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Avatar for NRG Clean Power
NRG Clean Power
4.6(
51
)

Serving Cotati, CA and surrounding areas

Approved (Corporate)

In business since 1996

Free estimates

Warranties offered

"Roberto Sanchez Solar System, I interviewed 4 solar panel companies and I chose NRG because Will was able to explain everything well. He answered all my questions to my complete satisfaction. Friendly and honest, Will made the sales process very smooth and personable. Tiffany helped and coordinated the project to make sure everything goes well. She always got back to my emails and phone calls promptly. Installers completed the solar panels when I was at work. Came home and he solar panels were on the roof. Definitely a nice install and quality work was delivered. Lisa helped out with the financing on the HVAC. She was patient and I believe got me a lower amount that before. Solar edge app is great to use and straight forward. Highly recommended company thanks NRG. I am excited to use my new solar system!"
Rooftop Solar
Solar Installation
Solar Panel Install
Home Solar Install
Solar System Install

+5

9 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for EnergyAid
EnergyAid
3.6(
130
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2012

Emergency services offered

Warranties offered

"Jorge came on time, conducted a thorough inspection and explained the results. I'm glad to have found a company that can inspect my solar system after the installation company went out of business"
Voltage Testing
Solar Panel Removal and Reinstall
Two Batterys
Bird Skirt
Communication Repair

+20

Response time1 day
15 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for Bragg Home Services
Bragg Home Services
5.0(
12
)

Serving Cotati, CA and surrounding areas

Approved

In business since 1968

Free estimates

Warranties offered

For over 56 years Bragg Home Services has specialized in offering residential and light commercial plumbing, heating, and air conditioning services to the residents of Sonoma, Marin, and Napa Counties. At Bragg Home Services we know that our customers expect integrity, excellence, value, and commitment. That’s why at Bragg Home Services we hire only the best people, and use only the best products, offering exceptional value, backed by our lifetime workmanship guarantee. Because at Bragg Home Services, your satisfaction is our number 1 priority.

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time8 hrs
Response rate98%
5 neighbors recently requested a quote
Avatar for Sunriver Solar Power Systems
Sunriver Solar Power Systems
5.0(
2
)

Serving Cotati, CA and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"Unfortunately my husband s company is moving us to the midwest. Even though we had a signed contract with Rick and Teresa at Sunriver Solar, they we very understanding and basically told us not to worry about it and to enjoy our next adventure. They even asked if they could help us with any of the moving stuff!!! They are a delight to work with, they do everything, they kept us up to date on what was going on, and, even though we could not work with them, we would highly recommend them. You really cannot go wrong with Sunriver Solar."
Reduce your carbon footpr
Grass Valley Ground Mount
Solar on a workshop
Home Installation
Home Installation

+12

Response time12 hrs
Response rate92%
Recommended by100%of homeowners
Avatar for Northern Pacific Power Systems, Inc.
Northern Pacific Power Systems, Inc.
5.0(
4
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

Here at Northern Pacific Power Systems, Inc., 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. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Com3
Ground Mount in Vineyard
Standard ground mount
Com1
Large residential ground mount 2

+31

Response time2 days
Response rate86%
Recommended by100%of homeowners
Avatar for Sonoma Coast Electric, Inc
Sonoma Coast Electric, Inc
5.0(
6
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

Sonoma Coast Electric, Inc is a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. 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.

Multimeter Test
100 amp Sub Panel
100 amp Sub Panel
Installing Unistrut
Stripping Wire

+3

Response time1 day
Response rate94%
14 neighbors recently requested a quote
Avatar for Sunrun Inc
Sunrun Inc
5.0(
1
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"The #1 home solar & battery company in America. We know going solar can be complicated. We are here as your expert guide every step of the way. With our customers, we are creating a planet run by the sun. Unrivaled home solar and battery experience\nWith 900,000 homes and counting, no one has more installation expertise.Smart technology\nAn ecosystem of innovative products that put you in control of your home energy needs. Payment solutions for every home\nTailored plans including predictable monthly payments, little-to-no money down, and no-debt options. The Sunrun Guarantee\nThe industry's most comprehensive repairs, maintenance & monitoring program.\n"

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Solar Panels questions, answered by experts

While you can install solar panels by yourself, it can be a complicated process full of lots of manual labor, risky roof work, and knowledge of electrical wiring. Most solar panel installation projects should be reserved for a trained professional—especially if you plan on connecting your panels to the electrical grid rather than for off-grid use, which doesn’t require utility services.

The average cost to install solar panels is around $27,000, with most homeowners paying between $4,500 and $54,000. These prices don’t consider the federal investment tax credit (ITC), which can reduce costs by up to 30%. The final price depends on several factors, including the size of the system needed to offset your energy consumption, the amount of sunlight your home receives, your geographical location, the type and brand of panels, labor costs, and any add-on products like solar batteries or electric vehicle (EV) chargers. It is recommended to get price quotes from at least three solar companies in your area to find the best deal.

No, you cannot turn on a new solar system before inspection. The inspector checks that the system is correctly connected to the grid and that safety components and features are in place. This process prevents problems on the electrical grid and offers protection against fire in your home. 

Your local utility company may also require inspection documentation before you can connect to the grid. An inspection can ensure solar power efficiency and determine how you might increase it.

The best solar-panel mounting system will depend on your property layout, but you’ll typically want to try for south-facing panels to get the most sun. Roof mounting and wall mounting are both popular, but if your well setup is far away from buildings and other structures you can also set up a freestanding aluminum frame to mount your panels.

It’s possible that installing solar panels can lead to mold on the roof. The panels themselves are not the issue. Problems caused by improper installation—such as roof leaks and mounts that aren’t sealed properly—can cause mold. Another potential cause of mold is debris accumulation under panels, which can trap moisture. If you live somewhere with extreme snow, rain, or hail, your home could be more prone to mold.

The Cotati, CA homeowners’ guide to solar panel services

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