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Avatar for Hamilton Electric
Hamilton Electric
4.9(
73
)
Generator - Install - For BusinessPortable Generator - Install

Serving Discovery Bay, 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 rate99%
3 neighbors recently requested a quote
Avatar for Mister Sparky
Mister Sparky
4.8(
13
)
Fixed Generator - Install

Serving Discovery Bay, CA and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

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.

29 neighbors recently requested a quote
Avatar for Villa Handyman - Unlicensed Contractor
Villa Handyman - Unlicensed Contractor
4.7(
48
)
Portable Generator - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: True professional

"We needed work done involving three different trades and were hoping to find one company that could complete all aspects of the job. The work included sheetrock replacement (including texturing to be paint-ready), laminate flooring & padding installation, and bath vanity install & connect water lines. We received estimates from four different companies and chose Armando Espinoza Villa Handyman. Armando came over to see and discuss the job and provided an estimate later that day. He has a calm, low key demeanor and did a good job of listening to what we needed done. His pricing was fair, and he has experience in all the areas involved in our project. He also has many very good reviews on Angi, which was a factor in hiring him. Additionally, we Googled his company to see photos of his work. Armando completed all of the work on our house in just over two days. His work looks professional and we're very pleased with how it turned out. We'd hire him again. We've included photos."
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
Proper Power Electric
5.0(
5
)
Fixed Generator - Install

Serving Discovery Bay, 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 time2 days
Response rate100%
2 neighbors recently requested a quote
Avatar for Patrick M Butterly Electrical Contractor Inc
Patrick M Butterly Electrical Contractor Inc
5.0(
1
)
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Discovery Bay, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"Did a great job, even corrected some code violations that were present when we moved in. Installed multiple 110v, 230v single phase, 230v 3 phase and 480v 3phase circuits, wired a paint booth, Tumbler unit, overhead crane systems, and even did some repairs on a complicated piece of machinery that wasn’t working. Great guys work hard no excuses. They get the job done plain and simple. I had used them twice because they were that reliable."
Cranes
Avatar for Vilroy
Vilroy
New to Angi
Portable Generator - Repair

Serving Discovery Bay, 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

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

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. 

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

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.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

The Discovery Bay, CA homeowners’ guide to generator installs

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