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Avatar for Zarco's Electrical
Zarco's Electrical
4.5(
64
)

Serving Greenbrae, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"On time for consultation for installation of generator panel?? Installation went well, the staff was on time for the installation, communicated what they were doing, put together the generator for me and cleaned up after the job."
Response time6 hrs
Response rate86%
7 neighbors recently requested a quote
Avatar for CA Electrical Group 24/7
CA Electrical Group 24/7
4.7(
61
)

Serving Greenbrae, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Ben did a great job installing our bathroom exhaust fan. He was on time, very clean and charged me the price he quoted. He even wore protective booties over his shoes while inside the house. I'm now looking for more projects for Ben to do. Thank You again, see you soon Ben."
apartment rewire
main service panel upgrade multi meters
tesla
new 3 phase commercial electrical panel
solar ready main panel

+123

Response time5 hrs
4 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Divine Electric, Inc.
Divine Electric, Inc.
4.4(
29
)

Serving Greenbrae, CA and surrounding areas

Approved

In business since 2003

Warranties offered

Credit card accepted

"Joseph was on the job when he said he would be here. He is knowledgeable about the issue I presented, but did not try to oversell me on the job. He did notice that an electrical outlet could be improved with not a lot of time or money and which made my system safer. I would definitely hire Joseph and DIvine Electric again when I need them. Carol Fabric"
Service Marin since 2003!
The team!
The team!
The team!
The team!

+4

Response time1 day
27 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Sonoma Coast Electric, Inc
Sonoma Coast Electric, Inc
5.0(
6
)

Serving Greenbrae, CA and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

"I had 2 ceiling fan/lights installed in the bedrooms. Installation included 2 new circular circuit boxes in each bedroom ceiling. In addition, I replaced the kitchen ceiling light with an LED fixture. The 2 workers were very polite and professional and worked quickly and efficiently, in addition to being respectful of my personal belongings."
Multimeter Test
100 amp Sub Panel
100 amp Sub Panel
Installing Unistrut
Stripping Wire

+3

Response time1 day
Response rate94%
9 neighbors recently requested a quote
Avatar for ED Electric Group Inc.
ED Electric Group Inc.
4.7(
42
)

Serving Greenbrae, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"The proprietor, Michael Martins attended my service request, installation of a Tesla wall charger, promptly, friendly and professionally. The electrician, Edward, was first class."
Tesla Ev charger
Office lights
Unique chandelier lights
Pendent light
Lights

+4

Response time1 day
Response rate97%
Recommended by100%of homeowners
Avatar for E Fitzgerald, Inc.
E Fitzgerald, Inc.
4.2(
27
)

Serving Greenbrae, CA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"I recently bought an plug in EV vehicle and need a 220 charger installed. I had heard great things of Sean Conners of EFI so I contacted him. He promptly came by and gave me a fair quote, he even advised on me on the charger. Sean communicated very well and did the installation within days of me getting my charger. His work was excellent and I have no hesitation in recommending him highly. Do yourself a favor and use this professional electrician for all your electrical needs."
Electrical
Response time2 days
18 neighbors recently requested a quote
Recommended by66%of homeowners
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Generator Install questions, answered by experts

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

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

If you’re deciding between a solar battery versus a generator for the best backup power solution, you can take a few factors into consideration. Solar batteries are quiet while generators can be quite loud. Generators have a lower up-front cost, but they require fuel and ongoing maintenance while solar batteries are more expensive but don’t have many ongoing costs.

The Greenbrae, CA homeowners’ guide to generator installs

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