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Valley Sparks Electric
4.9(
25
)
Generator - Install - For BusinessGenerator - Repair - For BusinessPortable Generator - Install

Serving Antioch, CA and surrounding areas

Approved

In business since 2021

Free estimates

Offers commercial services

"The cost was very inexpensive campared to the average price i found on the internet and the installation went easy and without a hitch! Would hire VSE again in a second!"
Response time2 days
2 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Hamilton Electric
Hamilton Electric
4.9(
63
)
Generator - Install - For BusinessPortable Generator - Install

Serving Antioch, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"I recently had the pleasure of working with Brian from Hamilton Electric for a hot tub installation, and I couldn’t be more impressed with the experience. From start to finish, Brian demonstrated the highest level of professionalism, expertise, and attention to detail. The entire installation was handled seamlessly, with meticulous planning and execution to ensure everything was up to code and functioning perfectly. Brian was incredibly knowledgeable, answering all my questions with clarity and confidence. His workmanship was outstanding, and he took the time to ensure a clean and safe setup. Beyond the exceptional quality of work, the pricing was very reasonable, offering great value for the level of service provided. It’s rare to find an electrician who combines technical expertise with such professionalism and customer-focused service. I highly recommend Hamilton Electric for any electrical work—especially for specialized projects like hot tub installations."
Charge controller
Charge controller
Charge controller
Charge controller
Charge controller

+41

Response time4 hrs
Response rate98%
7 neighbors recently requested a quote
Avatar for Villa Handyman - Unlicensed Contractor
Villa Handyman - Unlicensed Contractor
4.6(
47
)
Portable Generator - Repair

Serving Antioch, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: True professional

"Armando is very professional, and I almost did not hire him because of a previous review he had on his feedback. Therefore, I received another quote from a higher rated area contractor who also stated prices were better. The other company failed to show up as scheduled, but arrived the following day and his prices were higher than Armandos quote. He did a fantastic job, price was fair, and was promt. He is trust worthy too, I had to run to my daughters college, 3.5 hours later, I arrived back at home..everything was perfectly installed, other items working in tip-top shape. He is respectful, and he is picks up after himself (and some of my extra dog hair too). Armando is my new, go to handyman. I am sure you will find him great.. He serves the Pleasanton area toom"
New remodel kitchen
Main water line replace
All cities projects well
All cities projects well
All cities projects well

+9

Response time4 hrs
Response rate89%
9 neighbors recently requested a quote
Avatar for Mister Sparky
Mister Sparky
4.8(
5
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Antioch, CA and surrounding areas

Approved

Free estimates

Warranties offered

Credit card accepted

At Mister Sparky®, we know how much you depend on electricity to power your daily life. Luckily, we’re experts when it comes to safeguarding against its inherent dangers and are ready to do the reliable work needed to ensure your home’s electrical systems work for years to come.\n\nOur highly trained, licensed electricians are professional troubleshooters who hunt potential hazards and fix them before they cause serious damage. We show up on time, guaranteed, and deliver 100% satisfaction guaranteed with every service call. And because we’re locally operated, our electricians are familiar with the challenges you might face.

38 neighbors recently requested a quote
Proper Power Electric
5.0(
5
)
Fixed Generator - Install

Serving Antioch, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"We hired proper power electric to update lighting and switches in our home. Forest and foster showed up on time. They were professional and in sync with each other. We added recessed lighting, fan ,and outdoor lights to our new home. Forest made suggestion to add another switch down the hallway to make it easier to turn off lights when going to the room. Both were knowledgeable, helpful and very friendly. They even helped my neighbor with their solar panel system. We had a great experience and will definitely hire again."
Response time5 hrs
3 neighbors recently requested a quote
Avatar for Bay Area Construction Projects LLC
Bay Area Construction Projects LLC
5.0(
2
)
Portable Generator - Repair

Serving Antioch, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Great customer service. Started job quickly. No short cuts doing a quality repair of window flashing install under wood paneling directly above window and making new paneling and installed. We hope to use him again. Highly recommend!"
5 neighbors recently requested a quote
Avatar for Vilroy
Vilroy
New to Angi
Portable Generator - Repair

Serving Antioch, CA and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

With over 28 years of experience in residential and commercial electrical services, I am a fully licensed electrician in the State of California, committed to delivering excellence in every project.\n\nMy work is built on precision, safety, and strict compliance with California electrical codes. From panel and subpanel upgrades to three-phase systems, transformers, lighting installations, and advanced troubleshooting, every job is executed with professionalism and attention to detail.\n\nI don’t just complete projects — I deliver safe, efficient, and long-lasting electrical solutions.\n\nProfessional. Reliable. Done right the first time.

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Generator Install questions, answered by experts

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

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.

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.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

The Antioch, CA homeowners’ guide to generator installs

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