Sunnyvale, CA

*The Angi rating for Generator Install companies in Sunnyvale, 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 Sunnyvale, 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 November 19, 2025

Find Generator install pros in Sunnyvale

Avatar for Dalcon Electric
Dalcon Electric
4.5(
431
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business+1 more

Serving Sunnyvale, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Emergency services offered

Warranties offered

"Easy to work with and quick install. Communication was friendly and professional."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time9 hrs
Response rate98%
9 neighbors recently requested a quote
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Avatar for Dalcon, Inc.
Dalcon, Inc.
4.7(
85
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Sunnyvale, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Emergency services offered

Small jobs welcome

"Dalcon responded quickly and got the work done. Very friendly and helpful employees"
SPAN Smart Panel
SPAN Smart Panel
Los Gatos Multi Meter
Response time7 hrs
Response rate88%
14 neighbors recently requested a quote
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Avatar for Avant Electric, Inc.
Avant Electric, Inc.
4.8(
16
)
Fixed Generator - InstallFixed Generator - Repair

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"The team at Avant is next level. From planning, to prep and through final inspections, Avant’s skilled approach allows the home-owner to get from ideation to ”finished” without any pressure to do more than our budget allowed. We upgraded our panel; moved the PG&E drop so the wifi meter was no longer next to our master suite; installed a new EV fast-charger; installed a new home security system; upgraded indoor and installed new automated outdoor lighting AND re-wired all our 220a appliances. I’d recommend Avant for any home-owner seeking high value excellent workmanship!"
Response time2 days
Response rate89%
Recommended by64%of homeowners
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Avatar for Indaspec, LLC
Indaspec, LLC
5.0(
15
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Very knowledgeable technician, work was neat and he cleaned up afterward."
Damaged Panels
Damaged Panel Removal
Damaged Panel Close Up
New Panel Install
New Panel- a perfect match

+9

Response time1 day
12 neighbors recently requested a quote
Recommended by64%of homeowners
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Avatar for Arcadia Construction
Arcadia Construction
5.0(
12
)
Portable Generator - Install

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2014

Free estimates

Customers say: Quick response

"No surprises, Beh explained all costs and work needed to safely install and upgrade my electrical needs."
Response time4 hrs
1 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for JP Services
JP Services
4.9(
35
)
Portable Generator - Repair

Serving Sunnyvale, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"Juan installed dog door and mouldings on my door and he did a good job. Will hire again ."
Olé tile
Old tile
Old tile
Countertop remodeling
Countertop remodeling

+72

Response time1 day
2 neighbors recently requested a quote
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Proper Power Electric
5.0(
5
)
Fixed Generator - Install

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time2 days
Response rate100%
2 neighbors recently requested a quote
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Avatar for DaneCo Electric
DaneCo Electric
2.9(
16
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"They give excellent service, they were very professional."
Emergency Generators
Emergency Generators
Emergency Generators
Emergency Generators
Emergency Generators

+25

Response time2 days
8 neighbors recently requested a quote
Recommended by100%of homeowners
Request Quote
Avatar for Mr. Electric of San Jose South
Mr. Electric of San Jose South
5.0(
1
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Sunnyvale, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

Here at Mr. Electric of San Jose South, we're excited to earn your business! Locally owned and operated, we are known in the area for our prompt service and attention to detail. Customer satisfaction is always our primary concern, so be sure to give us a call today!

Ceiling Fan Install
Added new junction box and new fixtures in Bathroom.
Bathroom Remodel
Panel Upgrade
Response time1 day
Response rate85%
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Generator Install questions, answered by experts

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. 

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

Homeowners can often access federal tax credits, such as the Investment Tax Credit (ITC), which covers a percentage of installation costs. Many states and utilities offer additional rebates, grants, or performance-based incentives. These programs can significantly lower your upfront investment. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) or contact your local energy office for current offers.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

The Sunnyvale, 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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